Kimray DACC2000 Operation & User’s Manual

Kimray, Inc. provides this publication “as is”, without warranty of any kind, either express or implied, including, but not limited to, the implied warranties of merchantability or fitness for a particular purpose. Information in this publication is subject to change without notice. For current revision go to : http://www.kimray.com:8100/Public/Literature/Automation © 2005 – 2006 Kimray, Inc. All rights reserved.

Contents 1.0 Overview of the DACC2000 1.1 1.1 Introduction 1.1 1.2 Features 1.1 2.0 Installation 2.1 2.1 Power Interconnection 2.2 2.2 Signal Connections 2.3 2.2.1 Analog Inputs 2.3 2.2.2 Digital Inputs 2.5 2.2.3 Accumulator Inputs 2.6 2.2.4 Relay Outputs 2.6 2.2.5 Analog Outputs 2.7 2.2.6 Display connection 2.7 3.0 Communications 3.1 3.1 Port Connections 3.1 3.2 RS-485 3.2 4.0 Operation 4.1 4.1 Internal 4.1 4.2 Input/Output 4.1 4.2.1 Analog Inputs 4.1 4.2.2 Status Inputs 4.2 4.2.3 Accumulator Inputs 4.2 4.2.4 Relay Outputs 4.3 4.2.5 Analog Outputs 4.4 4.2.6 Power Switching 4.4 4.2.7 Display Interface 4.5 4.2.8 Communications 4.6 5.0 Specifications 5.1

1.0 Overview of The Kimray DACC2000 RTU 1.1 Introduction This document describes the Kimray DACC2000, an RTU for data acquisition, supervisory control and communications designed to handle the requirements of oil and gas field automation. Included in this manual are the following sections:  Features  Installation  Communications  Operation  Specifications 1.2 Features  Full Production Control with PROcontrol  Multi-run Flow Computer  Store and Forward Capability  Solar Powered  Internal Temperature Compensated Charger  Dependable in Harsh Environments  Flexible and Cost Effective  RTU Initiated Communications  Integrated Telemetry  512K EPROM and 512K RAM  CMOS Ultra Low Power Design  Four Serial Communications Ports (Three RS232 & One RS485)  Display Port  Expandable using the RS485 port

2.0 Installation This section describes configuring your DACC2000 RTU and connecting it to other devices. EPROM COMM1 KIMRAY DACC2000 KIMRAY RS-485 DIGITAL INPUTS ACCUMULATOR INPUTS ANALOG INPUTS DIGITAL OUT DISPLAY PWR GND 485+ 485- 0+ 0- 1+ 1- 2+ 2- 3+ 3- V+ ACC0+ ACC0- GND ACC1+ ACC1- V+ 0+ 0- V+ 1+ 1- V+ 2+ 2- V+ 3+ 3- 0COM 0NO 0NC 1NC 1NO 1COM 2COM 2NO 2NC 3NC 3NO 3COM ANALOG OUT0 GND VOLT CURR VOUT GND BATT GND CHGR GND RAD+ GND AUX+ COMM2 PERIPH F1 F1 F2 F3 RS-485 DIGITAL INPUTS ACCUMULATOR INPUTS ANALOG INPUTS DIGITAL OUTPUTS ANALOG OUTPUTS POWER I/O FIGURE 2.1 DACC2000 TERMINAL BLOCKS Figure 2.1 shows the locations of the DACC2000 terminal barriers. All process wiring to the

DACC2000 terminates in the modern version of terminal strip called a "compression screw solderless connector". This form of connector requires no soldering or lug to be placed on the end of the wire, but instead uses a "bare wire" termination technique. "Bare wire" terminations have been shown to be generally superior to the use of ring or spade lugs hand compressed to the ends of signal wires and terminated with screw terminals. The bare wire termination usually results in corrosion resistant "cold flow gas-tight seals", whereas the hand compression lug terminations usually do not. Bare wire terminations are also much faster to install. The recommended technique for bare wire terminations is very simple: strip 1/4" of insulation from the end of the wire, insert into an open termination slot, and turn the compression screw tight with hand pressure using a pocket screwdriver. 2.1 Power Interconnection This section describes connecting your DACC2000 to the Battery, Radio, Charging Source and other power devices. The power terminal barrier is on a plug in card on the bottom right of the DACC2000 (refer to Figure 2.1). Figure 2.2 illustrates the connections and fuse locations. KIMRAY ANALOG OUT0 GND VOLT CURR VOLT GND BATT GND CHGR GND RAD+ GND AUX+ F1 F2 F3 AUXILLARY + DEVICES - RADIO + - - BATTERY + - SOLAR PANEL OR + DC SUPPLY 3A. AUXILLIARY OUT 3A. RADIO POWER 5A. BATTERY INPUT 20V.OUTPUT Optional Extension to top of Card FIGURE 2.2 DACC2000 POWER INTERCONNECTIONS AND FUSING Solar Input A 12 volt solar panel is normally used as the charging source for the battery. The positive output of the panel connects to the CHGR terminal and the minus to the GND terminal as shown. The Battery is automatically charged with no external charger controller required. The maximum current for the charger on the DACC2000 is 4 Amp. This limits the maximum size of the solar panel controlled by the DACC2000 to 70 watts. If a larger solar panel is required, an external battery charging regulator must be used.

Direct Current power from an AC power supply can also be used to charge the battery. The positive output voltage is connected to the CHGR terminal and the minus output to the GND terminal. When using a voltage source for charging the battery, the voltage must be high enough to adequately charge the battery. A voltage of 15 to 16 Volts should be satisfactory for a 12 Volt battery. The power supply output must be current limited to less than 4 A. Battery Input The positive terminal of the battery connects to BATT and the minus to GND. For proper operation the battery voltage must be greater than the cutoff threshold (11.5V). Radio Output The radio connection provides software switched power from the battery for a 12 volt radio. Switching provides for the radio to be electrically disconnected under program control when the battery voltage is low. The RAD+ terminal connects to the plus terminal of the radio and GND to the minus terminal. Auxiliary Output The Auxiliary Output provides battery voltage that is switched off along with the DACC2000 because of low (<10.5 Volts) battery voltage. AUX+ is positive and GND is minus. 20V. Output An optional extended version of the plug-in power card provides a terminal strip with two 20V outputs on the top of the card. This can be used to provide power for 4-20mA sensors. 2.2 Signal Connections 2.2.1 Analog Inputs Analog input signals are typically subject to the effects of induced electrical noise. Proper wire routing and shielding can reduce this noise by orders of magnitude. A recommended noise reduction technique is using shielded twisted pair wiring between the signal source and the DACC2000 termination. Twisted pair wire with a minimum of 6 twists per inch will cancel noise induced by 60 Hz AC current by introducing equal and opposite currents in both wires. The shield should be a 100% coverage metallized plastic with a copper drain wire. Any currents carried or induced in the shield are conducted to the bare drain wire which is to be connected at one end only to a ground. The end to be grounded is normally considered to be the end closest to the source of power. The shield on signal wires coming from self-powered transmitters should be grounded close to the transmitter itself. The shield on signal wires to unpowered field transmitters which draw DC power from the DACC2000 should be grounded at the DACC2000. If there is more than one grounding point of the shield, local conditions will occur in which substantial currents flow in the shield due to small differences in ground potential. Not only will this induce process noise, but it can cause heating of the shield and drain wire, and even burn-out of the cable. The shield and drain wire at the ungrounded end should be stripped back and cut cleanly at the edge of the overall cable jacket. If the analog signals must pass within the electromagnetic fields of large motors, the twisted shielded pairs should be inside metal conduit for the section exposed to the field. This will provide protection from large induced voltages. Analog signal wires should not be run in the same conduit with AC electrical power wiring which can also produce large magnetic fields. Figure 2.1 shows the location of the terminal blocks and Figure 2.3 illustrates the input connections.

ANALOG INPUTS V+ 0+ 0- V+ 1+ 1- V+ 2+ 2- V+ 3+ 3- V C C 20 V. POWER SUPPLY JP4 JP5 JP6 JP7 F1 JP1 ½ A. fuse for internally provided power for Analog, Status and Accumulator inputs Jumper for Internal +12v to be used for Analog V+ power Jumpers to connect 250 Ohm resistors for current loop inputs FIGURE 2.3 DACC2000 ANALOG INPUT CONNECTIONS The voltage output pins of the terminal block are connected to the internal fused battery voltage by jumper JP1, shown in Figure 2.3. The fuse for this power is F1, also shown in Figure 2.3. Jumpers are provided for each analog channel of the DACC2000, as illustrated in Figure 2.3, to configure shunt resistors for each channel. JP4 through JP7 are used to connect 250 shunt resistors to each channel for using 4 to 20 mA input signals. The resistors are enabled by closing the jumper. As long as the jumper is open the resistor is not used and the input is set up for a 1 to 5V input signal. The following table describes the current loop resistor corresponding to each Jumper. Analog Input Current Loop Jumpers AI 0 JP4 AI 1 JP5 AI 2 JP6 AI 3 JP7 Current Inputs Most 4 to 20 mA process transmitters are unpowered, meaning that the signal line carries both power and the signal. They are used by connecting a common DC power source in series with the transmitters. When a voltage of 20 Volts is required for the sensors, it must be supplied by an external supply. Figure 2.3. shows current transmitters connected to channels 1 and 2 using an external 24 volt power supply. The minus terminal of the supply can be connected to ground

as shown (the minus input of a channel) if the Normally Closed solder jumper for that channel is closed. If all sensors are powered from the same supply, Jumper JP2 (Figure 2.4) can be removed and the external supply connected to one of the V+ terminals. This provides the external voltage to all of the other V+ terminals on the analog input terminal blocks. The internal voltage may be used instead of an external power supply if 12 volts is sufficient to drive the transmitter. 12 volts is usually not adequate because the voltage available for the transmitter is 12 volts minus the 5 volts for the 250 ohm resistor minus the voltage drop in the signal lines. Thus the available voltage is less than 7 volts which is not usually sufficient. Each external high level channel is provided with a 250 resistor for use with the 4 to 20 mA signals to convert the current to a 1 to 5 volt signal. The resistor is enabled by closing the jumper (shown in Figure 2.3) for the channel. Voltage Inputs 1 to 5 volt transmitter signals are connected as shown in Figure 2.3 when the DACC2000 is providing the power for the transmitter. The shunt resistor jumpers remain open, keeping the 250 ohm resistors out of the circuit. 2.2.2 Digital Inputs Each digital input is terminated in two compression screws in the terminal barrier located on the left edge of the DACC2000 (refer to Figure 2.4). Open inputs are read as a 1 and closed inputs as a 0. Each closed input causes a corresponding LED to light. Physical status conditions are commonly detected by the closure of a switch or by an open collector transistor output (illustrated in Figure 2.4). Manual inputs are often a pushbutton depression. These result in the closure of a physical electrical contact. DIGITAL INPUTS ACCUMULATOR INPUTS 0+ 0- 1+ 1- 2+ 2- 3+ 3- V+ ACC0+ ACC0- GND ACC1+ ACC1- Turbine Meter JP2 JP3 FIGURE 2.4 DACC2000 DIGITAL AND ACCUMULATOR INPUT CONNECTIONS 2.2.3 Accumulator Inputs One accumulator input (Accumulator 0) terminates in the four compression screws of the Accumulator 0 terminal strip (refer to Figure 2.4). The terminals are: V+, ACC0+, ACC0- and

GND. The other input is terminated in 2 compression screws in the other barrier strip (ACC1+ AND ACC1-). Two LEDs, one per channel monitor the input states. The frequency response of Accumulator 0 is jumper selectable with Jumpers JP2 and JP3. When no jumpers are used there is no filtering of the input. Jumper JP3 enables filtering. With the other jumper out the channel will have a response of approximately 30 Hz. If the other jumper for is used (JP2) the frequency response increases to 1 kHz. The DACC2000 is normally set for 30 Hz filtering. Some devices generate or switch ON a voltage when they change state (voltage input devices). Some devices only close a contact when the state is changed. The state of both types of devices are sensed with the Accumulator 0 input interface. Contact Input Devices Contact closure inputs are powered from the DACC2000. V+ will be connected to ACC0+ and the switch (or open collector transistor) will be between ACC0- and GND. This is illustrated in Figure 2.4 where the input is connected between ACC0- and GND. Voltage Input Devices The most common type of voltage input device is the relay or switch. When open, there is no power on the switched side of the device. When the relay is energized or the switch is closed, there is power on the switched side of the device. Wiring from the switched side of the device and a power return provides the required sensing signal. For this case the input is connected between ACC0+ and ACC0- and the V+ terminal is not used. Turbine Meter Input The DACC2000 can be connected directly to a turbine meter. The low level signal from the turbine meter should be connected directly to the terminals of ACC1. This is illustrated in Figure 2.4 where the input is connected between ACC1- and ACC1-. 2.2.4 Relay Outputs The DACC2000 has 4 relay (digital) output channels, each a set of form C contacts (SPDT). The DIGITAL OUT 0COM 0NO 0NC 1NC 1NO 1COM 2COM 2NO 2NC 3NC 3NO 3COM RELAY RELAY RELAY RELAY FIGURE 2.5 DACC2000 RELAY OUTPUT CONNECTIONS outputs of the relays are available on the terminal barrier along the bottom left of the DACC2000 card (refer to Figure 2.5). Each channel has three screw terminals: COM, NO and NC. The JP2 JP3 No Filtering JP2 JP3 1 KHz Filtering JP2 JP3 30 Hz Filtering

COM terminal is the pole of the relay, NO is the normally open contact and NC the normally closed contact. Each channel has an LED to indicate when the channel is energized. 2.2.5 Analog Outputs The two optional Analog outputs of the DACC2000 each generate a 4 to 20 mA DC output (which is normally required for process actuators) or a 1 to 5 volt output. The outputs are normally powered by the DACC2000 but can be powered from an external source. The analog output terminations are located along the bottom right edge of the DACC2000 card on TB7 and TB8 (refer to Figure 2.6). Each channel has four screw terminations labeled +VOUT, CURR, VOLT and GND. Current Sinking Outputs For connecting the current sinking output to a device with the DACC2000 supplying the power, connect as shown for channel 1 in Figure 2.6. The CURR terminal connects to the minus terminal of a device and the VOUT connects to the plus terminal. Jumper JP8 must be installed to power the outputs internally. ANALOG OUT0 JP8 GND VOLT CURR VOUT TB7 TB8 ANALOG OUT1 GND VOLT CURR VOUT + - DEVICE + - DEVICE EXT. + POWER - FIGURE 2.6 DACC2000 ANALOG OUTPUT CONNECTIONS When external power is used, the device's plus terminal is connected to the external power source and the minus terminal is connected to the CURR terminal of the DACC2000 as illustrated for Channel 0 in Figure 2.6. The external power source common is connected to the GND terminal. Voltage Outputs For a voltage output with internally supplied power, connect the minus terminal of the device to GND, the plus terminal to VOLT and jumper +VOUT to CURR as shown in Figure 2.7. When using externally supplied power, connect as shown for Channel 0 in Figure 2.7. The minus output of the power source connects to GND and the plus output connects to CURR. The device is connected for internally supplied power with minus to GND and plus to VOLT.

ANALOG OUT0 JP8 GND VOLT CURR VOUT TB7 TB8 ANALOG OUT1 GND VOLT CURR VOUT + - DEVICE + - DEVICE EXT. + POWER - FIGURE 2.7 DACC2000 VOLTAGE OUTPUT CONNECTIONS 2.2.6 Display connection Figure 2.8 shows the connection of the display to the Processor Card. The display interface connector is on the top center of the card. The Potentiometer by the connector controls the contrast of the display. DISPLAY CONNECTOR COMM1 KIMRAY DACC2000 DISPLAY COMM2 PERIPH CONTRAST ADJUSTMENT FIGURE 2.8 DACC2000 DISPLAY

3.0 Communications This section describes connecting the DACC2000 to communications devices and configuring the DACC2000's communications ports. 3.1 Port Connections The communications connectors are located along the top of the DACC2000 (Figure 3.1). XMIT XMIT RECEIVE COMM1 KIMRAY DACC2000 RS-485 DIGITAL INPUTS DISPLAY PWR GND 485+ 485- 0+ 0- 1+ 1- 2+ 2- 3+ 3- COMM2 PERIPH FIGURE 3.1 DACC2000 COMMUNICATIONS PORTS Table 3.1 shows the pinout of the three 9-pin DB-9 connectors. The PERIPH port (top of the card) is normally used for setup with the Local Operator Station (LOS) or equivalent. DB9 Pin# Direction PERIPH COMM1 COMM2 2 IN RXD RXD RXD 3 OUT TXD TXD TXD 4 OUT DTR(+6V) DTR(+6V) DTR(+6V) 5 GND GND GND 6 -5.5V -5.5V 7 OUT RTS RTS 8 IN CTS CTS 9 SLEEP TABLE 3.1

The COMM 1 port is used to communicate to the central computer via radio, wire line, etc. while the COMM2 port is typically used for a radio store and forward function or to connect to another field device.. Both COMM ports have an LED beside the connector. The LED is on whenever data is transmitted out of that port. In addition, there is one receive LED (refer to Figure 3.1) which is turned on whenever data is received from any port. 3.2 RS-485 The RS-485 port is on the top left of the DACC2000. RS-485 is an enhanced version of the RS- 422 balanced line standard. It allows multiple drivers and receivers (up to 32) on a two wire system. This allows you to put together large systems with many drop points. RS-485 is used as a 2-wire half duplex medium. The half duplex wiring of RS-485 requires only a single wire pair to interconnect all stations. Termination resistors should be placed at the opposite ends of the system. The DACC2000 has an internal termination resister connecting to the transmission line. A second termination resistor (120 ohm) should be placed at one of the devices on the RS-485 line. Refer to Figure 3.3 for an illustration of a typical RS-485 system. Notice the wiring goes from one device to another in a “daisy chain” configuration. The 2 wires for the RS-485 connection as well as the power and ground wires are connected as shown in Figure 3.4. This figure illustrates the connection of the Kimray Multivariable CIM and the Kimray I/O CIM to the DACC2000. Both of the CIMs have a termination resistor which can be installed with a jumper. Only one of the devices should have the termination resistor enabled. RS485 DEVICE RS485 DEVICE RS485 DEVICE RS485 DEVICE DACC2000 FIGURE 3.3 DACC2000 RS-485 SYSTEM CONFIGURATION

KIMRAY DACC2000 PWR GND 485+ 485- TB1 KIMRAY I/O CIM KIMRAY MULTIVARIABLE CIM FIGURE 3.4 DACC2000 AND KIMRAY CIM CONNECTION

4.0 Operation 4.1 Internal The DACC2000 uses the 80C188EB microprocessor which is the third generation addition to the Intel 80186/80188 family of embedded microprocessors. Intel's advanced CMOS technology has allowed the integration of many of the required peripheral functions with a high performance, low-power 8088 compatible CPU core. Kimray selected the 80C188EB for the DACC2000 due to its low power and high integration, allowing the DACC2000 to provide low power operation that does not sacrifice performance. The operating software for the DACC2000 is in an EPROM with a capacity of 512K bytes (524,288 bytes). The RAM size is also 512K bytes and is backed up by an onboard, replaceable lithium battery. A battery backed up clock/calendar circuit gives the DACC2000 time keeping capability even without primary power. The battery is the same as used for protecting the RAM. 4.2 Input/Output The DACC2000 input/output circuitry is designed to pass the IEEE-472-1974 2500 V Surge Withstand Test. 4.2.1 Analog Inputs The DACC2000 has 4 external analog input channels configurable for a range of 1 to 5 Volts or 4 to 20 mA. The DACC2000 also measures two internal signals. These are battery voltage and charger voltage. All inputs are measured by a successive approximation analog-to-digital converter with 12 bits of resolution. The analog section references a precision temperature compensated voltage reference. 30K 250 33K BATTERY VOLTAGE 4.7 F1 1A ANALOG INPUTS JP1 JP4 AI0+ AI1+ AI2+ FUSED VOLTAGE O 1 O 2 O 3 O 4 O 5 O 6 O 7 O 8 O 9 O 10 O 11 O 12 TB5 AI3+ V+ 0+ 0- V+ 1+ 1- V+ 2+ 2- V+ 3+ 3- FIGURE 4.1 DACC2000 ANALOG INPUT SIMPLIFIED SCHEMATIC

Each of the four external high level analog inputs is protected by a gas filled surge arrester. Additional protection for the input circuitry is provided by a filter resistor and capacitor for each channel. Each external high level channel is provided with a 250 resistor for use with 4 to 20 mA inputs. The resistor is enabled by closing the jumper for the channel. The resistor converts the 4 to 20 mA current into a 1 to 5V signal. Figure 4.1 illustrates the function of jumper JP2. It allows the internal, fused battery power to be used for powering the analog input devices. 4.2.2 Status Inputs The DACC2000 has 4 optically isolated digital (status) inputs. Figure 4.2 shows the circuit for one channel of the four. Each input is differentially surge protected with Metal-Oxide-Varistors to IEEE 472-1974. The input pull-up current for dry contacts is supplied from the DACC2000 internal power. When the plus input is connected to its minus input, a current flows from a resistor through an LED and through the optocoupler. This provides a signal read by the input circuitry and turns on the LED for the channel. 0+ 0- 1+ 1- 2+ 2- 3+ 3- DI0+ DI0- DI1+ DI1- DIGITAL INPUTS FUSED VOLTAGE O 1 O 2 O 3 O 4 O 5 O 6 O 7 O 8 1.0K 5.1K DI2+ DI2- DI3+ DI3- FIGURE 4.2 DACC2000 DIGITAL INPUT SIMPLIFIED SCHEMATIC 4.2.3 Accumulator Inputs The DACC2000 has 2 high speed accumulator (pulse) input channels, Accumulators 0 and 1. Accumulator 0 Accumulator channel 0 is optically isolated and differentially surge protected with Metal-Oxide- Varistors to IEEE 472-1974. The operating speed of the channel 0 input circuitry is 25 kHz minimum when no filtering is selected. Two jumpers are available to select filtering for input frequencies of 1 kHz or 30 Hz. When a voltage output device is connected to (refer to 2.2.1), it is connected between terminals 2 and 3 (see Figure 4.3). To operate the optical isolator, the input voltage must be high enough to allow sufficient current to flow through the input resistor. The low to high threshold of the photocoupler is typically 0.5 mA (1.0 mA maximum). With a current of 0.5 mA and with

voltage drops of 1.6 volts for the LED and 1.0 volt for the photocoupler, the typical input voltage for a low to high threshold is 5.6 volts. The maximum input voltage (current of 1.0 mA) is 8.6 volts. The typical hysteresis of 0.8, sets the low going threshold to 80% of the high threshold. A zener diode limits the voltage to 4.7 volts which limits the maximum current through the optocoupler to approximately 2.1 mA, independent of the input voltage. Accumulator 1 Accumulator channel 1 is designed for low level inputs and is differentially surge protected by back to back diodes. This limits the input voltage to less than 1 V. The pulses are then conditioned by special circuitry designed to accept a signal from a turbine meter. FILTER 1KH Z PULSE0 0.0047 1M 30K 1K VCC O 1 O 2 O 3 O 4 TB3 O 1 O 2 TB4 FUSED VOLTAGE 5.1K 0.01 +5V 0.01 10 2.2K 475K 475K 10K 10K 5.1K 0.001 PULSE 1 10M VCC V+ ACC0+ ACC0- GND ACC1+ ACC1- ACCUMULATOR INPUTS FIGURE 4.3 DACC2000 PULSE INPUTS SIMPLIFIED SCHEMATIC 4.2.4 Relay Outputs The DACC2000 provides 4 relay (digital) output channels. These channels are SPDT (Form C) relays with a 10 Amp rating. Each output channel provides both normally open (NO) and normally closed (NC) contacts.

0COM 0NO ONC 1NC 1NO 1COM 2COM 2NO 2NC 3NC 3NO 3COM BATTERY VOLTAGE VCC O 1 O 2 O 3 O 4 O 5 O 6 O 7 O 8 O 9 O 10 O 11 O 12 TB6 DIGITAL OUTPUTS FIGURE 4.4 DACC2000 DIGITAL OUTPUTS SIMPLIFIED SCHEMATIC 4.2.5 Analog Outputs The DACC2000 has 2 analog output channels. Each channel provides a 1 to 5 Volt or 4 to 20 mA output. Output power can be provided by the DACC2000 or Externally. Each Digital-to- Analog converter has a resolution of 12 bits, and the analog output circuit provides an overall accuracy of better than 0.1%. FROM D/A V+ CURR VOLT GND O 1 O 2 O 3 O 4 ANALOG OUTPUT 0 140 FUSED VOLTAGE 110 TO A/D FIGURE 4.5 DACC2000 ANALOG OUTPUTS SIMPLIFIED SCHEMATIC 4.2.6 Power Switching The DACC2000 has solid state switches (power FET's) to control battery charging, radio power and auxiliary power. Figure 4.6 illustrates the power control circuitry. The radio switch is controlled by the microprocessor and is normally used to shut off the radio when the battery power is low. The auxiliary power switch is used to shut off power to auxiliary devices which have their power supplied by the DACC2000. This switch automatically opens when a low battery condition is detected by the power control circuitry. The charger switch controls the charging of the battery by opening when the battery is charged and closing when the battery is low. The battery voltage is sampled by a resistor divider network and compared with a fixed

reference. The resistor divider network contains a thermistor which compensates the charging setpoint as the ambient temperature varies. VBATT O 1 O 2 O 3 O 4 O 5 O 6 O 7 O 8 TB1 F1 3 A F2 3 A F3 5 A VCHGR 0=charge AUX POWER SWITCH RADIO POWER SWITCH CHARGER SWITCH AUX+ GND RAD+ GND CHGR GND BATT GND FIGURE 4.6 DACC2000 POWER SWITCHING SIMPLIFIED SCHEMATIC 4.2.7 Display Interface The DACC2000 has a display interface to drive a character display. It includes a temperature compensated bias circuit (generating VO in Figure 4.7) to keep the contrast adjusted over ambient temperature variations. +5V t WR- RD- DISPCS- -5.5V D0 D1 D2 D3 D4 D5 D6 A1 A2 A3 A4 A5 A6 A7 A8 G DIR B1 B2 B3 B4 B5 B6 B7 B8 RS VO E R/W +5V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TO LC DISPLAY D7 RD- DEN FIGURE 4.7 DACC2000 DISPLAY INTERFACE SIMPLIFIED SCHEMATIC

4.2.8 Communications The DACC2000 has 4 serial communications ports (Figure 4.8). Three ports provide for RS-232 voltage levels and use standard DB-9 connector pinouts. Pin 4, the DTR pin, has 6.5 volts DC. This pin can be used either as DTR or can provide low current to a device attached to the port. The fourth communications channel provides an RS-485 port. Transmit LED's are turned on each of the COMM ports by using the RTS signal. Whenever the DACC2000 asserts RTS, the LED is automatically turned on. RXD0 TXD0 VCC GND RI DTR CTS TXD RTS RXD DSR DCD -> <- -> <- <- -> -> -> PERIPH (LOS) 5 9 4 8 3 7 2 6 1 J2 COMM1 GND RI DTR CTS TXD RTS RXD DSR DCD -> <- -> <- <- -> -> -> 5 9 4 8 3 7 2 6 1 J4 COM1TXD COM1RTS COM1RXD COM1CTS +6.6V -5.5V VCC 100 XMIT COMM1 DS11 CTS2 TXD2 RXD2 RTS2 SLEEP VCC XMIT COMM2 VBATT CTS3 TXD3 RXD3 RTS3 VCC 121 COMM2 GND RI DTR CTS TXD RTS RXD DSR DCD -> <- -> <- <- -> -> -> 5 9 4 8 3 7 2 6 1 J5 COM2TXD COM2RTS COM2RXD COM2CTS O 1 O 2 O 3 O 4 TB1 VOUT GND 485+ 485- 4.7 4.7 C7 0.1 RXD1 TXD1 RTS1 RECEIVE VCC RECEIVE FIGURE 4.8 DACC2000 COMMUNICATIONS CIRCUITRY SIMPLIFIED SCHEMATIC

5.0 Specifications POWER Consumption Approximately 30mA at 13.5 V. (current will increase when LED's are lighted for Digital Inputs, Accumulator Inputs or Digital Outputs. Actuating a Digital Output Relay also increase current consumption. Battery: 12 Volt (10.5 to 18 V.), Charger DACC2000 provides charging control for solar or AC charging sources - Solar: 12 V., 70 Watt maximum - AC: 15V, current limited to 3.5 A. MEMORY EPROM: 512K bytes RAM: 512K bytes standard ENVIRONMENT Temperature: -40 to +70C (-40 to +158F) Humidity: 0 to 95% relative humidity, non-condensing DIGITAL INPUT Channels: 4 Description: LED state indicator on each line. Compression type terminals. Dry contact sense current provided internally or externally. High = 8V minimum for a voltage input Isolation: Input lines optically isolated from DACC2000 electronics. DIGITAL OUTPUT Channels: 4 Description: Form C (SPDT) relays or Open Collector transistor outputs. LED state indicator on each line. Rating: 10A 125, 250 V ac 10A 30 V dc 1/3 HP 125, 250 V ac ACCUMULATOR INPUT Channels: 2 Description: LED state indicator on each line. Compression type terminals. One channel with  Preamplifier for low level turbine meter signals.  2 terminals. One channel with  Jumper selectable filtering of none, 1000 Hz or 30 HZ.  Dry contact sense or voltage input.  High = 8V minimum for a voltage input

Isolation: Input lines optically isolated from DACC2000 electronics on high level input. ANALOG INPUT Channels: 6 Description: 4 high level inputs 1 to 5 V or 4 to 20 mA inputs Single pole 3 Hz hardware filter Protected multiplexing Auto calibrated Common mode range: -3 V. to +8 V. including input voltage 2 dedicated inputs Battery voltage Charger voltage Compression type terminals. 12 bit resolution A/D conversion COMMUNICATION Channels: 4 Rate: 150 to 9600 baud, software selectable Connector: DB9 on three ports. Terminal Barrier on one port (RS485) Interface Type: RS-232, DTE on three ports, RS-485 on one port ANALOG OUTPUT Channels: 2 Description: 4 to 20mA or 1 to 5 V outputs Plug in compression type terminals. 12 bit resolution D/A conversion I/O RATINGS Auxiliary Output Switch: 3 Amp, AGA3 Battery Input: 5 Amp, AGA5 Radio Power Switch: 3 Amp, AGA3 Analog, Status and Accumulator power output: 1/2 Amp, AGA1/2