Elmdene 2405STE Manual 

Page 1 of 4 ELMDENE INTERNATIONAL LIMITED 3 KEEL CLOSE INTERCHANGE PARK PORTSMOUTH HAMPSHIRE PO3 5QD, UK TEL: +44 (0) 23 9269 6638 FAX: +44 (0) 23 9266 0483 www.elmdene.co.uk 2402STE Intelligent Switch Mode Power Supply: EN54-4 Certified 27.6Vdc 2A PSU with Intelligent Battery Charging, Monitoring and Remote Fault Signalling OVERVIEW The 2402STE is a fully featured EN54-4 approved power supply ideal for use in Fire Systems and Access control applications. Its regulated 27.6V dc output will supply up to 2A continuous into the load, in addition to providing up to 0.8A for charging the standby batteries. The power supply output features electronic short circuit protection under both mains and standby battery operation. Maximum battery life is assured through continuous active battery monitoring and the use of a three stage charger, comprising bulk, absorb and temperature compensated final float phase depending upon battery condition. Deep discharge protection prevents premature battery failure when operating from standby for extended periods. Two sets of volt free solid state relay fault output signal (i) loss of mains and (ii) battery fault, charger fault and loss of output. • Certified by VdS to EN54-4:1997 +A1: 2002 + A2: 2006 • 2A current to load at 27.6V dc nominal regulated output • Electronic overload protection shuts down output until overload or short circuit is removed • Battery Monitor detects battery missing, low battery, short-circuit or reverse connection • Battery charging circuit is energised only when a battery is correctly connected and the battery voltage is greater than 14V • No loss of output during automatic connection of battery to load on loss of mains • Deep discharge protection disconnects battery from load when battery voltage falls to 21V • Automatic start-up on battery only • Fault indicator LED (Red) flashes on detection of output fault, battery fault, charger fault and mains failure • Mains indicator LED (green) showing mains present COMPLIANCE This power supply unit complies with the following European Directives: Low Voltage 2014/35/EU EMC 2014/30/EU WEEE 2012/19/EU RoHS2 2011/65/EU CPR305/2011 EU SPECIFICATION Input Voltage 93Vac minimum, 264Vac maximum Frequency 45Hz – 65Hz Current 1.25A maximum for a 2A load and 0.8A battery charging Inrush current 30A maximum @ 25 OC, 110Vac for 10ms Mains input fuse T3.15A 20mm, 250Vac HBC Output Voltage 26.0Vdc – 28vdc on mains power / 18Vdc – 26Vdc on battery standby Load Current 0 - 2A Ripple 100mV max over full rated mains voltage Load output fuse T2A 20mm, 250Vac glass Overload Electronic shutdown at 4.5A until overload or short circuit removed Standby Battery Battery Capacity 2 x 17Ah maximum (e.g. Yuasa NP17-12) series connected Battery fuse protection T2A 20mm glass Battery Charging Constant current (0.8A) bulk charging to 80% within 24 hours, float charging to 100% within 48 hours Low Battery Threshold Voltage 23V nominal Deep discharge protection Battery disconnect at 21V nominal Quiescent current - no load 25mA nominal Quiescent current - battery cut off <70µA Mechanical Case material 1.2mm steel, white powder coated Size 400mm W x 420mm H x 80mm D Weight 6.2kg (excluding batteries) Environmental Temperature -10 to +40 OC (operating) 95% RH non-condensing -20 to +80 OC (storage) CONNECTIONS O/P + and - Voltage output to load PSU Fault Solid State Relay output contacts EPS fault Solid State Relay output contacts Temp sensor Connection to battery temperature sensor BATT + and - Connections to standby batteries FAN + and - No Connection VdS G209142 09 0786-CPD-20787

Page 2 of 4 FEATURES Loss of Mains and Brown-out compensation If the mains input has been lost for greater than 10s, a Loss of Mains condition is detected, an EPS Fault is signalled and the green Mains LED is extinguished. Short duration mains “brown-out” conditions are not signalled thus reducing nuisance alarms. The red Fault LED will show a heart- beat pulse indicating that the PSU is operating correctly in standby mode. Standby Operation When the mains input is lost, the power supply will automatically switch to the standby batteries and provide uninterrupted power the connected load whilst there is capacity in the standby batteries. The front panel Fault LED is pulsed periodically to indicate that the PSU is healthy and operating in standby mode. During standby operation, the standby battery voltage is continually monitored. Once this drops below the Low Battery Voltage threshold (approximately 23V), a PSU Fault signal is generated and a Low Battery condition is signalled on the front panel LED. Battery Management The standby batteries are tested regularly. If a battery becomes disconnected, a PSU Fault signal will be generated within 20s of the disconnection. If the impedance of the battery circuit connections increases above 500mΩ, for example due to corrosion or damage to the cabling, a PSU Fault signal will be generated within 60 minutes. If the battery is unable to supply significant current to the load, for example due to cell degradation, a PSU Fault signal will be generated within 24 hours. Battery Charging The standby batteries are charged automatically when the mains is present. The PSU uses a fast bulk charge regime to quickly recharge the batteries to approximately 80% capacity followed by a reduced charging current to reach full capacity. The batteries are held at full capacity using a temperature compensated float regime. The battery temperature is measured at its terminals using a special sensing probe. An extended probe may be fitted for use with an external standby battery pack. Note: if the batteries are disconnected the battery charger is switched off and there will be NO measurable voltage at the BATT terminals. Battery Auto-Start The power supply will self-start if a set of charged standby batteries are connected without any mains present. An EPS Fault signal will be generated under this condition. Note: a pause of 5s must be observed between repeated battery connections and disconnections to guarantee an auto-start. SIGNALLING Fault Outputs: 100mA @ 60Vdc solid state relay (Open indicates fault condition) EPS Fault PSU Fault Condition Possible Cause Action CLOSED CLOSED Normal operation Mains present Battery fully charged None OPEN CLOSED Standby Mode Mains lost Battery driving load Investigate loss of mains CLOSED OPEN Fault Present Blown fuses Battery fault Overload Internal fault Investigate fault source using diagnostic LED Rectify fault where possible OPEN OPEN PSU Shutdown Mains lost Standby battery exhausted Restore mains as soon as possible Local Indicators – front panel Red LED Fault Green LED Mains Condition Possible Cause Action OFF ON Normal operation Mains present Battery fully charged None FLASH CONTINUOUS ON or OFF Fault Blown fuses Battery fault Overload Internal fault Contact service engineer 1 PULSE OFF Standby Mode Mains lost Battery driving load Investigate loss of mains Diagnostic Indicator – internal Red LED Diagnostic Green LED Mains Condition Possible Cause Action OFF ON Normal operation Mains present Battery fully charged None OFF Standby Operation Mains Lost. No faults present Battery driving load Investigate loss of mains ON CONTINUOUS ON or OFF Internal Fault Software fault detected PSU running in Safe Mode Return to manufacturer FLASH CONTINUOUS ON or OFF No output Output fuse blown Output overload Output short circuit Check and replace output fuse Disconnect output load and test load 1 PULSE ON Battery Charging No faults active Battery charging normally but < 90% of full charge None 2 PULSES ON No Battery Battery disconnected Battery fuse blown Battery heavily discharged Check battery connections Check and replace battery fuse Check battery terminal voltage and replace if battery aged OFF Low Battery Volts Standby Mode Battery almost discharged Restore mains as soon as possible 3 PULSES ON or OFF Battery Fault High impedance in battery connection Battery internal fault Check battery connections for damage e.g. corrosion. Replace battery if aged 4 PULSES ON or OFF Charger Fault Internal failure of battery charger Return to manufacturer 5 PULSES ON or OFF Battery Temperature Probe Fault Battery temperature monitor disconnected or damaged PSU running in Safe Mode Check temperature sensor connections and condition of sensor and cable Replace if suspect

Page 3 of 4 INSTALLATION This unit is only suitable for installation as permanently connected equipment. The PSU is NOT SUITABLE for external installation. This unit must be fed from a mains power source having a separate (approved) disconnect device and fitted with a fuse or other over-current protection device rated at 3A maximum. Ensure that the disconnect device used has appropriate earth fault protection to the applicable standard. Where the PSU is used to provide power to a fire alarm circuit, the mains isolation and disconnect device should be provided solely for this purpose and be suitably marked “FIRE ALARM – DO NOT TURN OFF”. All cabling should meet national and local fire system installation regulations, e.g. FP200 type cable for high integrity installations. Where the PSU is used for other applications, it should be installed according to all relevant safety regulations applicable to that application. Where the PSU Fault and EPS Fault outputs are used, they should only be connected to circuits having voltages less than 60V dc. Cable Sizing 1) Mains input cable must be to the applicable standard with a 3A or greater current capacity, i.e. 0.5mm2 nominal conductor area, having a minimum operating voltage of 300/500 Vac. 2) The low voltage output cable must be sized to carry the rated load current to the devices connected to the PSU. 3) Mains input and low voltage output cables should be routed to use different entry / exit holes in the case. Bushes should be used to protect cable sheaths from chafing. Ensure that these bushings are correctly sized (i.e. close fitting with respect to cable sizing). Note that the bushes should meet a minimum flammability specification of UL94 HB. 4) All cabling should be securely fastened in position using a cable tie through the saddles provided. Mounting 5) Fix to wall or other support structure in correct orientation i.e. with hinge on left hand side, using screws of sufficient size and length through the mounting holes. 6) PSU should be mounted no further than 10cm from the control and indicating equipment, close coupled by conduit. 7) Knock-outs are provided in the case for mating with external trunking or conduit. 8) Ensure that all unused holes (on the rear of the case) are sealed to prevent the ingress of damp and dust. COMMISSIONING Mains Power Up 1) With no external connections made to the PSU, connect the mains input wires to the terminal block, ensuring that the mains isolator (disconnect device) is open. Fasten wiring in place with cable tie to saddle. Note: Equipment must be earthed. 2) Apply mains input. Ensure that the green Mains LED illuminates and that the red Fault LED flashes after approximately 20s (indicating a disconnected battery). 3) Disconnect the mains power. Load Output and Remote Signalling 4) Connect the EPS and PSU Fault outputs to the appropriate inputs of control equipment if remote fault monitoring is required. 5) Loop the load (output) wiring through the supplied ferrite EMC suppressor as shown in Figure. 1. Cable tie to saddle provided (adjacent to exit hole). 6) Re-apply mains. Verify that the green Mains LED illuminates and the red Fault LED flashes after approximately 20s (disconnected battery). 7) If connected, verify that the EPS Fault monitor shows a closed contact and the PSU Fault monitor shows an open contact. 8) Perform a full functional test of system including full alarm condition. Standby Battery 9) Mount two 12V 17Ah batteries in lower part of enclosure. 10) Connect the two 12V standby batteries in series using the single cable provided. Connect the negative of one battery to the positive of the other. DO NOT CONNECT the other two battery terminals to each other. 11) Connect the free Positive and Negative terminals of the batteries to the PCB terminals Batt+ and Batt - using the cables provided. See Figure 2. 12) Ensure the temperature sensor and battery connections are made according to figure 2. 13) Verify that the red Fault LED stops flashing after about 20s (battery connection detected). Verify that the remote PSU Fault monitor shows a closed contact. 14) Disconnect the mains power. Verify that the green Mains LED extinguishes and the red Fault LED starts to pulse (indicating that the PSU is running from its standby batteries). 15) If connected, verify that the EPS Fault monitor shows an open contact and the PSU Fault monitor shows a closed contact. 16) Perform a full functional test of system including full alarm condition. Verify that the standby batteries can support the system load. Note: ensure batteries have sufficient charge. Final 17) Reconnect the mains. Verify that the green Mains LED illuminates and the red Fault LED extinguishes. 18) If connected, verify that the EPS Fault monitor shows a closed contact and the PSU Fault monitor shows a closed contact. 19) Close cover and secure using fastening screws provided. OPERATING INSTRUCTIONS This unit is intended for use by Service Personnel only. There are NO USER SERVICEABLE parts inside. The green Mains LED will be illuminated whilst the mains supply is present. In the event of a failure, the red Fault LED will flash and the solid state remote fault output contacts will open. Figure 1 - Ferrite EMC suppressor Figure 2 – Connection of battery leads and temp sensor to terminal block.

Page 4 of 4 Maintenance There is no regular maintenance required of the PSU as the microcontroller performs regular health checks of the battery and output voltage. However, reference should be made to the battery manufacturer’s documentation to determine typical / expected battery life with a view to periodic replacement of the battery. If the output of the PSU fails the cause of the failure should be investigated e.g. short circuit load, connection of a deeply discharged battery. The fault should be rectified before restoring power to the PSU. The following fuses may need to be replaced. Ensure the correct fuse rating and type is used. Load Output Fuse T2A 20mm, 250Vac glass Internal Mains Fuse T3.15A 20mm, 250Vac HBC Battery Fuse T2A 20mm, 250Vac glass CAUTION Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the battery manufacturer’s instructions and all local and national regulations The packaging supplied with this product may be recycled. Please dispose of packaging accordingly.