Fisher 304 Manuals

D200106X012 �Fisher Controls International, Inc. 1987, 1996; All Rights Reserved Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners. Type 304 and 304L Electrical Position Switch Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Mounting the Position Switch on the Actuator . . . 3 Mounting the Position Switch on Other Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical Connections 5 . . . . . . . . . . . . . . . . . . . . . . . Adjustment 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Principle of Operation 6 . . . . . . . . . . . . . . . . . . . Maintenance 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts Ordering 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Position Switch Common Parts . . . . . . . . . . . . . . . 8 Terminal Strip Assembly . . . . . . . . . . . . . . . . . . . . . 8 Position Switch Mounting Parts . . . . . . . . . . . . . . . 8 Additional Actuator Parts for Field Mounting 22 . . Introduction Scope of Manual This instruction manual provides installation, adjust- ment, maintenance, and parts ordering information for the Type 304 and 304L electrical position switches. This manual also provides ordering information for the hardware used to mount the switches on Fisher actua- tors. Figure 1. Type 304 Electrical Position Switch with Cover Removed W5939 / IL Only personnel qualified through training or experience should install, operate, and maintain these position switches. If you have any questions concerning these instructions, contact your Fisher Controls sales office or sales representative before proceeding. Description The Type 304 and 304L switches are normally mounted on a control valve actuator to operate alarms, signal lights, relays, solenoid valves, or other equipment when valve travel reaches predetermined points. The Type 304 position switch (see figure 1) is for ap- plications that require only one or two switches. The Type 304L position switch is for applications that re- quire three or more switches with a maximum of six switches (see figure 3). The individual switches can be adjusted to operate at any point of travel within the 90 degrees of cam rod rotation. Specifications Specifications for the Type 304 and 304L electrical position switches are listed in table 1. Instruction Manual Form 2007 October 1996 Type 304 & 304L Type 304 & 304L 2 Table 1. Specifications Available Configurations Type 304: Unit contains 1 or 2 switches Type 304L: Unit contains 3, 4, 5, or 6 switches Maximum Cam Rotation 90 degrees between point of actuation of first switch and point of actuation of last switch Switch Type Single-pole, double-throw Switch Electrical Ratings Service Ratings (when wired at the factory): See tables 2 and 3 Maximum Continuous Current: 20 amperes Maximum Inrush Current: 30 amperes with normal- ly-closed contacts; 25 amperes with normally-open contacts Electric Motor Rating: Capable of switching a 3/4 horsepower electric motor at 125 V ac or a 1-1/2 horsepower motor at 250 V ac Hazardous Area Classification Refer to the Hazardous Area Classification bulletins and the switch nameplate (see figure 2 for typical nameplate) Operating Temperature Range(1) –40� to +180�F (–40� to +82�C) Conduit Connection With Bushing: 3/4-inch NPT female connection ac- cepts a maximum of six 14-gauge wires Without Bushing: 1-1/4 inch NPT female connection accepts a maximum of eighteen 14-gauge wires For Explosion Proof Installation: Appropriate con- duit seal is required 18 inches (460 mm) from hous- ing Approximate Weight Type 304 (with 2 switches and cover): 5 pounds (2.3 kg) Type 304L (with 6 switches and long cover): 10 pounds (4.5 kg) Options Terminal Strip 1. This term is defined in ISA Standard S51.1-1979 Table 2. Direct-Current Service Ratings NON-INDUCTIVE INDUCTIVE DIRECT CURRENT Heater Load Lamp Load (Tungsten) Motor, Relay, or Solenoid Load DIRECT CURRENT Normally Open Contact Normally Closed Contact Normally Open Contact Normally Closed Contact Normally Open Contact Normally Closed Contact Volts (DC) Amperes Amperes Amperes Amperes Amperes Amperes 6-8 12-14 24-30 110-115 220-230 15 15 6 0.4 0.2 20 20 6 0.4 0.2 1.5 1.5 1.5 0.4 0.2 3 3 3 0.4 0.2 15 10 5 0.05 0.03 20 10 5 0.05 0.03 Table 3. Alternating-Current Service Ratings NON-INDUCTIVE INDUCTIVE ALTERNATING CURRENT Heater Load Lamp Load (Tungsten) Motor, Relay, or Solenoid Load ALTERNATING CURRENT Normally Open Contact Normally Closed Contact Normally Open Contact Normally Closed Contact Normally Open Contact Normally Closed Contact Volts (AC) Amperes Amperes Amperes Amperes Amperes Amperes 110-115 220-250 440-480 20 20 20 20 20 20 2.5 1.25 0.75 3 2.5 1 15 15 2.5 15 15 2.5 Type 304 & 304L 3 Table 4. Assembly Drawing References ACTUATOR TYPE(1) SIZE FIGURE NUMBER 329 350 Series 470 470 470 470 with covered yoke All All 30 40 through 68 80 through 100 80 17 7 8 7 14 8 478 478-16 478-16 513 and 513R 585 and 585R 585C and 585CR 657 and 667 657 and 667 with covered yoke 40 through 68 60 and 68 80 and 100 20 and 32 25, 50, and 100 25 and 50 30 and 34 40 through 70 7 9 14 10 11 12 13 and 15 13 657 and 667 657 and 667 1051, 1052, and 1061 1051 and 1052 1052 40 through 70 80 and 87 30, 40, 60, 68, and 70 33 20 7 and 15 7, 14, & 15 16 18 19 1061 and 1069 1066 and 1066SR 1076 1077 1078 1250 and 1250R Additional field mounting parts 80 and 100 20, 27, and 75 1, 2, and 3 0-, 2-, 6-, 7-, and 9-KE A, AA, and AAA 225, 450, and 675 – – – 17 20 21 22 23 24 25 1. Contact your Fisher Controls sales office or sales representative for information for mounting on actuator types and sizes not listed. Installation When Type 304 and 304L switches are ordered with an actuator, the factory mounts the position switch and adjusts the cams for the travel specified on the order. When installation is complete, the cam adjustments should be checked as described in the adjustment pro- cedures. If the position switch has been ordered separately, or removed for maintenance, refer to the appropriate pro- cedure for mounting. Mounting the Position Switch on the Actuator To mount a Type 304 or 304L position switch on a Fisher Controls actuator in the field, see the additional actuator parts for field mounting section of the parts list. These additional parts, plus those parts listed in the position switch mounting parts section, are re- quired for some actuators. Refer to the appropriate actuator instruction manual for procedures to disassemble and assemble actuator- to-valve connections if required. Figure 2. Typical Nameplate with Hazardous Area Classification Information INFORMATION IN THIS PORTION OF THE NAMEPLATE IDENTIFIES THE HAZARDOUS AREA CLASSIFICATION AND APPROVALS FOR THE PRODUCT SPECIFIED ON THE EQUIPMENT ORDER. 11A4723–K SHT 1 / IL WARNING Avoid personal injury from sudden re- lease of process pressure. Before disas- sembly: � Disconnect any operating lines pro- viding air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve. � Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure from both sides of the valve. Drain the process media from both sides of the valve. � Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment. � Vent the power actuator loading pressure and relieve any actuator spring precompression. � For 304 switches in intrinsically safe areas, current monitoring during opera- Type 304 & 304L 4 Figure 3. Location of Parts for Type 304L Position Switch SWITCH ROLLER ADJUSTMENT ROLLER GEARED NUT CAM CAM EAR GROUND TERMINAL BASE W5940 / IL tion must be with an approved meter for hazardous areas in order to avoid person- al injury or property damage caused by an explosion or fire. WARNING Refer to the appropriate actuator instruction manual before removing the actuator-to-valve connection. Personal injury or property damage may result from sudden release of preloaded spring force. Generally, the position switch is attached to the mounting plate with machine screws, and the mount- ing plate is installed on the actuator. Then, the con- necting linkage or coupling between the actuator and position switch is installed. Refer to table 4 for references to the assembly draw- ing figures that show typical installations of the posi- tion switch. After mechanically connecting the position switch to the actuator, refer to the electrical connections and operating information sections to place the position switch in operation. Mounting the Position Switch on Other Devices For other applications of the position switch, provide suitable mounting hardware. If the motion of the moni- tored device is linear, provide a lever arm to convert the linear motion to rotary motion. The lever arm should be limited to 90 degrees of rotation from the point at which the first switch actuates. This ensures that the first switch remains actuated until the input motion is reversed. If the motion of the monitored device is rotary, the switch can be coupled directly to the device if the rotary motion does not exceed 90 degrees from the point at which the switch first actuates. If the rotary motion of the device is greater than 90 degrees after the first switch actuates, provide a gear and/or lever arm to reduce the rotation to 90 degrees or less. After connecting the switch to the device, refer to the electrical connections and operating information proce- dures to place the position switch in operation.