How to Symbol Program with Allen Bradley RS Logix 500- Part III
Sunday, 5 April 2009
NFPA 79 2002 Edition reference
Table E.1 Device and Component Designations ABE Alarm or Annunciator Bell ABU Alarm or Annunciator Buzzer AH Alarm or Annunciator Horn AM Ammeter AT Autotransformer CAP Capacitor CB Circuit Breaker CI Circuit Interrupter CNC Computerized Numerical Controller CON Contractor COs Cable-Operated (Emergency) Switch CPU Central Processing Unit CR Control Relay CRA Control Relay, Automatic CRH Control Relay, Manual CRL Control Relay, Latch CRM Control Relay, Master CRT Cathode Ray Tube, Monitor or Video Display Unit CRU Control Relay, Unlatch CS Cam Switch CT Current Transformer CTR Counter D Diode DISC Disconnect Switch DISP Display DR Drive EMO Emergency (Machine) Off Device END Encoder ESTOP Emergency Stop FLD Field FLS Flow Switch FS Float Switch FTS Foot Switch FU Fuse GEN Generator GRD, GND Ground GUI Graphical User Interface HM Hour Meter HTR Heating Element IC Integrated Circuit INST Instrument IOL Instantaneous Overload I/O Input/Output Device L Inductor LED Light Emitting Diode LS Limit Switch LT Pilot Light LVDT Linear Variable Differential Transformer M Motor Starter MD Motion Detector MF Motor Starter - Forward MG Motor Generator MR Motor Starter - Reverse MTR Motor OIT Operator Interface Terminal OL Overload Relay PB Pushbutton PBL Pushbutton, Illuminated PC Personal Computer PCB Printed Circuit Board PEC Photoelectric Device PL Plug PLC Programmable Logic Controller POT Potentiometer PRS Proximity Switch PS Pressure Switch PWS Power Supply Q Transistor QTM Thermistor REC Rectifier RECP Receptacle RES Resistor RH Rheostat S Switch SCR Silicon Controlled Rectifier SOL Solenoid SNSR Sensor SS Selector Switch SSL Selector Switch, Illuminated SSR Solid State Relay ST Saturable Transformer SUP Suppressor SYN Synchro or Resolver T Transformer TACH Tachometer Generator TAS Temperature-Actuated Switch TB Terminal Block T/C Thermocouple TR Timer Relay TSDR Transducer TWS Thumbwheel Switch V Electronic Tube VAR Varistor VM Voltmeter VR Voltage Regulator VS Vacuum Switch WLT Worklight WM Wattmeter X Reactor ZSS Zero Speed Switch
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