1 - Line Voltage Select Jumper
2 - Relay #1 LED (marked "Relay 1")
3 - Relay #2 LED (marked "Relay 2")
4 - Transmit/Receive Jumper ("TR/RC")
5 - SecureGround™ Ground Bond Screw
6 - Low Voltage Ground Screw
7 - Security Lockout/Seal Loop
8 - Low Voltage Terminal Block
9 - Temperature Sensing Thermistor
10 - Outside Temperature Indicator LED ("L3")
11 - PLC Signal Indicator LED ("L4")
12 - DIP Switches
13 - PCB Line Voltage Terminal Block
14 - THER Jumpers – Must be ON for all Transceivers
