When using a SmartLinx card with the EnviroRanger (Rack or Panel) all wiring is made to the EnviroRanger terminal board. The DeviceNet connections map to the EnviroRanger terminal board as shown: EnviroRanger ERS 500 (Rack or Panel Mount Operation Page 8 SmartLinx DeviceNet – Instruction Manual 7ML19981BH02 DeviceNet ERS Rack or Panel CAN Low (blue) 66 CAN HIGH (white) 68 V- BUS (black) 69 V+ BUS (red) 71 SHLLD (bare) 73