DocumentsExpansion Modules Installation Guide Related Products Quick view CAN-01 $292.74 MSRP: $410.00 Communication module Quick view RS232-01 $136.44 MSRP: $180.00 Communication module Quick view RS485-01 $181.92 MSRP: $240.00 Communication module Quick view CDPl-01 $79.20 MSRP: $99.00 Communication adapter module Quick view CAN/RS485-01 $363.84 MSRP: $480.00 Communication Module