8 CH Programmable RS485 Serial Port Relay Board Home Lighting Control Module #dd

8 CH Programmable RS485 Serial Port Relay Board Home Lighting Control Module *bh

8 CH Programmable RS485 Serial Port Relay Board Home Lighting Control Module *ib

HF6508 8-Ports I/O Controller 8DI 8DO IoT RS485 Serial Server to Ethernet DTU *r

MOXA 4 Port PCIe RS232, RS422, RS485 Serial Card

Novus DigiRail 2R Dual Relay Output Modbus RS485 DIN Rail Module

1PC Used PCL-745B REV.B1 port RS422/485 ISA serial card *yu

Advantech Serial device server 4-port RS-232/422/485 EKI-1524 -used-