Honeywell 621-9938R Serial I/O Module I/O Communication Module Communication ports: Ethernet

Communication ports: Ethernet

and heavy industrial plants

Precise Output: Provides stable current signals for actuators and indicators

500 V DC between input/output groups

Honeywell 621-9938R Serial I/O Module I/O Communication Module Communication ports: EthernetDescription The Honeywell 621 9938R Serial Input Output Module (SIOM) is a redundant communication unit designed for Honeywell TDC 3000 systems. It manages the serial I O card file and interfaces with the 621 9939 Serial Link Module, ensuring reliable data exchange in mission critical industrial automation. Specifications Manufacturer: Honeywell Model Number: 621 9938R Type: Serial I O Module (SIOM) System Compatibility: Honeywell TDC 3000 ISSC 600