Honeywell 621-9938 Serial I/O Module (SIOM) I/O Power Supply Module 1756-L72 is an Allen-Bradley ControlLogix

1756-L72 is an Allen-Bradley ControlLogix processor module with 4 MB user memory and enhanced I/O capacity

Data & Monitoring

Connector: 1 10-pin connector for system connection

3300/48-01-01-01-00 is a case expansion monitor designed for precise measurement with configurable relay modules and environmental resilience

32 Green LEDs: Input status

Honeywell 621-9938 Serial I/O Module (SIOM) I/O Power Supply Module 1756-L72 is an Allen-Bradley ControlLogixOverview 621 9938 is a Honeywell Serial I O Module (SIOM) with dual communication ports and front status LED. Functions Slot installation: N Terminating resistors: 200 300 (2 per SIOM at end of link) Communication Ports: 2 (redundant serial I O lines) Optional accessory: 621 9928R SLS Configuration DIP switches: 4 8 position, 1 4 position SW1 address range: 02032 (step 8)