621-9938R Honeywell - Serial I/O Module Control Memory Xchange Module Data input: Four words of

Data input: Four words of analog output from CPU or NIU

0 to 10 V (15 bit)

Isolation Voltage: 250V continuous (outputs-to-backplane

Allowable Capacitive Load: 20 nF max

Backplane connector: 1 (short edge)

621-9938R Honeywell - Serial I/O Module Control Memory Xchange Module Data input: Four words ofOverview Honeywell 621 9938R is a Serial I O Module (SIOM) used in redundant serial I O configurations, installed in slot N of the remote Serial I O card file. It controls the serial I O card file and interfaces with the 621 9939 SLM in the processor card file. Specifications Model: 621 9938R Type: Serial I O Module Application: Redundant or nonredundant serial I O configurations Communication Ports: Dual ports for redundant serial I O lines