3.4 CIO-ERB24 & SSR-RACK24 CONNECTIONS
PCI-DIO96 boards provide digital I/O in two major groups of 48 bits each (96 total, but each side of the C100FF-xx cable provides 48 bits). However, many popular relay and SSR boards provide only 24-bits of I/O. The CIO-ERB24 and SSR-RACK24 each implements a connector scheme where all 96 bits of the PCI-DIO96 board may be used to control relays and/or SSRs. This configuration is shown in Figure 3-4 below. The 24-bits of digital I/O on PCI-DIO96 connector pins 1-24 (base address +0 through +3) control the first relay board. The 24-bits on pins 25-50 will control the second relay/SSR board on the daisy chain and so on up to 100 pins.
| | | PCI-DIO96 | |
| | | C100FF-X Cable | |
IN | | | IN | |
| | CIO-ERB24 | OUT |
CIO-ERB24 | OUT | |
| or | |
or | | |
| | SSR-RACK24 | |
SSR-RACK24 | | | |
| | | |
| IN | | | IN |
CIO-ERB24 | | CIO-ERB24 | OUT |
| OUT |
| or |
or | | |
| | SSR-RACK24 |
SSR-RACK24 | |
| | |
Figure 3-4. Relay Rack Cabling
