Measurement Computing SWITCH AND SENSE 8/8 - Manual (Page 14)

Switch & Sense 8/8 User's Guide Functional Details
3-3
Main connector and pin out
Table 3-2. Connector specifications
Connector type Screw terminal
Wire gauge range 12 AWG to 20 AWG
Table 3-3. Screw terminal pin out
Pin Signal Name Pin Signal Name
IP0A Input 0 terminal A IP4A Input 4 terminal A
IP0B Input 0 terminal B IP4B Input 4 terminal B
IP1A Input 1 terminal A IP5A Input 5 terminal A
IP1B Input 1 terminal B IP5B Input 5 terminal B
IP2A Input 2 terminal A IP6A Input 6 terminal A
IP2B Input 2 terminal B IP6B Input 6 terminal B
IP3A Input 3 terminal A IP7A Input 7 terminal A
IP3B Input 3 terminal B IP7B Input 7 terminal B
0-NO Relay 0 Normally Open contact 4-NO Relay 4 Normally Open contact
0-C Relay 0 Common contact 4-C Relay 4 Common contact
0-NC Relay 0 Normally Closed contact 4-NC Relay 4 Normally Closed contact
1-NO Relay 1 Normally Open contact 5-NO Relay 5 Normally Open contact
1-C Relay 1 Common contact 5-C Relay 5 Common contact
1-NC Relay 1 Normally Closed contact 5-NC Relay 5 Normally Closed contact
2-NO Relay 2 Normally Open contact 6-NO Relay 6 Normally Open contact
2-C Relay 2 Common contact 6-C Relay 6 Common contact
2-NC Relay 2 Normally Closed contact 6-NC Relay 6 Normally Closed contact
3-NO Relay 3 Normally Open contact 7-NO Relay 7 Normally Open contact
3-C Relay 3 Common contact 7-C Relay 7 Common contact
3-NC Relay 3 Normally Closed contact 7-NC Relay 7 Normally Closed contact
Relay contact terminals (NO, C, NC (0) to NO, C, NC (7))
The two outer groups of 12 screw terminals shown in Figure 3-2 connect to the normally open (NO), common
(C), and normally closed (NC) contacts for relays 0 through 7.
Form C relay output
A schematic for Form C relay contacts is shown in Figure 3-3. The Form C relay has a C, NO, and NC contact.
Figure 3-3. Form C SPDT relay
! When a (0) is written to the output bit, the C and NC are in contact.
! When a (1) is written to the output bit, the C and NO are in contact.
At power-up, the relays are put into a non-energized state (NC in contact to Common).