Rockwell Automation 1791-XXXX ANALOG BLOCK I/O - Manual (Page 30)

Installing Block I/O
Chapter 2
2-12
Table 2.E
Wiring Block Designationsfor Cat. No. 1791ĆNDC
Connections
1791-NDC
Connections
Designation Description Terminal No.
Power Connections
+24 +24V dc Power 1
Power Connections
RET +24 dc Return 3
GND Chassis ground 2 1
Transducer Power 2 +24V For current input only 25
Remote I/O
BLU Blue wire - RIO 6
Remote I/O
Connections CLR Clear wire - RIO 8
SHD Shield - RIO 7
I/O Connections
inV0 thru inV3 Voltage Input 0 through 3 9, 13, 17, 21
Voltage Input RET in0 thru
RET in3
Input Return 0 through 3 10, 14, 18, 22
inI0 thru inI3 Current Input 0 through 3 11, 15, 19, 23
Current Input RET in0 thru
RET in3
Input Return 0 through 3 10, 14, 18, 22
Input Ground GNDin0-GNDin3 Channels 0-3 ground 12, 16, 20, 24 3
Output
out 0 - RET out
0
Output 0 (+)
Return output 0 (-)
27
26 4
Output
out 1 - RET out
1
Output 1 (+)
Return output 1 (-)
29
28 4
Not used
For internal test only; not
for customer use.
4, 5, 30
1 Connect chassis ground to equipment grounding stud. These are not internally connected.
2 20Ć28V dc (nominal 24V, 100mA) voltage source for accommodating loopĆpowered current transducer inputs.
3 Terminals 12, 16, 20, and 24 are internally connected.
4 Terminals 26 and 28 internally connected together.
Table 2.F
Acceptable Wiring Cables for Block I/O Connection
Use Cable Type
Remote I/O link Belden 9463
Input and output wiring Up to 14AWG (2mm 2 ) stranded with 3/64 inch insulation