© National Instruments Corp. 3 FP-RLY-420
Field WiringThe terminal base has connections for each of the eight relay
channels and an external supply to power field devices. Each relay
channel of the FP-RLY-420 has two terminals: N.O. (Normally
Open) and I.C. (Isolated Common). The external supply is not
needed for the internal operation of the FP-RLY-420; however,
youmay connect an external supply to power field devices by
connecting to the V and C terminals of the terminal base. If you
connect an external supply to the V and C terminals, the total
current supplied cannot exceed 6 A.
Table1 lists the terminal assignments for the signals of each
channel.
Table 1. Terminal Assignments
Chan-
nel
Terminal Numbers
N.O. I.C. Vsup COM
0 1 2 17 18
1 3 4 19 20
2 5 6 21 22
3 7 8 23 24
4 9 10 25 26
511 12 27 28
613 14 29 30
715 16 31 32