Справочник Пользователя для National Instruments FP-RLY-420

© National Instruments Corp.

The 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, 
you may 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.

Table 1 lists the terminal assignments for the signals of each 
channel.

Table 1.  Terminal Assignments

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

5

11

12

27

28

6

13

14

29

30

7

15

16

31

32