Relays

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The IB1005 + SB1005 have 6 mechanical relays. These relays are rated for 30VDC/16A or 250VAC/15A. If your load is inductive in nature, then the actual power the relays can handle may be several times lower.

Relay outputs

Relay outputs are on terminal blocks 3 and 4. Both normally closed and normally opened lines are provided for each relay.

For terminal block 3:

Terminal #

Function

9

Relay 3, normally closed line

8

Relay 3, normally opened line

7

Relay 3, common line

6

Relay 2, normally closed line

5

Relay 2, normally opened line

4

Relay 2, common line

3

Relay 1, normally closed line

2

Relay 1, normally opened line

1

Relay 1, common line

 

For terminal block 4:

Terminal #

Function

9

Relay 6, normally closed line

8

Relay 6, normally opened line

7

Relay 6, common line

6

Relay 5, normally closed line

5

Relay 5, normally opened line

4

Relay 5, common line

3

Relay 4, normally closed line

2

Relay 4, normally opened line

1

Relay 4, common line

Relay control

Six lines of the EM1000 (located on the NB10x0 network board) control the relays. On power up, all EM1000 lines are configured as inputs and pulled up internally, keeping relays off. To turn the relay on, set the corresponding control line LOW. Naturally, each relay line must be configured as output.

 

For all relay control lines:

HIGH (our input*) - relay off

LOW - relay on

Line

Function

Corresponding

EM1000 I/O

IC1000 cable line

RELAY1 (output)

Relay 1 control

GPIO32

30

RELAY2 (output)

Relay 2 control

GPIO33

28

RELAY3 (output)

Relay 3 control

GPIO34

26

RELAY4 (output)

Relay 4 control

GPIO35

24

RELAY5 (output)

Relay 5 control

GPIO36

22

RELAY6 (output)

Relay 6 control

GPIO37

20

*GPIO line configured as input (default state)