Relays

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)