| Specifications | 1746-IO4 | 1746-IO8 | 1746-IO12 | 1746-IO12DC |
| Number of inputs | 2 | 4 | 6 | 6 |
| Number of outputs | 2 | 4 | 6 | 6 |
| Points per common | 2 | 4 | 6 | 6 |
| Voltage category | 120V AC (inputs)
100/120V AC (relay contact outputs) | 120V AC (inputs)
100/120V AC (relay contact outputs) | 120V AC (inputs)
100/120V AC (relay contact outputs) | 10
30V DC (inputs)
5
265V AC @ 47
63 Hz /
5
125V DC (outputs) |
| Operating voltage range | 85
132V AC @ 47
63 Hz (inputs)
5
265V AC @ 47
63 Hz / 5
125V DC (outputs) | 85
132V AC @ 47
63 Hz (inputs)
5
265V AC @ 47
63 Hz / 5
125V DC (outputs) | 85
132V AC @ 47
63 Hz (inputs)
5
265V AC @ 47
63 Hz / 5
125V DC (outputs) | 10
30V DC (inputs)
5
265V AC @ 47
63 Hz /
5
125V DC (outputs) |
| Backplane current (mA) @ 5V | 30 mA | 60 mA | 90 mA | 80 mA |
| Backplane current (mA) @ 24V | 25 mA | 45 mA | 70 mA | 60 mA |
| Continuous current per point | See Relay Contact Ratings for 1746-OW4 on
page 16 | See Relay Contact Ratings for 1746-OW4 on
page 16 | See Relay Contact Ratings for 1746-OW16 on page 16 | See Relay Contact Ratings for 1746-OW16 on page 16 |
| Continuous current per module | 4 A | 8 A | 8 A | 8 A |
