| Cat. No | Inputs/Outputs | Voltage Category | Operating Voltage Range | Removable Terminal Block |
| 1756-IB16 | 16 inputs
(8 points/group) | 12/24V DC sink | 10
31.2V DC | 1756-TBNH
1756-TBSH |
| 1756-IB16XT | 16 inputs
(8 points/group) | 12/24V DC sink | 10
31.2V DC | 1756-TBNHXT
1756-TBSHXT |
| 1756-IB16D | 16 diagnostic inputs
(4 points/group) | 12/24V DC sink | 10
30V DC | 1756-TBCH
1756-TBS6H |
| 1756-IB16I | 16 individually isolated inputs | 12/24V DC sink/source | 10
30V DC | 1756-TBCH
1756-TBS6H |
| 1756-IB16IF | 16 high-speed, individually isolated inputs | 12/24V DC sink/source | 10
30V DC | 1756-TBCH
1756-TBS6H |
| 1756-IB16ISOE | 16 individually isolated, sequence of events inputs | 24/48V DC sink/source | 10
55V DC | 1756-TBCH
1756-TBS6H |
| 1756-IB32 | 32 inputs
(16 points/group) | 12/24V DC sink | 10
31.2V DC | 1756-TBCH
1756-TBS6H |
| 1756-IB32XT | 32 inputs
(16 points/group) | 12/24V DC sink | 10
31.2V DC | 1756-TBCHXT
1756-TBS6HXT |
| 1756-IC16 | 16 inputs
(8 points/group) | 48V DC sink | 30
55V DC @ 60 °C (140 °F)
30
60V DC @ 55 °C (131 °F) | 1756-TBNH
1756-TBSH |
| 1756-IG16 | 16 inputs
(8 points/group) | 5V DC TTL source
(Low = True) | 4.5
5.5V DC | 1756-TBNH
1756-TBSH |
| 1756-IH16I | 16 individually isolated inputs | 125V DC sink/source | 90
146V DC | 1756-TBCH
1756-TBS6H |
| 1756-IH16ISOE | 16 individually isolated, sequence of events inputs | 125V DC sink/source | 90
140V DC | 1756-TBCH
1756-TBS6H |
| 1756-IV16 | 16 inputs
(8 points/group) | 12/24V DC source | 10
30V DC | 1756-TBNH
1756-TBSH |
| 1756-IV32 | 32 inputs
(16 points/group) | 12/24V DC source | 10
30V DC | 1756-TBCH
1756-TBS6H |
