The 1756-IM16I from Allen‑Bradley delivers 16 individually isolated AC inputs. It operates from 159V to 265V AC, making it suitable for 240V AC systems. Each channel is isolated from the others, which reduces crosstalk and improves reliability in noisy environments. You can also program the input delay time to match your application needs.
This module belongs to the ControlLogix family. Its input voltage range is 159–265V AC, 47–63 Hz. The off‑state maximum current is only 2.5 mA, while the on‑state current ranges from 5 mA (at 159V) to 13 mA (at 265V).
Additionally, the input delay time is programmable. From off to on, the hardware delay is 10 ms max plus a user‑selectable filter time of 1 or 2 ms. From on to off, the hardware delay is 8 ms max plus a filter time of 9 or 18 ms.
Furthermore, the 1756-IM16I draws 100 mA from the 5V backplane and 3 mA from the 24V backplane. Total backplane power is only 0.58 W. Maximum power dissipation reaches 5.8 W at 60°C, with thermal dissipation of 19.78 BTU/hour.
The module operates from 0°C to 60°C (32°F to 140°F) with all channels on at reduced voltage. For example, at 60°C with all channels on, the voltage range is 159–242V AC. It also withstands 5 g vibration and 30 g shock. Storage temperature ranges from -40°C to 85°C.
You must install the 1756-IM16I into any slot of a ControlLogix chassis. It requires either the 1756-TBCH or 1756-TBS6H 36‑pin removable terminal block (RTB). First, disconnect power before installing or removing the module. Next, insert the module into the chassis and tighten the screws. Then, wire the field devices to the RTB according to the pinout diagram. Finally, attach the RTB to the module and secure it.
1756-IM16I module (1 unit)
Removable terminal block (RTB) – 1756-TBCH or 1756-TBS6H (1 unit, depending on order)
User manual (quick start guide)
Plastic dust cover
Note: No certificate or warranty document is included in the package.
We ship worldwide via FedEx, UPS, or DHL. Tracking number provided within 24 hours after dispatch.
1. Can I use the 1756-IM16I with 110V AC?
No. The 1756-IM16I requires a minimum of 159V AC. For 110V AC applications, consider the 1756-IA16I or 1756-IA8I instead.
2. What RTB is compatible with this module?
Only the 1756-TBCH and 1756-TBS6H 36‑pin RTBs work with the 1756-IM16I. Standard 20‑pin RTBs are not compatible.
3. How do I change the input filter time?
You can program the filter time via the ControlLogix controller’s I/O configuration in Studio 5000. Options are 1 ms or 2 ms for off‑to‑on, and 9 ms or 18 ms for on‑to‑off.
4. What happens if I exceed the maximum input voltage?
Applying more than 265V AC can permanently damage the 1756-IM16I. The maximum inrush current is 250 mA, but sustained overvoltage will cause failure.
5. Is the module hot‑swappable?
Yes, the ControlLogix chassis supports hot swapping. However, always verify that the RTB wiring is correct before inserting the 1756-IM16I into a live backplane.
| Brand Name | Allen-Bradley |
| Model No. | 1756-IM16I |
| Product Type | Digital Input Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
