Allen-Bradley 1756-IB16 ControlLogix Digital Input Module
The Allen-Bradley 1756-IB16, also cataloged as the 1756-IB16 Digital Input Module, operates as a dedicated hardware component for discrete DC signal acquisition within ControlLogix 1756 chassis platforms. It conditions and optically isolates binary state signals from field devices, converting 12/24 VDC sinking inputs into deterministic data packets transmitted across the backplane bus.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-IB16 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.00 lbs (0.45 kg) |
| Dimensions | Standard ControlLogix single-slot form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | Total backplane power 0.56 W |
| Backplane Current Draw | 100 mA at 5.1 VDC, 2 mA at 24 VDC |
| Number of Inputs | 16 discrete sinking inputs (2 groups of 8) |
| Voltage Category | 12/24 VDC sinking |
| Operating Voltage Range | 10 to 31.2 VDC |
| Thermal Dissipation | 17.39 BTU per hour (Max power dissipation 5.1 W at 60 deg C) |
Backplane Bus Velocity & Deterministic Network Execution
The 1756-IB16 integrates direct connection to the ControlLogix high-speed backplane bus communication velocity, supporting producer/consumer data broadcasting across EtherNet/IP deterministic networks. Each of the 16 sinking input channels utilizes optical isolation to decouple field-side voltage swings from backplane logic networks. Onboard firmware features configurable Cyclic Redundancy Check (CRC) verification, user-definable Real-Time Sampling (RTS) periods, and programmable input filter times to optimize signal integrity across high-density I/O chassis layouts.
Frequently Asked Questions
Q: Can the 1756-IB16 module be installed or removed while the ControlLogix chassis is under power?
A: Yes, the 1756-IB16 supports Removal and Insertion Under Power (RIUP), allowing field engineers to replace the module without disturbing chassis backplane bus communication velocity or adjacent operational modules.
Q: What removable terminal block (RTB) options are compatible with the 1756-IB16?
A: The module requires a 20-pin Removable Terminal Block, specifically the 1756-TBCH (cage clamp) or 1756-TBNH (spring clamp), which must be ordered separately.
Field Installation Guidelines
- Chassis Insertion & Mechanical Alignment: Align the module circuit board with the top and bottom chassis guide rails of the target slot. Slide the module firmly into the chassis backplane connector until the top and bottom module tabs snap securely into place.
- Removable Terminal Block (RTB) Wiring: Wire field inputs to the 20-pin RTB using conductors within the 0.33 to 2.1 sq mm (22 to 14 AWG) gauge range. Ensure signal wiring is routed separately from AC power lines to minimize induced noise.
- Shielding & Grounding: Terminate all field cable drain wires to the central enclosure ground bus bar. Verify that the ControlLogix chassis is connected directly to protective earth (PE) using a heavy-gauge copper braid to guarantee proper functioning of internal noise suppression circuitry.
Allen-Bradley 1756-IB16 ControlLogix Digital Input Module
Allen-Bradley 1756-IB16 ControlLogix Digital Input Module
The Allen-Bradley 1756-IB16, also cataloged as the 1756-IB16 Digital Input Module, operates as a dedicated hardware component for discrete DC signal acquisition within ControlLogix 1756 chassis platforms. It conditions and optically isolates binary state signals from field devices, converting 12/24 VDC sinking inputs into deterministic data packets transmitted across the backplane bus.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-IB16 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.00 lbs (0.45 kg) |
| Dimensions | Standard ControlLogix single-slot form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | Total backplane power 0.56 W |
| Backplane Current Draw | 100 mA at 5.1 VDC, 2 mA at 24 VDC |
| Number of Inputs | 16 discrete sinking inputs (2 groups of 8) |
| Voltage Category | 12/24 VDC sinking |
| Operating Voltage Range | 10 to 31.2 VDC |
| Thermal Dissipation | 17.39 BTU per hour (Max power dissipation 5.1 W at 60 deg C) |
Backplane Bus Velocity & Deterministic Network Execution
The 1756-IB16 integrates direct connection to the ControlLogix high-speed backplane bus communication velocity, supporting producer/consumer data broadcasting across EtherNet/IP deterministic networks. Each of the 16 sinking input channels utilizes optical isolation to decouple field-side voltage swings from backplane logic networks. Onboard firmware features configurable Cyclic Redundancy Check (CRC) verification, user-definable Real-Time Sampling (RTS) periods, and programmable input filter times to optimize signal integrity across high-density I/O chassis layouts.
Frequently Asked Questions
Q: Can the 1756-IB16 module be installed or removed while the ControlLogix chassis is under power?
A: Yes, the 1756-IB16 supports Removal and Insertion Under Power (RIUP), allowing field engineers to replace the module without disturbing chassis backplane bus communication velocity or adjacent operational modules.
Q: What removable terminal block (RTB) options are compatible with the 1756-IB16?
A: The module requires a 20-pin Removable Terminal Block, specifically the 1756-TBCH (cage clamp) or 1756-TBNH (spring clamp), which must be ordered separately.
Field Installation Guidelines
- Chassis Insertion & Mechanical Alignment: Align the module circuit board with the top and bottom chassis guide rails of the target slot. Slide the module firmly into the chassis backplane connector until the top and bottom module tabs snap securely into place.
- Removable Terminal Block (RTB) Wiring: Wire field inputs to the 20-pin RTB using conductors within the 0.33 to 2.1 sq mm (22 to 14 AWG) gauge range. Ensure signal wiring is routed separately from AC power lines to minimize induced noise.
- Shielding & Grounding: Terminate all field cable drain wires to the central enclosure ground bus bar. Verify that the ControlLogix chassis is connected directly to protective earth (PE) using a heavy-gauge copper braid to guarantee proper functioning of internal noise suppression circuitry.
