Allen-Bradley 1769-IA8I Digital AC Input Module
The Allen-Bradley 1769-IA8I, also cataloged as the 1769-IA8I Digital Input Module, operates as a dedicated hardware component for isolated 120 VAC discrete signal processing within Allen-Bradley CompactLogix platforms.
Suffix Breakdown & Model Matrix
- 1769: Compact I/O hardware platform designation for CompactLogix and MicroLogix 1500 system compatibility.
- IA8: 8-channel 120 VAC discrete input functional designation.
- I: Channel-to-channel individually isolated hardware configuration code.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-IA8I |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.5 kg |
| Dimensions | Standard 1769 Compact I/O single-slot width |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 100 mA at 5.1 VDC (backplane bus load) |
| Input Voltage Range | 79 to 132 VAC (47 to 63 Hz) |
| Number of Inputs | 8 individually isolated channels |
| Isolation Voltage | 265 VAC continuous channel-to-channel and channel-to-bus |
| System Compatibility | CompactLogix 1769 controller sub-racks |
Backplane Bus Communication and Deterministic I/O
The Allen-Bradley 1769-IA8I module utilizes high-speed backplane bus communication velocity to pass discrete input status directly to CompactLogix controllers. Designed for EtherNet/IP deterministic networks, the module provides individual channel-to-channel galvanic isolation to eliminate crosstalk and common-mode noise across industrial AC input circuits. Configurable I/O density scaling and firmware flash compatibility enable seamless module integration, fault diagnostics, and deterministic cyclic data transfer in Studio 5000 environment configurations.
Frequently Asked Questions
Q: What is the maximum allowable distance rating for mounting the 1769-IA8I relative to the CompactLogix power supply?
A: The module has a power supply distance rating of 5, meaning it must be installed within 5 module slots of a 1769 Compact I/O power supply module.
Q: How does channel-to-channel isolation benefit field wiring on the 1769-IA8I?
A: Individual channel-to-channel isolation allows each input channel to receive signals from separate AC power sources or different phases without cross-channel electrical interference.
Field Installation Guidelines
- Isolate all main AC power sources and backplane power before inserting or removing the 1769-IA8I module from the DIN rail assembly.
- Verify that the module is positioned within 5 slots of the system power supply to comply with backplane bus distance rating rules.
- Wire individual 120 VAC input signals to the removable terminal block (RTB), ensuring correct terminal torque specification.
- Separate low-voltage DC communication cables from 120 VAC field signal wiring within panel wire raceways.
- Lock adjacent module DIN rail latches securely to maintain continuous backplane bus pin alignment and chassis grounding.
Allen-Bradley 1769-IA8I Digital AC Input Module
Allen-Bradley 1769-IA8I Digital AC Input Module
The Allen-Bradley 1769-IA8I, also cataloged as the 1769-IA8I Digital Input Module, operates as a dedicated hardware component for isolated 120 VAC discrete signal processing within Allen-Bradley CompactLogix platforms.
Suffix Breakdown & Model Matrix
- 1769: Compact I/O hardware platform designation for CompactLogix and MicroLogix 1500 system compatibility.
- IA8: 8-channel 120 VAC discrete input functional designation.
- I: Channel-to-channel individually isolated hardware configuration code.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-IA8I |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.5 kg |
| Dimensions | Standard 1769 Compact I/O single-slot width |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 100 mA at 5.1 VDC (backplane bus load) |
| Input Voltage Range | 79 to 132 VAC (47 to 63 Hz) |
| Number of Inputs | 8 individually isolated channels |
| Isolation Voltage | 265 VAC continuous channel-to-channel and channel-to-bus |
| System Compatibility | CompactLogix 1769 controller sub-racks |
Backplane Bus Communication and Deterministic I/O
The Allen-Bradley 1769-IA8I module utilizes high-speed backplane bus communication velocity to pass discrete input status directly to CompactLogix controllers. Designed for EtherNet/IP deterministic networks, the module provides individual channel-to-channel galvanic isolation to eliminate crosstalk and common-mode noise across industrial AC input circuits. Configurable I/O density scaling and firmware flash compatibility enable seamless module integration, fault diagnostics, and deterministic cyclic data transfer in Studio 5000 environment configurations.
Frequently Asked Questions
Q: What is the maximum allowable distance rating for mounting the 1769-IA8I relative to the CompactLogix power supply?
A: The module has a power supply distance rating of 5, meaning it must be installed within 5 module slots of a 1769 Compact I/O power supply module.
Q: How does channel-to-channel isolation benefit field wiring on the 1769-IA8I?
A: Individual channel-to-channel isolation allows each input channel to receive signals from separate AC power sources or different phases without cross-channel electrical interference.
Field Installation Guidelines
- Isolate all main AC power sources and backplane power before inserting or removing the 1769-IA8I module from the DIN rail assembly.
- Verify that the module is positioned within 5 slots of the system power supply to comply with backplane bus distance rating rules.
- Wire individual 120 VAC input signals to the removable terminal block (RTB), ensuring correct terminal torque specification.
- Separate low-voltage DC communication cables from 120 VAC field signal wiring within panel wire raceways.
- Lock adjacent module DIN rail latches securely to maintain continuous backplane bus pin alignment and chassis grounding.
