Product Overview
The Allen-Bradley 1771-ID01 is a digital AC/DC input module designed for the Rockwell Automation PLC-5 family. It provides six isolated input channels that interface ON/OFF devices such as limit switches, pushbuttons, and float switches to a programmable controller. This module accepts both AC and DC signals, making it versatile for mixed industrial environments.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1771-ID01 |
| Module Type |
Digital AC/DC Input Module |
| Number of Inputs |
6 |
| Voltage Category |
220 Volts AC/DC |
| AC Operating Voltage |
184-276 Volts |
| DC Operating Voltage |
18-276 Volts |
| Backplane Current |
74 mA |
| Max AC Off-State Current |
0.7 mA |
| Max DC Off-State Current |
1.0 mA |
| Typical AC Signal Delay (On) |
20 ±10 ms |
| Typical DC Signal Delay (On) |
10 ±4 ms |
| Typical AC Signal Delay (Off) |
20 ±10 ms |
| Typical DC Signal Delay (Off) |
20 ±9 ms |
| Dimensions |
3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm) |
Key Features & Benefits
-
Wide voltage range: Operates on 184-276V AC and 18-276V DC, accommodating diverse power supplies.
-
Isolated inputs: Each of the six channels provides electrical isolation, protecting the controller from voltage spikes.
-
Compatible with PLC-5 systems: Seamlessly integrates into 1771 I/O chassis and universal I/O structures.
-
CE-marked, UL-listed, and CSA-certified: Meets international safety standards for industrial control equipment.
Industry Applications
This module suits high-power operations that require reliable signal detection. Typical applications include:
- Monitoring limit switches and pushbuttons in automated assembly lines.
- Reading float switches in tank-level control systems.
- Interfacing selector switches in multi-phase motor control panels.
When paired with an AC output module rated 220-240V, the 1771-ID01 can directly drive terminals, simplifying wiring. Use the same AC source for both input and output to ensure proper phasing and avoid module damage.
Installation & Setup
Install the 1771-ID01 into any 1771 I/O chassis slot. Connect field wiring using the included field wiring arm (catalog number 1771-WD). Verify that the backplane current does not exceed 74 mA. For output connections, add an electrocube snubber or a 3.3kΩ 20W resistor between the output terminal and common to suppress transients.
Maintenance & Reliability
Routine inspection of wiring connections and off-state currents helps maintain reliable operation. Periodically check that input devices are within the specified voltage ranges. The module’s isolated design reduces the risk of ground loops, extending service life in demanding environments.
Compatibility & Integration
The 1771-ID01 works with Allen-Bradley PLC-5 programmable controllers and universal I/O structures. It supports both AC and DC input signals, making it a flexible choice for mixed-signal systems. The module draws power from the backplane and communicates with the processor via the 1771 I/O bus.
Buying Guide
Before purchasing, verify your controller’s compatibility and required input voltage. Ensure your chassis has an available slot and sufficient backplane capacity. For expert advice and genuine Allen-Bradley 1771-ID01 modules, trust PLC Source PRO as a reliable supplier.