The ALLEN-BRADLEY 1771-A1B is a 4-slot I/O chassis assembly designed for the PLC-5 family, providing a modular and scalable platform for industrial automation. This back-panel mount unit integrates seamlessly with 1771 series I/O modules, offering a robust solution for discrete and analog control applications in manufacturing, process, and material handling systems. The 1771-A1B chassis ensures efficient signal routing and power distribution, with a rugged metal enclosure that withstands vibration, temperature extremes, and electrical noise. Its compact form factor allows for space-saving installation in control panels, while the backplane supports high-speed data exchange between the processor and I/O modules. Ideal for expanding system capacity or replacing legacy components, the 1771-A1B maintains backward compatibility with existing PLC-5 installations and is a cost-effective choice for modernizing automation infrastructure.
| Parameter |
Specification |
| Part Number |
1771-A1B |
| Product Type |
PLC-5 I/O Chassis Assembly |
| Number of Slots |
4 |
| Mounting Style |
Back-Panel Mount |
| Compatible Processors |
ALLEN-BRADLEY PLC-5 Series (e.g., 1771-Pxxx, 1771-xxx) |
| Compatible I/O Modules |
ALLEN-BRADLEY 1771 Series Discrete, Analog, and Specialty Modules |
| Backplane Data Rate |
Up to 1.5 Mbps (PLC-5 Standard) |
| Power Supply Input |
Via Backplane from 1771-Pxxx Power Supply (Typical 120/240VAC or 24VDC) |
| Current Rating (Backplane) |
5A at 5VDC, 3A at 24VDC (Max per Slot) |
| Operating Temperature |
0°C to 60°C (32°F to 140°F) |
| Storage Temperature |
-40°C to 85°C (-40°F to 185°F) |
| Humidity Range |
5% to 95% Non-Condensing |
| Vibration Resistance |
5g Standard Models 10-500 Hz |
| Shock Resistance |
30g (11ms Half-Sine) |
| Enclosure Material |
Steel with Corrosion-Resistant Coating |
| Weight |
Approximately 2.5 kg (5.5 lbs) |
| Dimensions (H x W x D) |
120 mm x 200 mm x 150 mm (4.72 in x 7.87 in x 5.91 in) |
| Certifications |
UL Listed, CSA Certified, CE Marked, NEMA ICS |
| Protection Class |
IP20 (Indoor Use Only) |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22