The 1756-RIO ALLEN-BRADLEY Remote I/O Scanner Module is a critical interface for bridging modern ControlLogix controllers with legacy remote I/O networks. Designed to replace older 1771-SDN scanner modules, this unit provides deterministic, real-time data exchange with Allen-Bradley 1771 I/O chassis, PLC-5, and SLC-500 systems. It supports up to 32 logical racks (each with 8 I/O groups) for a total of 256 I/O words, making it ideal for large-scale distributed control applications in power generation, oil & gas, and automotive assembly lines. The module operates over a single coaxial cable at 57.6 kbps or 115.2 kbps, with automatic baud rate detection for plug-and-play setup. Its embedded diagnostics via ControlLogix backplane status indicators simplify troubleshooting, while the onboard firmware supports advanced features like block transfer reads/writes and remote rack fault reporting. Each unit is rigorously tested to meet UL, CE, and CSA safety certifications, ensuring reliable performance in continuous-duty processes.
| Parameter |
Specification |
| Product Type |
Remote I/O Scanner Module |
| Compatible Platforms |
ControlLogix 1756 chassis (all revisions) |
| Maximum Remote I/O Racks Supported |
32 logical racks (256 I/O groups total) |
| Communication Protocol |
Allen-Bradley Remote I/O (RIO) – single coaxial cable |
| Data Transfer Rate |
57.6 kbps or 115.2 kbps (auto-negotiating) |
| I/O Capacity per Rack |
Up to 8 input words and 8 output words (16-bit) |
| Block Transfer Support |
Yes – up to 64 words per block transfer read/write |
| Backplane Interface |
ControlLogix 1756 backplane – 5V DC logic |
| Power Consumption |
1.2 A at 5.1 VDC (typical) |
| Operating Temperature |
-20°C to +60°C (-4°F to +140°F) |
| Storage Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Relative Humidity |
5% to 95% non-condensing |
| Shock Resistance |
30 g peak acceleration (11 ms duration) |
| Vibration Resistance |
5 g Standard Models 10-500 Hz |
| LED Indicators |
Backplane OK, RIO Active, RIO Fault, Module Status, Network Status |
| Connector Type |
BNC coaxial (female) for RIO cable; 36-pin backplane connector |
| Maximum Cable Length |
3,048 m (10,000 ft) at 57.6 kbps; 1,524 m (5,000 ft) at 115.2 kbps |
| Firmware Upgrade |
Via ControlLogix backplane using ControlFlash software |
| Certifications |
UL 508, CSA C22.2 No. 142, CE (EN 61000-6-2, EN 61000-6-4) |
| Weight |
0.45 kg (1.0 lb) |
| Dimensions (H x W x D) |
14.0 cm x 5.3 cm x 12.7 cm (5.5 in x 2.1 in x 5.0 in) |
| Warranty |
1 year against manufacturing defects |
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