The Allen-Bradley 1757-SRC1 is a high-performance safety relay module engineered for the ControlLogix platform, providing redundant, fail-safe output control in critical process and machinery safety loops. This module is designed to meet stringent international safety standards, including IEC 61508 SIL 3 and ISO 13849 PLe, making it ideal for emergency stop, light curtain, and interlock systems. With dual-channel architecture and built-in self-diagnostics, the 1757-SRC1 ensures maximum integrity even in the most demanding applications. Its hot-swappable capability allows for seamless replacement without system shutdown, while the compact form factor fits into standard 1756 chassis. Backed by Rockwell Automation’s rigorous testing, this module delivers reliable performance for years of continuous operation.
| Parameter |
Specification |
| Product Type |
Safety Relay Output Module |
| Model Number |
1757-SRC1 |
| Platform |
ControlLogix (1756 Series) |
| Number of Output Channels |
2 (Dual-channel, redundant) |
| Output Configuration |
Form A (Normally Open) – Safety-rated |
| Maximum Switching Voltage |
250V AC / 250V DC |
| Maximum Switching Current |
2 A per channel (resistive load) |
| Safety Integrity Level (SIL) |
SIL 3 per IEC 61508 |
| Performance Level (PL) |
PLe per ISO 13849-1 |
| Category (ISO 13849) |
Category 4 |
| Response Time |
≤ 20 ms (typical) |
| Isolation Voltage |
250V AC/DC (channel-to-channel and channel-to-backplane) |
| Backplane Current Draw |
150 mA at 5.1V DC |
| Power Dissipation |
3.5 W (maximum) |
| Operating Temperature |
0°C to +60°C (32°F to 140°F) |
| Storage Temperature |
-40°C to +85°C (-40°F to 185°F) |
| Relative Humidity |
5% to 95% non-condensing |
| Vibration Resistance |
5 g, 10–500 Hz (operating) |
| Shock Resistance |
30 g, 11 ms half-sine |
| Module Keying |
Electronic keying (compatible with 1756 chassis) |
| LED Indicators |
Module Status, Channel Status (per channel), Fault |
| Diagnostics |
Backplane communication, internal self-test, output monitoring |
| Certifications |
CE, cULus, ATEX (for hazardous locations), TÜV Rheinland (functional safety) |
| Weight |
Approx. 0.35 kg (0.77 lb) |
| Dimensions (H x W x D) |
144 mm x 35 mm x 110 mm (5.67 in x 1.38 in x 4.33 in) |
| Wiring |
Removable terminal block (spring-clamp or screw-type) |
| Warranty |
Standard 2-year manufacturer warranty (extended options available) |
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