Product Overview
The Allen-Bradley 440R-N23132-A is a compact, DIN-rail mounted safety relay module from Rockwell Automation’s trusted Guardmaster family. Designed to provide reliable safety monitoring for industrial machinery, this specific module is engineered to monitor safety devices such as emergency stop (e-stop) circuits, safety gate switches, and other single- or dual-channel safety contacts. The Allen-Bradley 440R-N23132-A implements a defined safety function, typically a Category 4, Performance Level e (PL e) according to ISO 13849-1 safety circuit, to ensure that when a safety input is activated, the machine’s hazardous motion is brought to a safe and controlled stop. Its primary role is to act as a dedicated safety logic solver for a specific guard or function, providing a monitored, fault-tolerant output to safely disconnect power to a machine’s main contactor or drive enable circuit.As part of the Guardmaster 440R series, the 440R-N23132-A is valued for its simplicity, reliability, and compliance with global machinery safety standards. It is a self-contained unit that continuously monitors the integrity of its input circuits for faults like welded contacts, short circuits, or cross-circuit faults. Upon detecting a valid stop command or a fault condition, the Allen-Bradley 440R-N23132-A de-energizes its safety outputs in a controlled manner and will not allow a restart until the safety input device is reset to its normal state and a manual reset signal is provided. This ensures that machines cannot be restarted inadvertently. Designed for ease of integration, the module features clear status LEDs, plug-in terminal blocks, and a straightforward wiring scheme, making it an essential component for achieving compliant safety circuit design for a wide range of industrial equipment.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 440R-N23132-A |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Series | Guardmaster 440R |
| Product Type | Safety Monitoring Relay |
| Safety Category | Up to Category 4, PL e (when used as directed) |
| Input Channels | Typically 2 or 3 safety input channels (e.g., for dual-channel monitoring with start reset) |
| Input Type | Normally Closed (NC) dry contact signals |
| Supply Voltage | 24V DC (typical for safety circuit control) |
| Safety Outputs | 2 or 3 semiconductor safety outputs (OSSDs – Output Signal Switching Devices) |
| Auxiliary Outputs | At least 1 fault signal output (normally closed) |
| Reset Type | Manual reset (with monitoring) |
| Response Time | Typically < 20ms |
| Maximum Switching Current | 2A per safety output channel (resistive load) |
| Connection | Removable screw terminal blocks |
| Status Indication | LED indicators for Power, Output Status, Fault, and Reset |
| Certifications | UL Listed, cULus, CE, TÜV (to relevant standards) |
Main Features and Advantages
The Allen-Bradley 440R-N23132-A is distinguished by its robust safety architecture and user-friendly design. Its core advantage is the provision of a validated safety circuit capable of achieving high Safety Integrity Levels (SIL 3 according to IEC 62061) and Performance Levels (PL e) when implemented according to the manufacturer’s guidelines. The module performs continuous cross-circuit monitoring of its input channels, detecting dangerous failures such as short circuits between the wires of the two safety channels or to the supply voltage, which could otherwise bypass the safety function. This diagnostic capability is critical for maintaining the integrity of the safety circuit.Ease of use and installation are significant benefits. The 440R-N23132-A features clear, color-coded LED indicators that provide immediate visual feedback on the module’s status, including power, output state, fault condition, and reset readiness, greatly simplifying troubleshooting. The use of pluggable terminal blocks accelerates wiring and allows for easy module replacement if necessary. The integrated manual reset function, with a monitored reset input, ensures a deliberate, two-handed action is required to restart the machine, preventing automatic or accidental restarts. Compact in size, the Allen-Bradley 440R-N23132-A fits easily into control panels, and its well-documented design makes it straightforward for system integrators and machine builders to implement compliant safety functions without excessive complexity.
