ABB JSHD4-2B Safety Relay Module

Overview

The ABB JSHD4-2B is a safety relay module from the ABB JSHD4 safety relay family. This ABB JSHD4-2B is designed for dual-channel safety signal monitoring, compatible with emergency stop pushbuttons, safety door switches and safety light curtains. It provides positively guided safety contacts to cut off power to contactors and drives when a safety event is triggered. It meets ISO 13849-1 Category 3 / PL d safety requirements and is widely used as spare part for safety control circuits on machinery skids, packaging lines and material handling systems.

Features

The ABB JSHD4-2B supports dual-channel safety input and cross-wire short-circuit detection.JSHD4-2B allows manual reset or automatic reset selected by wiring configuration. Equipped with positively guided safety contacts to guarantee reliable disconnection under fault conditions. LED status indicators for power supply, channel status and fault diagnosis. Compact DIN rail mounting design for easy installation inside control cabinets. Built-in reverse polarity protection and surge voltage suppression. Compliant with ISO 13849-1, IEC 60204-1, EN 60947-5-1, CE and UL standards.

Specs

Device Type: Safety Relay Module Model: ABB JSHD4-2B Brand: ABB Series: JSHD4 Safety performance: Cat.3 / PL d Input: Dual-channel safety input Output: Positively guided safety relay contacts Mounting: DIN rail Status: Genuine ABB safety spare part

Principle

The ABB JSHD4-2B continuously monitors the integrity of two safety input channels. Once emergency stop or safety gate opening is detected, the safety relay contacts open and disconnect the downstream power circuit. It also detects wiring faults and cross shorts, and prevents unintended automatic restart after a fault.

Applications

The ABB JSHD4-2B is deployed for emergency stop and safety interlock monitoring on process skids, packaging machines and conveyor lines. The JSHD4-2B is stocked as spare replacement for ABB safety control loops.