2BB72 4BN2 4-Channel Relay Output Module

Feature & Principle

It is a pluggable relay terminal module. It receives low-level control signal from PLC to drive internal relay coil, and realizes isolation conversion between control circuit and load circuit by dry contact. Each channel is independent, can switch AC or DC load. Built-in freewheeling diode to suppress back EMF, reduce interference to control system, widely used for pump, valve and alarm light on-off control.

Specifications

Model: 2BB72 4BN2 Channel: 4 relay outputs Coil voltage: 24VDC Contact type: Form A / Form C optional Contact rating: 250VAC 5A Isolation: Optical isolation between coil and contact Installation: DIN rail mounting Application: PLC extension, alarm output, solenoid valve control Certification: CE

Components & Diagnostics

PCB substrate, electromagnetic relay, freewheeling diode, terminal block, status indicator LED. Common faults: relay contact burnout, coil open circuit, indicator not lit, channel no switching action.

Product Brief

2BB72 4BN2 relay output module, industrial automation spare widely used for PLC cabinet signal isolation and field actuator control maintenance and replacement.