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Shenzhen ESPE technology Co., LTD
safety relay module ESRH-3A1B

safety relay module ESRH-3A1B

Product catalog summary

Product Introduction
The ESRH-3A1B series is a two-hand button control module designed to meet PLe safety requirements of ISO 13849-1. It is suitable for industrial sites with high safety demands, featuring a dual-channel input mode and a synchronization time not exceeding 0.5 seconds. The module includes 3 normally open (NO) safety output contacts and 1 normally closed (NC) auxiliary output contact.

Product Features

Designed according to ISO 13849-1 (Category 4 PLe).
Relay output: 3NO and 1 NC auxiliary contacts.
Cross-diagnose monitoring function within the circuit.
Power supply reverse polarity protection.
Visual status indicator for easy diagnosis.
Input power overvoltage protection.
Standard 35mm width guide mounting design.
Detectable terminal for easy maintenance.

Product Parameters

Power Supply: DC24V±10%
Consumption: <3W
Response Time: <20ms
Suction Buffer Time: <100ms
Power-on Restart Time: <1s
Mechanical Lifetime: ≥10,000,000 times
Electric Lifetime: ≥100,000 times (1NO: 5A 250VAC, Resistive load)
Vibration Resistance: Frequency 10Hz-55Hz, amplitude 0.35±0.05mm
Impact Resistance: Acceleration 10g, pulse duration 16ms
Working Temperature: -10~+55°C
Storage Temperature: -40~+85°C
Protection Level: Enclosure IP40, Terminal IP20

Application Details
The module operates by connecting the A1 terminal to the positive and A2 to the negative of a DC24V power supply. When the input loop signals S11 and S21 are correct and the reset loop is active, the module functions. It features automatic reset and dual-channel input, with specific connections for safety and auxiliary contacts.

Installation and Safety Warnings

Ensure the power supply is cut off during installation and wiring.
Mount the product directly onto a 35mm rail inside the equipment cabinet.
Verify cable connections and secure the product before powering on.
Disconnect power before disassembling the product.

Catalog excerpts

0 Productintroduction ESRH two hand button control module meet PLe safety requirement of ISO 13849-1, and is suitable for monitoring two hand button in industrial site with high safety requirements. It adopts dual-channel input mode, and has a detection ability with dual-channel synchronization time not exceeding 0.5s; it has a two-hand button control module with 3NO safety output contacts, and 1 NC auxiliary output contact. • Design according to ISO13849-1 (Category 4 Ple). • Relay output: 3NO and 1 NC auxiliary contacts. • Inside circuit with cross-diagnose monitoring function. • Input power overvoltage protection. • Power supply reverse polarity protection. • Visualized status indicator for easy diagnoses. • Detectable terminal for easy maintenance. • Standard 35mm width guide mounting design.

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Output method

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• Power: power indicator, ON after power on. • CH1: channel 1 indicates that relay 1 is on when work and off when disconnect. • CH2: channel 2 indicates that relay 2 is on when work and off when disconnect. • A1/A2: DC24V power input/ output terminal. • S11: two hand button input 1 terminal. • S21: two hand button input 2 terminal. • Y1-Y2: connect with Y1, Y2 to automatic reset. • 13/14, 23/24, 33/34: 3 loop safety contacts output (NO) terminal. • 41/42: 1 NC auxiliary contacts terminal. Two hand button control module ESRH-3A1B supply 3 safety contacts output and 1 auxiliary contacts output...

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Control logic ESPE www.espetech.com

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• Please cut off the power supply when mounting, and ensure no dangerous voltage of machine, except the lighting device and spare sockets; Clip the product directly onto 35mm rail inside the equipment cabinet. Before powering on, please check to ensure cable connection is correct and the product is fastened to the mounting rail. Before disassembling the product, you must cut off the power supply to the machine, then loosen the locking screws or remove terminals. Carefully read the manual before installation, and ensure power supply is cut off when wiring. Wiring with power is prohibited.

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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