TORAY SR-11-C Product Description

Overview

TORAY SR-11-C is an intrinsically safe relay unit manufactured by Toray Engineering, designed for signal isolation and energy limiting between hazardous explosive areas and safe control zones. The TORAY SR-11-C limits the energy level of the intrinsically safe circuit to prevent ignition of flammable gas and vapor mixtures. This SR-11-C intrinsically safe relay serves as a reliable Toray safety barrier relay, widely adopted in oil, gas, chemical and petrochemical process control systems for signal transmission between field hazardous side and control room safe side of the Toray safety barrier relay.

Features

This TORAY SR-11-C integrates energy limiting circuit and mechanical relay contact output for the Toray safety barrier relay. It complies with explosion safety standard 3Ng5 for intrinsically safe protection. The unit provides complete galvanic isolation between the intrinsically safe input circuit and non-safe output circuit. Mechanical relay contact output enables switching of conventional AC loads. The TORAY SR-11-C is housed in a robust metal casing, suitable for cabinet mounting in control rooms. It has passed NK type approval test, stable performance for long-term continuous operation in industrial safety loops of the SR-11-C intrinsically safe relay.

Specs

The TORAY SR-11-C series: Intrinsically safe relay unit. Explosion class: 3Ng5. Intrinsically safe circuit rating: DC 20V, 15mA. Power supply: AC 100/110V, 50/60Hz. Relay contact rating: AC 220V, 5A maximum. Weight: approx 770g. Approval: NK test certificate 78T636. Mounting: cabinet installation. The TORAY SR-11-C complies with relevant explosion protection standards as a SR-11-C intrinsically safe relay.

Principle

TORAY SR-11-C receives low-energy digital signals from field intrinsically safe devices. The TORAY SR-11-C built-in energy limiting circuit restricts voltage and current on the hazardous side to stay below ignition threshold. When the input signal changes state, the internal relay actuates and switches the isolated contact on the safe side to transmit the on/off signal to the PLC or alarm system. The intrinsically safe barrier structure of the Toray safety barrier relay blocks high-energy surge from the safe side from feeding back into the hazardous area.

Applications

This TORAY SR-11-C is used for digital signal isolation of limit switches, proximity sensors and alarm contact inputs located in explosive hazardous zones. It is applied in chemical plants, offshore platforms, gas processing facilities and refinery control systems. It is used for spare replacement and maintenance of existing safety instrumented systems. The TORAY SR-11-C delivers reliable explosion-proof signal isolation and contact switching for hazardous area control loops as a proven SR-11-C intrinsically safe relay.