BEI SENSORS EM-DR1-IS-5-RTB-28V/V 60004-003 Intrinsically Safe Barrier Module

Overview

The BEI SENSORS EM-DR1-IS-5-RTB-28V/V is an intrinsically safe galvanic isolation barrier module from the EM-DR1 series, with factory part number 60004-003. The BEI SENSORS EM-DR1-IS-5-RTB-28V/V is designed for quadrature encoder signal transmission in hazardous classified areas, complying with ATEX and Class I Div.1 safety standards. The BEI SENSORS EM-DR1-IS-5-RTB-28V/V provides isolated power supply and signal isolation for BEI incremental encoders, separating the safe-side control system from the explosive zone to limit energy entering the hazardous circuit. It supports differential quadrature A/B/Z channel signals and long-distance wiring up to 152 meters, and is widely stocked as spare safety interface for oil & gas, chemical, offshore and mining motion feedback loops.

Features

The BEI SENSORS EM-DR1-IS-5-RTB-28V/V accepts 12–28 V DC safe-side input and supplies regulated 5V power to the encoder located in hazardous area. The BEI SENSORS EM-DR1-IS-5-RTB-28V/V carries galvanic isolation between safe side and hazardous side, with built-in current and voltage limiting circuits to meet intrinsic safety requirements. It supports standard differential quadrature signals A, B and index Z, with bandwidth up to 250 kHz for high-speed encoder feedback. The BEI SENSORS EM-DR1-IS-5-RTB-28V/V uses screw terminal block RTB wiring and standard DIN rail mounting, and includes line fault detection for open circuit or short-circuit on the field side. The suffix V stands for voltage output variant, matching encoder signal interface definition for direct replacement in existing EM-DR1 barrier systems.

Specs

Device Type: Intrinsically safe encoder barrier module Model: BEI SENSORS EM-DR1-IS-5-RTB-28V/V Manufacturer Part No.: 60004-003 Series: EM-DR1 Safety Certification: ATEX, Class I Div.1 Supply Voltage: 12–28 V DC (safe side) Field Output: 5V DC for encoder Signal Channels: A, B, Z differential quadrature Max Bandwidth: 250 kHz Max Cable Length: 152 m Detection: Field line fault monitoring Mounting: DIN rail mounting Terminal Type: RTB screw terminal block Operating Temperature: -40°C ~ +80°C Protection Grade: IP20 Application: Hazardous area encoder feedback, oil & gas valve actuator, offshore crane, chemical DCS position monitoring

Principle

The BEI SENSORS EM-DR1-IS-5-RTB-28V/V limits the available power and energy transferred to the hazardous side, while passing quadrature encoder signals through the isolation barrier. The encoder installed in explosive zone sends position pulses back to the safe side control system via the BEI SENSORS EM-DR1-IS-5-RTB-28V/V. The barrier continuously monitors wiring integrity. If short circuit or open wire occurs on the field loop, the barrier sends fault status to the upper PLC or motion controller and restricts energy output to maintain intrinsic safety.

Applications

The BEI SENSORS EM-DR1-IS-5-RTB-28V/V is used for isolated encoder feedback in hazardous locations for chemical plants, refineries, offshore platforms and mining equipment. It serves safe position and speed signal transmission for actuators, dampers and rotary machinery in classified zones. The BEI SENSORS EM-DR1-IS-5-RTB-28V/V applies to spare stock and emergency replacement of legacy BEI EM-DR1 intrinsic safety barrier assemblies. It also supports hazardous-area instrument loop renovation and safety setting verification.