Optical Isolator Module

This DIN rail mounted encoder interface lets you connect an encoder to a variety of controllers, or to multiple input devices. It provides an optically isolated signal and is available with one of four output driver options making it compatible with all major counter, drive and PLC components. Multiple modules can be daisy-chained together and drive as many as eight different devices from a single encoder.

The interface module also provides LED output indicators for two quadrature channels and an index. All circuitry for the module is packaged in a housing that mounts to a standard external DIN rail. For ease of installation, a 75 mm length of DIN rail is supplied with each module.

PDF: OIM Applications Guide 5 pgs, 291k

Intrinsic Safety Barrier

This Galvanically Isolated Intrinsic Safety Barrier is the perfect complement to BEI encoders for hazardous environments. It is electrically compatible with all popular counters, PLCs and controllers, and it features isolation for power and three signal channels, as well as LED indicators for power and data - all in a single DIN rail package.

The BEI Barrier carries CENELEC, UL and cUL ratings and is suitable for long cable runs. Since it also carries a nonincendive designation per the National Electrical Code, it can be mounted in Class I, Division 2 areas.

Encoder Tester

This DIN rail mounted tester is designed to simply and reliably test the operation of any industrial encoder. The tester provides LED output indicators for two quadrature channels and an index as an aid in troubleshooting and equipment set-up. It can be used for field troubleshooting, incoming inspection, and to check the operation of encoded motors. It comes with an instruction booklet that includes connection diagrams for all the common encoder output types and voltages.

Circuitry for the Tester is packed in a standard housing that mounts to an external DIN rail type EN 50 022. For ease of installation, a length of DIN rail is supplied with each Tester.

Anti-Dither Module

This module can solve the problem of extra counts caused by high vibration. The Anti-Dither module accepts quadrature inputs (A and B signals) and sends a single channel signal to the counter circuitry only when there has been true movement of the encoder. This is especially useful in web processes, handling and inspection systems that use conveyors and simple speed or position control in high vibration environments.

Encoder Broadcaster Module

The Broadcaster accepts standard incremental encoder inputs, (two channels in quadrature plus an index and complements) and can broadcast up to four encoder signals to four independent devices. Each of the broadcast signals is optically isolated eliminating ground loops. This compact package also allows for signal processing options, such as anti-dither filter, integer countdown or pulse and direction outputs, to be incorporated into each of the four broadcast signals independently. The broadcaster is ideal for driving multiple receivers from a single encoder in applications like electronic line shafting or synchronization of multiple devices to a single operation.

The module accepts signals from 5 to 28 VDC and provides three output options: Vout = Vin, Vout = 5 V or NPN open collector. The compact package mounts to standard EN 50 022 35mm X 7.5mm DIN rail and is 142mm wide, 78mm deep and 45mm above the DIN rail.  A 155mm section of DIN rail is included.

Serial-to-Parallel Converter

BEI’S serial-to-parallel converter module takes serial data from any BEI Serial Synchronous Interface (S3) or RS-422 Interface (S1) encoders and converts it to a parallel output. This eliminates the high cost and noise susceptibility of long, parallel cable runs, enabling the simplicity of a serial output encoder and a low cost twisted pair cable to interface with a standard PLC or controller. The bright LED indicators give visual status for deserialization, testing and troubleshooting.

Serial input, either SSI or RS-422 is easily selectable by a Format Select terminal directly on the board.  In SSI mode, the on-board clock generates pulses to signal the encoder to provide data.  Data is received serially and converted to a parallel format. Clock frequency is selectable by a Speed Select terminal, again directly on the board.  For 100 feet or less, the 1.25 MHz mode can be used and for longer distances, up to 500 feet, a 200 kHz rate is available.

In RS-422 mode, data is received asynchronously from the encoder and converted to a parallel format. Speed Select input is used to set the baud rate: 19.2 kBaud for most applications, up to 500 feet; 115.2 kBaud for shorter runs below 100 feet. 

PDF: Serial-to-Parallel Converter Module
2pgs/241K