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Specification No. 02125-001 Rev 0713

OPTICAL ISOLATOR

ELECTRONIC MODULE

Output Code Format

From Encoder

Dual Channel in quadrature plus index and complements. Data lines are designated A, B, Z, A/, B/, Z/ at the

module

Output Signal Type

From Encoder

Differential line driver (Use Connection Instructions #1)

Single ended line driver (Use Connection Instructions #2)

Single ended open collector with pull-up resistors internal to encoder (Use Connection Instructions #3)

Single ended, open collector (Use Connection Instructions #3)

Output Signal

Voltage Level From

Encoder

5 VDC (TTL, RS422 compatible, line driver)

12-15 VDC

24VDC

Frequency Response

of Optical Isolator

1 MHz, maximum

Power Requirements

For Optical Isolator

5-28 VDC ±5%, 75mA plus load current

Optical Isolator

Output Options

28V/V Line Driver, 100mA source/sink, Vout = Vin

28V/5 Line Driver, 100mA source/sink, Vout = 5V (Derate output current to 50mA with supply voltage > 12VDC)

28V/OC NPN Open Collector, 80mA sink

Protection Level

Supply lines protected against over voltage to 60 volts and reverse voltage

Tristate Outputs

Available as

–S Special Feature

ELECTRICAL SPECIFICATIONS

MECHANICAL SPECIFICATIONS

Package dimensions are 114.4 mm high by 99 mm wide by 22.5

mm thick. The package mounts to a DIN rail type EN 50 022

(35mm X 7.5mm). A length of DIN rail is supplied with each

module. The module simply snaps directly to the DIN rail and is

ready to use.

22.5 mm

(0.89 inches)

114.5 mm

(4.51 inches)

99 mm

POWER:

The optical isolator can accommodate standard operating

voltages from 5 to 28 VDC. It should never be connected

directly to AC power mains. The module draws approximately

75 mA and a green LED indicates the unit is powered. The

optical isolator module does not provide power to the encoder.

Any encoders used in conjunction with this module must be

connected to their own power.

SIGNAL:

Specifying an optical isolator module requires knowledge of

three system parameters: the DC supply voltage available in the

system; the encoder output type (logic levels and driver type);

and the input signal specifications of the receiving electronics.

This is a versatile interface between an incremental

encoder and receiving electronics. It accepts single

ended or differential inputs and provides single ended or

differential outputs in either an open collector or line

driver configuration. It accommodates all standard

operating voltages from 5 to 28 VDC. Up to eight Optical

Isolator Modules can be daisy-chained to provide

multiple, simultaneous outputs to controllers or PLC’s.

This Optical Isolator can help clean up noisy signals by

converting to a different line driver output. It has a 1

MHz throughput capability and can be used wherever a

fast, optically isolated interface is required.