Opto 22 G4IDC5Q Data Sheet

G4 Digital Quadrature Module

Features

4000 Vrms transient optical isolation

Built-in LED status indicators

4 times encoder resolution

Installs on mistic 200 bricks

Input signals in 4-16 VDC range

G4 Digital Quadrature Module

Description

The G4IDC5Q quadrature input module pair is designed to
allow a digital mistic 200 multi-function I/O Brick to resolve
positional information from quadrature encoder devices. The
module outputs a pulse to the Brick each time the quadrature
state changes. The Brick counts the module outputs and keeps
track of the direction of rotation.

NOTE: This module cannot be used with an E1 or B1 brain board.

Module Operation

The G4IDC5Q Quadrature Module pair converts a quadrature
signal to a pulse stream, which is output on one of the two
logic side outputs. The active output is determined by the
direction of rotation of the encoder. One 0.8 microsecond
pulse is output for each change of quadrature state transition.
The actual resolution of the position count is 4 times the
encoder resolution (pulses per revolution).

The G4IDC5Q is actually a pair of modules, one of which is
labeled “A”, the other “B”. When the signal into the module A
leads the signal into module B, the output will be on module
A. When the signal into module B leads the signal into module
A, the output will be on module B.

G4IDC5Q

even-numbered channel leads the signal into the odd­numbered channel.

Since the digital mistic 200 I/O unit has a maximum input
frequency at 50% duty cycle of 12.5 KHz (see “Specifications”

on page 2), then:

Maximum Allowable Encoder
RPM (at 50% duty cycle)

12,000 pulses/secX60 sec

=

encoder pulses/rev 1 minute

On a digital mistic 200 I/O unit, quadrature input channels
must be configured in pairs, with the lower channel number
being even. Therefore the only quadrature pairs allowed are
channels 0 & 1, 2 & 3, 4 & 5, 6 & 7, 8 & 9, 10 & 11, 12 & 13, and
14 & 15.

The positional count is incremented when the signal into the
odd-numbered channel leads the signal into the even­numbered channel. It is decremented when the signal into the

© 2001–2016 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

Part Number

Part Description

G4IDC5Q

G4 DC Input 2.5-16 VDC, 5 VDC Logic,
2-channel Quadrature

Form 0548-160714

PAG E

1

DATA SHEET

Specifications

Logic Voltage 5 VDC

Operating Ambient Temperature -30 °C to 70 °C

Isolation input-to-output

Input Voltage Range 4–16 VDC

Input Current 8 mA (constant)

Input Allowed for No Output 1 V

Logic Supply Current @ 5 VDC 60 mA

Maximum Input Frequency,
50% Duty Cycle

Minimum Time Between
Quadrature State Changes at 90°

4,000 V

12.5 kHz

20 µsec

RMS

Wiring Diagram

G4 Digital Quadrature Module

G4 Digital Quadrature Module

DATA SHEET

Form 0548-160714

PAG E

2

© 2001–2016 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respecti ve companies or organizations.