60001-003 Datasheet, PDF (3/5 Pages) List of Unclassifed Manufacturers – The optical isolator can accommodate standard operating voltages from 5 to 28 VDC

CONNECTION INSTRUCTIONS #3
Open Collector with or without Internal Pull-up Resistors
Encoder NPN (sinking) outputs.
Connect encoder output A to optical isolator module input A/, B to B/ and Z to Z/. Connect the A, B, and Z
inputs of the optical isolator to the auxiliary output terminal on the optical isolator module for 5V module and to
higher voltage when specified by module model and part number. This connection results in a logic inversion
within the optical isolator module. To compensate for the logic reversal, swap A for A/, B for B/, and Z for Z/
at the optical isolator outputs.
Z
+5 Output
Encoder Circuit
Common
ENCODER
B
A
A/
A
B/
B
CONTROLLER
Z/
Z
Vs, 5V to 28V
0V, Power Common
To 5 AUX for 5V module.
To 12-15 for 24V dependent
on specified module input
voltage.
Figure 3
Connection Diagram
Open Collector to Optical Module
Optical Isolator
A
A
A or A/
A/
A/
B or B/
Z or Z/
B
B/
Z
Z/
AUX
5V ^REG
B
B/
Z
Z/
VS
0V
+V
+V
Optical Regulation
Power Supply
0V
0V
Encoder Open Collector Output
Uses for Optical Isolator Module
Example 1: Resolve an electrical conflict between encoder output and receiving electronics
Sometimes system constraints result in an incompatibility between the encoder output and the receiving electronics or the
cabling. A typical symptom of this problem is missed or intermittent counts. As an example, a single-ended TTL receiver
that is more than 20 feet from the encoder may not be able to compensate for the signal attenuation and ringing caused
by the encoder cabling. An optical isolator module installed near the receiver as shown in Figure 4 can receive the signal,
rejecting the cable effects and produce a signal compatible with the input device.
> 20’
Optical
Isolator
Module
FIGURE 4
LONG CABLE RUN TO SINGLE ENDED INPUT
< 6’
TTL
Single-Ended
Receiver
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Specification No. 02125-001 Rev 0713