26
APEX615n Installation Guide
External Encoder
CONNECTIONS & INTERNAL SCHEMATICS
Internal Schematic
Chassis Ground
Isolated Ground
SHLD
Iso GND
Z-
Z+
B-
B+
A-
A+
+5V
ENCODER Connector
+5VDC
Shield
Ground
Z Channel –
Z Channel +
B Channel –
B Channel +
A Channel –
A Channel +
+5VDC
If you are using a single-ended encoder,
leave the A-, B-, and Z- terminals on the
APEX615n unconnected.
NOTE
Incremental
Encoder
Max. Cable Length is 100 feet.
Use 22 AWG wire.
+1.8VDC
20 KΩ
20 KΩ
+5VDC
Same Circuit
as A Channel
Shield
Black
Orange/White
Orange
Green/White
Green
Brown/White
Brown
Red
Wire colors for Compumotor E Series encoders
PIN OUTS & SPECIFICATIONS
(9-pin ENCODER Connector)
Pin Name In/Out Description
SHLD
ISO GND
Z–
Z+
B–
B+
A–
A+
+5V
-----
-----
IN
IN
IN
IN
IN
IN
OUT
Shield
—Internally connected to chassis ground (earth).
Isolated logic ground.
Z– Channel signal input.
Z+ Channel signal input.
B– Channel quadrature signal input.
B+ Channel quadrature signal input.
A– Channel quadrature signal input.
A+ Channel quadrature signal input.
+5VDC output to power the encoder.
Specification for all encoder inputs
Differential comparator accepts two-phase quadrature
incremental encoders with differential (recommended) or
single-ended outputs. Max. frequency is 1.2 MHz.
Minimum time between transitions is 833 ns.
TTL-compatible voltage levels: Low ≤ 0.4V, High ≥ 2.4V.
Maximum input voltage is 5VDC.
Requirements for Non-Compumotor Encoders
• Use incremental encoders with two-phase quadrature output. An index or
Z channel
output is optional. Differential outputs are recommended.
• It must be a 5V (< 200mA) encoder to use the APEX615n's +5V output. Otherwise, it must
be separately powered with TTL-compatible (low ≤ 0.4V, high ≥ 2.4V) or open-collector
outputs.
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