A/B/Z-Phase Differential Output Linear Encoder - Mitsubishi Electric MR-J5 User Manual

1.8

A/B/Z-phase differential output linear encoder

Precautions
• When using A/B/Z-phase differential output linear encoders, use the MR-J5-_-RJ_.
This section explains how to connect an A/B/Z-phase differential output linear encoder to a servo amplifier. Fabricate the
encoder cable using an MR-J3CN2 connector set as shown in the following wiring diagram.
Page 70 Internal wiring diagram
A/B/Z-phase differential output linear encoder specifications
The signals of A/B/Z-phase linear encoders are output by a differential line driver. Open collector outputs cannot be used.
The phase differences of the A-phase and B-phase pulses and the pulse width of the Z-phase pulse need to be 200 ns or
more.
The multiply-by-four count method is used for A-phase and B-phase output pulses of the A/B/Z-phase differential output linear
encoder.
Linear encoders without phase Z cannot perform homing.
The tolerable resolution range is between 0.001 μm and 5 μm. Select a linear encoder that has a resolution within this range.
Encoder
LA, LB, LZ
LAR, LBR, LZR
Am26LS31 or
equivalent
Connecting the servo amplifier and A/B/Z-phase differential output linear encoder
Servo amplifier
CN2
CN2L
Connector set
MR-J3CN2 (optional)
LA
LAR
LB
LBR
LZ
LZR
Linear servo motor thermistor
Phase difference: 200 ns or more
1 pulse of Z-phase = 200 ns or more
A/B/Z-phase differential output linear encoder
1.8 A/B/Z-phase differential output linear encoder
1 LINEAR ENCODER
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