Mitsubishi Electric Melsec-Q172DCPU User Manual page 101

2 SYSTEM CONFIGURATION
Input or
Output
Always use a shield cable for connection of the SY.ENC connector and external equipment, and
avoid running it close to or bundling it with the power and main circuit cables to minimize the
influence of electromagnetic interface. (Separate them more than 200mm (0.66 ft.) away.)
Connect the shield wire of the connection cable to the FG terminal of the external equipment.
When increasing the cable length, use the cable 50m(164.04ft.) or less. Note that the cable
should be run in the shortest possible distance to avoid induced noise.
Always wire the cables when power is off. Not doing so may damage the circuit of modules.
Wire the cable correctly. Wrong wiring may damage the internal circuit.
(5) Interface between SY.ENC connector and external equipment
Signal
Pin No.
name
MD 6
MDR 16
MR 7
MRR 17
P5 10 18 19 20
Input
LG 1 2 3 11 12
BAT 9
TREN
4
(Note)
TREN.
14
COM
(Note)
SD plate
(Note): As for the connection to power line (TREN, TREN.COM), both "+" and "–" are possible.
Wiring example Internal circuit
Serial
absolute
synchronous
encoder
12VDC to 24VDC
CAUTION
2 - 68
Specification
Transmission method:
serial communications
Position detection
method: absolute
5VDC
Battery
Description