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3. SIGNALS AND WIRING
Note 1. To prevent an electric shock, always connect the protective earth (PE) terminal (terminal marked ) of
the base unit to the protective earth (PE) of the control box.
2. Connect the diode in the correct direction. If it is connected reversely, the interface unit will be faulty
and will not output signals, disabling the forced stop and other protective circuits.
3. If the controller does not have an emergency stop (EM1) function, always install a forced stop switch
(Normally closed).
4. CN1A, CN1B, and CN3 have the same shape. Wrong connection of the connectors will lead to a
fault.
5. The sum of currents that flow in the external relays should be 80mA max.
6. When starting operation, always turn on the forced stop (EM1). (Normally closed contacts) By
setting “0001” in DRU parameter No.23 of the drive unit, the forced stop (EM1) can be made invalid.
7. Use MRZJW3-SETUP151E.
8. Use the bus cable at the overall distance of 30m(98.4ft) or less. In addition, to improve noise
immunity, it is recommended to use a cable clamp and data line filters (three or four filters
connected in series) near the connector outlet.
9. The wiring of the second and subsequent axes is omitted.
10. Up to eight axes (n
1 to 8) may be connected. The MR-J2S- B/MR-J2-03B5 servo amplifier may
be connected on the same bus.
11. Always insert the termination connector (MR-A-TM) into CN1B of the interface unit located at the
termination.
12. The bus cable used with the SSCNET depends on the preceding or subsequent controller or servo
amplifier connected. Refer to the following table and choose the bus cable.
MR-J2S- B MR-J2-03B5
QD75M MR-J2HBUS
M
Q172CPU(N) Q172J2BCBL M(-B)
Q173CPU(N) Q173J2B CBL M
Motion
controller
A motion MR-J2HBUS M-A
MR-J2S- B MR-J2-03B5
Maintenance junction card
MR-J2HBUS M
13. When the A1SD75M (AD75M) is used as the controller, encoder pulses may not be output
depending on the software version of the controller. For details, refer to the A1SD75M (AD75M)
Manual.