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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 servo amplifier to the protective earth (PE) of the control box.
2. Connect the diode in the correct direction. If it is connected reversely, the servo amplifier will be
faulty and will not output signals, disabling the forced stop (EM1) and other protective circuits.
3. If the controller does not have an emergency stop function, always install a forced stop switch
(Normally closed).
4. When a personal computer is connected for use of the test operation mode, always use the
maintenance junction card (MR-J2CN3TM) to enable the use of the forced stop (EM1). (Refer to
section 12.1.6)
5. CN1A, CN1B, CN2 and CN3 have the same shape. Wrong connection of the connectors will lead to
a fault.
6. The sum of currents that flow in the external relays should be 80mA max.
7. When starting operation, always turn on the forced stop (EM1). (Normally closed contacts) By
setting “0001” in parameter No.23, the forced stop (EM1) can be made invalid.
8. When connecting the personal computer together with analog monitor outputs 1, 2, use the
maintenance junction card (MR-J2CN3TM). (Refer to Section 12.1.3.)
9. Use MRZJW3-SETUP151E.
10. 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.
11. The wiring of the second and subsequent axes is omitted.
12. 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.
13. Always insert the termination connector (MR-A-TM) into CN1B of the servo amplifier located at the
termination.
14. 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
15. 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.