Connection
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26
When grounding the actuator Protective Earth Terminal
(48 VDC only):
Be sure to ground the Protective Earth Terminal of
the actuator.
•
Grounding wire: AWG18 (0.75 mm
2
) or more
•
Screw size: M4
•
Tightening torque: 1.2 N·m (170 oz-in)
Grounding
To ground the actuator, use a round terminal, bolt and washer.
Do not share a grounding wire with a welder or any other power equipment.
A grounding wire and crimp terminal are not supplied.
7-2
Releasing the electromagnetic brake
Perform according to the following steps to release an electromagnetic brake.
1. Connect the "electromagnetic brake cable" and "cable for electromagnetic brake."
2. Connect the lead wires of the “cable for electromagnetic brake” to the 24 VDC power
supply.
Connect the white lead wire to the +24 VDC terminal, and the black lead wire to the GND
terminal.
When the power is turned on, the electromagnetic brake is released and the moving part
of the actuator can be moved by hand.
Cable for
electromagnetic
brake
Electromagnetic
brake cable
24 VDC±5%
DC power
supply *1 *2
Switch
White
Black
Varistor *3
*1 If the distance between the electromagnetic brake type actuator and the driver is
extended to 20 m (65.6 ft.) using an accessory cable, use the power supply of 24 VDC±4%.
*2 Refer to the following current capacities for the 24 VDC power supply.
DRSM42
: 0.08 A or more
DRSM60
: 0.25 A or more
*3 Connect the varistor to protect the contact of the switch or to prevent electrical noise.
[Recommended varistor: Z15D121 (SEMITEC Corporation)]
The lead wires of the "cable for electromagnetic brake" have polarities, so
connect them in the correct polarities. If the lead wires are connected with their
polarities reversed, the electromagnetic brake will not operate properly.
