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Chapter 2 Wiring and Connection
2-26
2-6-3 Connection of external option regeneration resistance unit
Disconnect the short bar connected between the P and D terminals, and connect the option
regeneration resistor between the P and C terminals. The thermal protector terminals (G3, G4) are
used together with the electronic thermal to provide double-protection against overheating of the
regenerative resistor. Construct a sequence in which an emergency stop results when the current
stops flowing between G3 and G4.
DANGER
1. Select the installation place so that foreign matter (cutting chips, cutting oil,
etc.) do not enter the regenerative resistance unit's terminal block. A
short-circuit between the P and C terminals could lead to servo amplifier
damage.
2. The regenerative resistor generates heat of approximately 100°C (or higher,
depending on the installation conditions). Give sufficient consideration to
heat dissipation and installation position.
3. Use flame retardant wire or provide flame retardant treatment for the wire
connected to the regenerative resistance unit.
CAUTION
Always use twisted pair cable to connect to the servo amplifier, and keep the
length of the wiring to 5m or less.
Refer to section "7-1 Selection of wire" for details on selecting the wire.
MDS-B-SVJ2
TE2
P
C
G4
G3
P
C
D
×
×
External option regeneration
resistance unit
Disconnect the
short bar.
G3 and G4:
Thermal protector terminals
The current stops flowing
between G3 and G4 when there
is abnormal overheating.
Contact capacity: 150mA
Contact ON resistance: 10m
Ω
Twist the wires.
5m or less
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