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Guard Lock Safety-door Switch D4BL A-73
D4BL
Safety Door
Switches
G9SA-301 (24 VAC/VDC) + D4BL-@G-@ (Solenoid Lock Type) Circuit Diagram (Auto-reset)
Timing Chart
Limit switch S1
S1: Safety Limit Switch
with direct opening mechanism
(D4B-N, D4N, D4F)
S2: Guard Lock Safety-door Switch
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
Guard Lock Safety-door Switch S2
Operation signal
Lock signal
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Guard opens
TH
SA
A1 A2
T11 T12
K1
K1
PE
T21 T23 T22
K2
K2
6
a
b
1
2
3
4
5
6
JP
13
T32T31
23 33 41
2
5
3
1
K1
K2
4
a
b
Control
Circuit
14 24 34 42
AB
Feedback loop
KM1
KM2
KM1
KM2
M
Operation
instruction
Motor controller
Lock signal
Operation signal
KM1 KM2
31
32
12
11
S2
S1
OPEN
12
11
Note: 1. This example circuit is for Category 4.
2. The lock can be released at any time. Therefore, do not use a model
with a solenoid lock in applications where the operator may be
exposed to danger when the guard opens. Use a model with a
mechanical lock.