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Safety Time Control Device
10. Electrical connection
•
Wiring only be carried out while the voltage supply is switched off
•
Do not connect any external voltages to the outputs O1, O2, C1 and C2
•
The outputs O1, O", C1 and C2 are short-circuit-proofed. Overloading is not allowed and
results in damage to the device (see „Technical data")
•
Auxiliary outputs C1, C2 may not be used as safety outputs
•
A safety transformer according to EN 61558-2-6 or a power supply unit with galvanic
isolation should be connected upstream of the mains
•
An external fuse for the relay contacts (6 A gG) must be provided
•
Inductive loads at the outputs and contacts must have sufficient protective circuitry, e.g.
a free-wheeling diode
ATTENTION!
If automatic reset is configured, the SCB is immediately activated when the safety circuit is
closed.
The monitored manual reset of the device should not be used to start the machine in
accordance with EN ISO 13849-1.
Figure 6: Front view of the SCB - Terminal explanation (for the SCB-04)
H. ZANDER GmbH & Co. KG • Am Gut Wolf 15 • 52070 Aachen • Deutschland • Tel +49 241 9105010
Fax +49 241 91050138 • info@zander-aachen.de • www.zander-aachen.de
A1:
Power supply (DC 24 V)
A2 :
Power supply (0V)
I11/I21:
Safety circuit channel 1
I12/I22:
Safety circuit channel 2
X1:
Automatic or manual reset
Y1:
Feedback circuit
17-18/27-28:
Safety relay contacts
O1/O2:
Safety semiconductor outputs
C1:
Auxiliary output 1
C2:
Auxiliary output 2
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