H. ZANDER GmbH & Co. KG • Am Gut Wolf 15 • 52070 Aachen • Deutschland • Tel +49 241 9105010
Fax +49 241 91050138 • [email protected] • www.zander-aachen.de
8
Safety Time Control Device SCB
This means that the connected load is switched off as soon as a request from connected
sensor elements or diagnostic measures detects a dangerous state, e.g. caused by a
component fault.
Since process-related applications in particular have high demands on availability, limited
availability can also have significant consequences.
It is therefore recommended to stock a second unit to avoid long downtimes in such a
case.
These are recommendations of the manufacturer, the evaluation of the importance of the
plant availability is the sole responsibility of the operator.
6. Features
•
Depending on variant:
−
2 safety semiconductor outputs and 2 safety relay contacts (SCB-04)
−
2 safety relay contacts (SCB-02)
−
3 safety semiconductor outputs (SCB-03)
•
Switching behaviour configurable on the device
•
2 semiconductor auxiliary outputs
•
Adjustable switch-on / switch-off delaytime
−
Depending on variant: 0 to 99 s; 0 to 99 min; 0 to 99 h (Resolution
≥
0.1 s/min/h)
•
Connection of:
−
Potential-free NC contacts
−
PNP-Semiconductor outputs
−
OSSD outputs
•
Single or dual-channel operation possible
•
Simple, fast and accurate delaytime adjustment via push/rotary button and display
•
Indication of all switching states via LED
•
Automatic or monitored, manual reset
•
For safety applications up to PL e, Cat. 4, SIL 3
•
For furnaces in continous operatin according to EN 50156-1 and EN 746-2
•
EN ISO 13849-1; IEC 62061; IEC 61508; IEC 61511; EN 50156-1; EN 746-2
