User manual

UNIVERSAL SENSOR SWITCHING MODULE
Instruction manual Page 15
Released 09/2006 Rights reserved for change in technical data! HYGROSENS INSTRUMENTS GmbH Postfach 1054 D-79839 Löffingen Tel: [phone] Fax: [phone]
6.5 Time delay switch
A digital time delay switch is integrated in the module, which can be adjusted over a
wide range. The applications are many, for example, for direct triggering of cooling
units or pumps, in order to avoid short time running time of the units.
The time delay switch ensures that the load remains switched on for a certain extra
time period even after the switching criterion is not fulfilled further. The delay timer is
reset by a renewed switching requirement during the time delay span and begins to
recount.
6.5.1 Jumper connections
The time delay is digitally adjusted over 8 jumper connections. Only one jumper must
be inserted in each case!
Pin Function
1 Inactive, approx 1 sec.
2 approx. 10 sec.
3 approx. 20 sec.
4 approx. 40 sec.
5 approx. 1 min. 20 sec
6 approx. 2 min. 40 sec
7 approx. 5 min 20 sec
8 approx. 10 min 40 sec
This typical time can show a
tolerance of approx. +/- 20%
6.6 Relay
The relay on the module has a changeover contact and can also trigger heavy loads.
The safety of the load circuit must be carried out through some external protection (NO
contact max. 5A T, NC contact max 2A T). To switch higher currents, corresponding
switching units should be used.
The NO contact is provided with a surge protection varistor VZ05/390V. The operating
limits of components are to be taken care of!