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24
The 24 V connection lines are to be fused in accordance with the appli-
cable regulations. A soldered in fuse protects the device in case of
internal short-circuits.
4.4 DIGITAL SET POINT INPUT
The digital set point input X22.1 works with a logic signal. It can, for
example, be gated by 24 V DC. If a voltage of more than 3 V is available
at this input then the Thyro-S is switched on; below 3 V it is switched
off. Between terminals X22.1 (input) and X22.2 (+15 V) a switch or relay
contact, for example, can be operated. If a voltage is applied directly to
X22.1 (+) then its reference point must be connected to X22.3 (earth).
All control terminals are connectable with up to 1.5 mm
and have a
2
3.5 mm grid.
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