2. Safety
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– TW-31-E - V1.9 - 06.04.2021
2.5 Electrical safety
- The tank monitor itself and the associated control circuits and load circuits
must be protected separately and in accordance with the local regulations.
- The separate protection of the control- and load circuit must be carried out
according to local conditions!
- In order to prevent destruction of the relay or semiconductor relay outputs in
the event of a short-circuit the load circuit should be fused to the maximum
permissible output current.
- As well as incorrect installation wrong parameter settings can also adversely
affect the correct functioning of the controller. For this reason safety devices
that are independent of the controller should always be used, e.g. high and
low pressure valves or temperature limiters. Account should be taken of the
local safety regulations in this connection.
- The load circuit (relay outputs K1 to K3) must be fused in accordance with the
connected components.
- The connection of external voltages to the digital inputs can lead to the
destruction of the control.
- Caution: All cables to the digital inputs must be shielded and kept as short as
possible. EMC.
Important note concerning the external fuse.
- The transformer, which is installed in the TW-31 has a two-chamber safety
winding, is only conditionally short-circuit-proof due to the built-in thermal
protection.
Protect control unit with an external fuse of 160 mA!
!
NOTICE
