User manual

Released 03/2008 Rights reserv ed f or change in technical data! HYGROSENS INSTRUMENTS GmbH Postf ach 1054 D-79839 Löf f ingen Tel: [phone] Fax: [phone]
page 9
LEVEL CONTROLLER FOR
CONDUCTING LIQUIDS
230V AC model:
The connection with mains power supply should be done
by only trained and authorised persons. The electrical
connection is done through the 9-pin plug connector as
per pin configuration. The device can be operated only
with 230V AC supply. The mains supply connection is
protected against over-voltage through a 390V varistor.
The safety of the device against too high load current
should be ensured through an external protection
arrangement.
The terminal PE is not connected to the device and is
only used to fix or clamp the PE wire. Its wiring is not
necessary.
The container with the medium should be grounded by
suitable means to protect against high voltages in case
of malfunction.
5.1.4 Load circuit
The safety of load circuit, if required, should be
taken care of through some external protection
arrangement. (max. 5A NO contact, 2A NC contact).
To switch higher currents, corresponding switching
elements should be used.
The NO/NC contacts of both the relays are potential
free and are terminated at the connection socket.
The connection of load is done as per connector
configuration. The NO contact of the relay is
provided with a 390V varistor for surge suppression.
Pin Description
1 LIVE (only 230V model)
2 NEUTRAL (only 230 V model)
3 PE (only 230V model)
4 Relay 1 common terminal
5 Relay 1 NO contact
6 Relay 1 NC contact
7 Relay 2 common terminal
8 Relay 2 NO contact
9 Relay 2 NC contact