July 2022
© RLS Wacon analytics GmbH +49 (0)5121 281260
Pag
e
28
Subject to
change without notice
Connection of external components
For the connection of additional components, the unit is equipped with two inputs (input), 4 relays
and an analogue output (current interface 0/4 - 20 mA). A flow monitor, a potential-free switch or
an electronic switch (open collector) can be connected to the inputs (input). Electronic or contact
water meters can be connected for measurement in a quantity interval. An auxiliary voltage of 24
VDC at terminal 13 and GND at terminal 15 is available for the electronics. For signal detection, 24
VDC must be bridged to terminal 14. No external voltage sources may be connected to the input. If
necessary, a potential separation must be made with a relay or optocoupler.
The relay connections are all potential-free. The internal mains voltage or alternatively an external
supply voltage can be used to switch external devices. The connection to external controls is usually
made via the potential-free contacts of the relays.
Figure 16Schematic view of the connection terminals
