Signal Cable Connection; Serial Line Connection; Relays Connection; Wiper Connection - Stahl EC-940S Serie Manuel D'instructions

9.2.3 Signal cable connection

CAUTION! TNV-1 installation type. The
installation is type TNV-1, do not connect it
to SELV circuits.
Use a shielded multipolar cable. Connect
the braiding of the shielded cable to
terminal 8 (J11, Tab. 13, page 28).
The output signal cables must be connected to the
connector for the relays, alarms, serial line, factory
default (J11, 8.4 Connector board description, page
23).
DESCRIPTION OF THE TERMINAL (J11)
Terminal contacts Function
1 RS-485 A (+)
2 RS-485 B (-)
3 Relay 1, Terminal A
4 Relay 1, Terminal B
5 Digital input
6 GND
7 Reset
8 Shield
Tab. 13

9.2.3.1 Serial line connection

The product has an RS-422 serial half-duplex
internally terminated communication line.
Connect the serial line to the relay connector, alarms,
serial line, factory default (J11, terminal 1/terminal 2,
8.4 Connector board description, page 23).

9.2.3.2 Relays connection

The relay is usable with the specifications
described below. Working tension: up
to 30Vac or 60Vdc. Current: 1A max. Use
suitable cable sections with the following
characteristics: from 1.5mm² (16AWG) up to
0.25mm² (24AWG).
Relays do not have polarity and therefore both
terminals of the same relay can be swapped for
indifferently or continuous current voltages.
The clean contact is NO (normally open).
28

9.2.3.3 Wiper connection

The wiper can be operated remotely using an NO
(normally open) dry contact. Connect the clean
contact cables to the connector of relay, alarms, serial
line, factory default (J11, terminal 5/terminal 6, 8.4
Connector board description, page 23).
For the version with built-in wiper, connect the wiring
to the sensor connectors and the wiper power supply
line connectors (J2, J5, 8.3 Control board description,
page 23).

9.3 Ground connection

CAUTION! The external equipotential
connections must be set up through the
eyelet on the outside of the product. Do not
use as a protective terminal.
Fig. 20
The unit must be connected with an equipotential
bonding to the earth with an external cable having
the following minimum section: 4mm² (11AWG).
Connect the earth equipotential bonding cable with
the provided eyelet (suitable for 4mm² up to 6mm²
cable). Fix the eyelet using the M5 screw (A4 Class 70,
12mm, ISO4762) and the provided anti-unscrewing
lock washer.
The equipotential earth connection is necessary for
carrying out additional connections required by law.
MNTCMVXTHD_1606_EN