Aquasant Messtechnik AG
17
4.3.1
EMC protection
Input, output and power supply cables must not be routed in areas that have sources of
electromagnetic interference!
Sources of interference may include, but are not limited to, relays, contactors, motors and
their controls, including thyristor controls and the cables connecting those units. Blue Ex
cables must not be routed together with cables of the same type in the same duct. The locally
applicable regulations for the installation of electrical systems must be observed.
The sensor connection cables must be neatly separated and laid at a distance from
high-voltage and high-frequency cables. In intrinsically safe systems, the sensor
cables must be sheathed in blue (marking).
The type of sensor and device must match and correspond to the application (product-
related use, Ex zone, lightning protection, etc.). The system must be checked to ensure
its function with original fluid (or non-hazardous replacement fluid, e.g. water) for
commissioning and service checks.
The intrinsically safe circuits of the devices (light blue marking on the device) may be
routed into the potentially explosive area (observe the zones). The intrinsically safe
circuits must be installed in accordance with the applicable erection regulations and
with EN 60079-14.
4.3.2
Connector coding
All connectors are coded by Aquasant.
The labelled, coded connectors are equipped with push-in
terminals for quick wiring with stranded wires.
4.3.3
Eight-pole mounting rail bus connector
Increases the flexibility when using the enclosure:
Simply connecting individual control device enclosures to each
other using 8-pole mounting rail bus connectors with serial and
parallel contacts reduces the amount of work for wiring.
The bus connector is plugged together and clicked onto the top
hat rail. The bus connector stays in the DIN rail when the control
device is detached. The T-bus connector is used
Item No.: 21.01.32.187
to interconnect several AS2* DIN rail
devices. The 24 V DC power supply (for max. 10 devices), RS485
bus, fault signal contact and acknowledgement are looped
through.
The connector for the T-bus with a nominal cross-section of
0.5 mm², nominal current of 6A and rated voltage (III/2) of 160V,
is used to connect to the second DIN rail row or to the PLC.
Item No.: 21.01.32.187-1 connector
Item No.: 21.01.32.187-2 socket
