Electrical Installation; Dryer Supply; Dryer Auxiliary Connections - Parker PNEUDRI MXLE Guia Del Usuario

3.5 Electrical Installation

A fully qualified electrical engineer must undertake all field wiring and electrical work in accordance with local regulations.

3.5.1 Dryer Supply

Refer to the technical specification for voltage and frequency tolerances.
Remove the grommet from the pre drilled hole at the base of the control box
and fit an appropriate supply cable gland (not supplied). Feed the electrical
supply cable through the gland and connect it to the terminals of the isolator
located on the side of the control box.
Each wire should be terminated using suitable ferrules.

3.5.2 Dryer Auxiliary Connections

The MXLE dryer can be connected to external control and alarm circuits
using the dedicated terminals on the lower terminal block inside of the control
panel.
When making these connections it is recommended that:
Cable lengths do not exceed 30m in length.
1
Twisted screened cables are used for the remote stop / start and
2
retransmission connections.
Low voltage cables are routed away from high voltage supply cables
3
2
0.75mm cables should be used for remote start / stop and mains fault
4
circuits
Mains Fault Terminals
Each dryer is fitted with a set of volt free relay contacts designed for remote
alarm indication. These are normally open contacts and are rated 1A max @
250Vac (1A @ 30Vdc). Under normal operation the relay will be energised
and the alarm circuit will be closed. When a fault occurs, e.g. power failure,
the relay will de-energise causing the alarm circuit to be open.
Connection should be made between terminals 41 and 42.
If the remote alarm indication relay is used, the
electrical enclosure will contain more than one live
circuit. The relay connections will remain live when
the mains supply is disconnected.
Remote Start / Stop (Standby)
The operation of the dryer can be controlled remotely using an external
latching switch (not supplied).
Connection should be made between terminal 6 and 24V.
Open = Stop, Closed = Start.
To complete the remote Start/Stop function, disconnect the wire from terminal
1 of the PLC and connect to terminal 3.
For the remote Start/Stop to function correctly, press the local Start/Stop to
"ON" - remote control is now active.
Switching off the local switch will stop the dryer
Retransmission
A 4 – 20mA linear analogue output is available for the optional
re-transmission of dewpoint readings.
Connection should be made between terminals 54 and 55.
18
6
1 Pre drilled hole for electrical supply cable entry
2 Electrical supply isolator
3 Cable glands for auxiliary cables
4 Auxiliary connections
5 Pre-wired pump supply cable
6 PLC Input terminals