User Manual

Ordering
1 PXM20-E operator unit
Compatibility
Device
Type
Data sheet
Modular automation stations
PXC...-U
9221
Compact automation stations
PXC....E-D N9215
Modular automation stations
PXC....E-D N9222
Accessories
Description
Type
Connection cable
(CAT5), length 3.0 m (order separately) PXA-C1
Adapter RS232 – RJ45 to connect a PXA-C1 to a PC (order separately)
PXA-C2
Adapter on PXM20-E for firmware download (order separately)
PXA-C4
Mounting frame for mounting on the wall or on the control panel door (order separately)
PXA-H1
Design
The PXM20-E operator unit is contained in a robust plastic housing, ideally suited for its
many different mounting methods.
All indicators and controls are mounted on the front cover of the unit (see page 2).
The connections for the automation stations are incorporated on the back of the unit
(see page 7).
Mounting instructions
The PXM20-E is suitable for control panel front mounting or vertical panels (e.g. remote
operating panels or similar units). The unit is also suitable for DIN rail snap-mounting.
In addition, the PXM20-E can be mounted direct on any modular automation station.
The required Ethernet network connection is an anti-kink cable which can be introduced
through an aperture in the modular automation station.
Commissioning
• The device only supports I/Os that are not configurable, i.e. dedicated I/Os on
compact automation stations and I/Os on PTM modules. No support of UIs and I/Os
on TX-I/O modules.
• Therefore the preferred method for wiring test is the Point Test Tool.
Commissioning before programming:
The wiring test supports the reading of all I/Os of compact automation stations, and
modular – as long as the modules have an address key. In addition the wiring test
supports writing to all outputs. This means you can switch on fans, pumps, lamps etc.,
or drive valves to a defined position.
The outputs keep their state as long as the automation station is powered.
It is possible to download firmware via FTP.
Wiring test
Switchless
commissioning
Firmware download
5/8
Siemens Operator unit PXM20-E CM1N9234en_4
Building Technologies 2015-01-06