1 Introduction
This manual contains information for the installation and operation of the PM4-AM Auto/Manual
Station.ThePM4-AM isa versatileinstrumentwhichmaybeconfiguredtoacceptinputsofDCvolts (0-1Vor
0-10V) or 4 to 20 mA DCor 3 wire slidewire and retransmit adirect or manually controlled analog output of
DC volts (0-1V or 0-10V)or 4 to 20mA. The instrument may be calibrated todisplay the input in engineering
units. A standard inbuilt relay provides an alarm/control function, an optional second relay and excitation
voltage may also be provided. Refer to Chapter 7 “Auto/Manual operation” for details of Auto/Manual
switching options.
Unless otherwise specified at the time of order, your PM4 has been factory set to a standard
configuration. Like all other PM4 series instruments the configuration and calibration is easily changed by
the user. Initial changesmay require dismantling the instrument to alter PCB links, other changes aremade
by push button functions.
Fullelectricalisolation betweenpower supply, input voltage or currentandretransmission outputis
provided by the PM4, thereby eliminating grounding and common voltage problems. This isolation feature
makes the PM4 ideal for interfacing to computers, PLCs and other data acquisition or control devices.
The PM4seriesof Panel Mount Monitorsare designed for high reliability in industrial applications.
The high brightness LEDdisplay provides good visibility, even in areas with high ambient light levels. The
wide combination of input to output voltage and current ranges allows the PM4 to perform a signal
conversion as well as Auto Manual function.
Page 3 of 30 PM4AMMAN-1.4-0
INPUT
4-20mA
0-1V
0-10V
0-100V
or Slidewire OUTPUT
4-20mA
0-1V
0-10V
INPUT
4-20mA
0-1V
0-10V
0-100V
or Slidewire OUTPUT
4-20mA
0-1V
0-10V
Pushbutton
Manual
Control
Pushbutton
Manual
Control
MANUAL MODE
The incoming signal
is buffered
(and rescaled if required)
and retransmitted.
The output can
be incremented or
decremented by
pressingthe front
panel arrow keypads.
F
1
2
3
4
P
100
75
50
25
0
667*5
%
%
P F
Process Units
5 6 3 @ 0
Auto
when lit
Auto
when lit Manual
when lit
Manual
when lit
