1 Introduction
1.1 General description
This manual contains information for the installation and operation of the PM4-BC Monitor. The
PM4 is a general purpose instrument which may be configured to accept inputs of:
Binary (SEt INPt function 5.27 set to bin)
BCD (SEt INPt function 5.27 set to bcd)
Gray code (SEt INPt function 5.27 set to GRAY)
Weighted binary (SEt INPt function 5.27 set to d.inP)
Scaled binary, BCD or Gray code (see USER SCLE function 5.36)
The inputs may be presented in parallel, strobed or addressed form. Twenty input lines plus two
GND lines are available. For BCD inputs, addressed, strobed or up to 4 digit parallel four of these
input lines can be allocated for use as remote decimal point or display hold.
Optional relays, serial communications, analog or digital retransmission may also be provided.
The PM4 series of Panel Mount Monitors are designed for high reliability in industrial applications.
The high brightness LED display provides good visibility even in areas with high ambient light
levels. The high contrast LCD displays provide good visibility and are ideal for battery powered
applications.
Full electrical isolation between power supply, input signals and retransmission output is 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 devices. Note
that the input signals themselves share a common ground.
Unless otherwise specified at the time of order, your PM4 has been factory set to a standard
configuration. The PM4 series instruments can be configuration and calibrated easily by the user.
Initial changes may require dismantling the instrument to alter PCB links, other changes are made
by push button functions.
1.2 Output options
•1, 3 or 6 optional relays rated 240VAC 5A (resistive load)
•Isolated analog retransmission configurable for 4–20mA, 0–1V or 0–10V
•Isolated RS485 or RS232 serial communications (ASCII or Modbus RTU)
•Isolated Digital output - binary or BCD up to 16 bit, NPN or PNP output types available
•Optional outputs are available in certain combinations only e.g. Extra relay plus RS232
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