3 Electrical installation
3.1 Electrical installation
The PM4 Panel Meter is designed for continuous operation and no power switch is fitted to the
unit. It is recommended that an external switch and fuse be provided to allow the unit to be
removed for servicing.
The plug in, screw type, terminal blocks allow for wires of up to 2.5mm
2
to be fitted. Connect the
wires to the appropriate terminals as indicated below. Refer to connection details provided in this
chapter to confirm proper selection of voltage, polarity and input type before applying power to
the instrument.
When power is applied the instrument will cycle through a display sequence indicating the software
version and other status information, this indicates that the instrument is functioning. Acknowl-
edgement of correct operation may be obtained by applying an appropriate input to the instrument
and observing the reading. The use of screened cable is recommended for signal inputs.
For connection details of optional outputs refer to the separate ”PM4 Panel Meter Optional Output
Addendum” booklet supplied when options are fitted.
MAINS EARTH
AC ACTIVE
AC NEUTRAL
COM
RELAY 1
N/O
EXT-IN
TRANSMITTER
SUPPLY +
(18VDC REGULATED,
25mA MAXIMUM)
GND
INPUT -
INPUT +
TYPICAL TOP CONNECTOR
LAYOUT FOR OPTION BOARD
(DC+)
(DC-)
SETUP
PUSHBUTTONS
A
B HC D E F J K
1 2 3 4 5 6 7 8 9 10 11
F
^ v
1
3
2
5
6
9
7
10
8
11
RELAY 1
RELAY 1
MAINS EARTH
240VAC NEUTRAL
240VAC ACTIVE
EXT IN
SUPPLY +18VDC
INPUT +VE
INPUT -VE
GND
PM4-IV-240-5E
SERIAL No.
COM
N/O
Instrument data label (example)
PM4IVMAN-2.4-0 5 of 56
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