4 .1
RTD connection ex am ples
4 .2
Power sup ply con nec tions
The power supply for the instrument is factory fitted and is of a fixed type. If you are unsure of the
supply requirement for your instrument it can be determined by the model number on the instrument label:-
PM4-RT8-240-...... Requires 240VAC
PM4-RT8-110-...... Requires 110VAC
PM4-RT8-24-...... Requires 24VAC
PM4-RT8-DC-..... Requires between 12 and 48VDC
PM4-RT8-DCH-..... Requires between 50 and 110VDC
4 .3
Re lay con nec tions
The PM4 is supplied with one alarm relay as standard with connections on terminals 5 and 6. Extra
relays are optionally available. The relay is a single pole, single throw type (form A) and is rated at 5A,
240VAC into a resistive load. The relay contact is voltage free and may be programmed for normally open or
normally closed operation.
4 .4
Re mote input con nec tions
Terminals 7 & 8 are the remote input terminals. The operation selected by the
R.INP
function is
activated when terminals 7 & 8 are shorted via switch, relay etc.
Page 7 of 27
PM4RT8MAN-1.4-0
RTD1
RTD2
RTD3
RTD4
GND
7
13
8
14
9
15
10
16
11
17
12
18
Example - 4 x 2 wire RTD
RTD1
RTD2
RTD3
GND
GND
GND
3W
3W
3W
RTD
RTD
RTD
7
13
8
14
9
15
10
16
11
17
12
18
Example - 3 x 3 wire RTD
