3.2
Transducer power supply
The standard internal power supply may be link selected to provide a regulated 5V or unregulated
9V or 18V to power the sensor.
The maximum current available is 25mA. The 9V and 18V
unregulated supplies are only available on the AC powered versions of this panel meter. Note that
no more than one link should be fitted in LK1 to LK4 i.e. either LK1 or LK2 or LK3 or LK4.
3.3
Count up/down operation
The SET input may be used in up count/down count operation of the totaliser. Control of mode
of operation is via the
S.INP
function and via the state of the SET input (open circuit or short
circuit to ground via link or contact closure). See
S.INP
function for description and operation
table.
3.4
Relay connections
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 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. The relay will close when power is removed.
3.5
WS-03102 and Rotapulse wiring and link settings
WS-03102 anemometer and Rotapulse flowmeter are commonly supplied with this model. Wiring
and link settings are as shown below:
WS-03102: Wiring - Anemometer WS REF terminal to PM4-TR GND terminal 8 and WS SIG
terminal to PM4-TR IN terminal 11. Shield to LD-TR GND terminal 8.
Input link settings: Links in are LK8 (DC), LK5 (LOWF), LK12 (FREQ) all other links are out.
Suggested settings:
6 of
PM4TRMAN-2.7-0
Содержание PM4-TR
Страница 8: ...8 of 58 PM4TRMAN 2 7 0...
Страница 10: ...3 9 Input circuit diagram 10 of 58 PM4TRMAN 2 7 0...