Dwyer PWD - Manual (Page 2)

If a metering pump is used that requires a connection other
than the LMI connector supplied, cut the LMI connector off.
Connect the PWD-W to the pump using the diagram below in
conjunction with the wiring diagram in the pump manual.
The input connector on the control mates with any three-pin
Dwyer® connector. (Dwyer® Meters or flow sensors to be used
with a PWD-W should be ordered with Dwyer® connector.)
1
2
3
GEnERAL InFoRMAtIon & SPEcIFIcAtIonS
Page 2 Page 3
InStALLAtIon & connEctIonS
The PWD-M is factory-mounted on the flow sensor. The PWD-
W is mounted by attaching it to the metering pump with the
included double-backed, pressure-sensitive tape. Alternatively,
the control can be wall mounted with screws using the mount-
ing brackets that extend out either side.
Designed for use as a meter accessory, the PWD divider is used
primarily for pacing electronic metering pumps. Any number
from one to 9999 can be set on rotary switches. Each time the
divider has received the set number of pulses from the meter,
it puts out one pulse to stroke the pump. The PWD is also
useful in boiler and cooling tower feed and bleed operations,
and for lowering frequency output of high frequency meters.
Compatible with all Dwyer Instruments Inc. pulse output flow
meters, the PWD creates a programmable pulse meter with
an easily adjustable pulse rate.
The PWD comes in two different housings: an enclosure that
can be mounted near the pump, and a watertight housing for
mounting on the meter.
FEAtURES
PWD-M
LMI Pump
SPEcIFIcAtIonS*
MoUntInG
connEctIonS
The PWD-M can be connected as shown.
PWD-W/LMI PUMP
The 24" pigtail that extends from the PWD-W connects to an
LMI metering pump and is connected as shown.
The input connector on the control mates with any three-pin
Dwyer® connector. (Dwyer® Meters or flow sensors to be used
with a PWD-W should be ordered with Dwyer® connectors.)
PD10W/LMI Pump
Sockets
1. Ground
2. Input Signal
3. Sensor Power
+7-30 Vdc*
Sockets
1
2 4
3
LMI Connector
(supplied with
PWD-W)
Dwyer®
Sensor
Connector
(order with
flow meter)
1. Auxiliary Power Source
2. Pulse Input
3. Ground
4. No Connection
PWD-W/non-LMI PUMP
PWD-W/non-LMI Pump
PWD
Red
Black
Green
White
7-30 Vdc
Ground
Signal +
Common
Wall (Pump) housing shown
(Meter mount also available)
Protective cover
Mounting Holes:
(Double-backed pressure-sensitive
tape also supplied standard)
Rotary Switches (4)
Potted for environmental
protection
Input connector for meter
To leads or metering
pump connector
PWD
Meter
Epoxy-encapsulated ABS housing with cover
Cast aluminum sealed housing
0 to 130˚F (-18 to 55˚C)
1 to 9999
Rotary switches
7 to 30 Vdc @ 4 mA
20 mA
350 Hz (pulses/second)
8 Hz (pulses/second)
Solid state relay; 0 to 250 V, 170 mA max AC/DC
0.1 second
Dwyer connector
Terminal
Pump connector on 24" lead
Comes with 18' lead
Enclosure Wall (Pump) Mount
Meter Mount
temperature
Divider Range
Setting Mechanism
Power
Maximum Sensor Load
Maximum Input Frequency
Maximum output Frequency
output
output Pulse Width
Input connection Wall Mount
Meter Mount
output connection Wall Mount
Meter Mount
*Specifications subject to change
PWD-M meter mounted version
Power for the PWD can be supplied by the metering pump if
the pump has a sensor power supply. Some pumps require
an external power supply, available from Dwyer Instruments
Inc. LMI pump and Dwyer® connectors are available.
cAUtIon:
Power supplies 18 Vdc and higher must be regulated to
prevent damage to the PWD caused by voltages exceeding
its 30 V allowable maximum supply voltage due to AC line
variations and light loading.
PoWER SoURcE
POWER
OUTPUT
+
–
+
–
*cAUtIon: If power is supplied to the flow sensor from the
PWD, ensure that the voltage supplied to the sensor does not
exceed the sensor's allowable maximum input voltage.
2
3 1
4
5
-Pc4 option -Pc5 option
Sockets
1. Remote On
2. Ground
3. Pulse Input
4. Aux. Power Source
5. Not Used
PWD-M
Dwyer® is a registered trademark of Dwyer Instruments Inc.