Seametrics PS40 Data sheet
9 001:2008
CERTIFIED COMPANY
ISO
FEATURES
• Rugged ABS plastic housing
• Optoisolated Transistor
and relay outputs
APPLICATIONS
• Cooling tower/boiler water treatment
• Pacing chemical metering pumps
• Driving multiple pumps, counter timers,
remote totalizers
PS40
Pulse Splitter
GENERAL INFORMATION
The PS40 is a low-voltage device that allows a Seametrics
ow sensor to drive multiple (up to four) pulse-responsive
devices, such as solenoid-driven chemical metering pumps,
counter timers, or remote totalizers. It requires an external
DC power supply for operation and can provide power to a
single low power Seametrics ow sensor, such as an MJE
meter. It can also be used with a dry contact sensor, such
as the MJR reed switch meter.
SPECIFICATIONS*
Power
Relay
Optoisolation
Outputs
*Specications subject to change • Please consult our website for current
data (www.seametrics.com).
10 - 36 Vdc
Operational frequency = 50 Hz max
Contacts = 250 mA max, 36 Vdc max, 3W max
10 mA max @ 30 Vdc max
Three open collector optoisolated
One Form C relay
DIMENSIONS
4.462”
[113.33mm]
4.625”
[117.48mm]
5.130”
[130.30mm]
00.190”
[04.83mm]
1.107”
[28.12mm]
2.845”
[72.26mm]
PS40
Pulse Splitter
Connections. Remove the PS40 cover to access the terminals.
Follow the Connections diagram. Use the included nuts to
secure the strain reliefs on the inside of the enclosure before
connecting to the terminals.
Power. A DC power supply of 10 to 36 Vdc is required. Connect
the +V and -V terminals to the DC + and - as shown.
Sensor. If using a two-wire (e.g., MJR meter), note which two of
the three terminals are to be used. Either of the sensor wires
can be connected to either of these two terminals. Three-wire
sensors (e.g., MJE meters) are polarity-sensitive and must be
connected to the appropriate terminals by standard Seametrics
color code: red is +, black is - , and white is Signal.
Output. Three of the outputs are transistor, the fourth is relay.
The transistor outputs will operate almost all pulse-responsive
metering pumps and all Seametrics controls, provided that the
polarity is correct. The relay output is identied by its terminals
CONNECTIONS
marked NO (normally open), COM (common), and NC (normally
closed). The relay output will operate essentially everything,
including the very rare pump or control that will only work with
dry contact.
Caution: The relay output is designed for
electronic controls only. Maximum current
load is 250 mA.
High Speed Input. It may be occasionally desirable to use the
PS40 with a high-speed input, such as an IP80 paddlewheel
ow sensor. If the sensor will be putting out more than 50
pulses per second, it is necessary to disable the relay output,
which cannot operate at such high speeds. To do this, clip the
jumper marked JP1 (see diagram). Note that the relay output
terminals cannot be used in this case.
10-36 Vdc
power supply
+Vdc
+OP
RED
-Vdc
-OP
BLACK
+OP
RED
NO
COM
BLACK
JP1
NC
RED
MJE METER
MJR METERTWO-WIRE
CONNECTION
GND
SIG
+12V
GND
-OP
BLACK
SIG
+OP
RED
+12V
-OP
BLACK
Seametrics Incorporated • 19026 72nd Avenue South • Kent, Washington 98032 • USA
(P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • www.seametrics.com
JP1
Clip this jumper for
high speed operation
Do not use for high
speed operation
LT-65650018-C
5/16/07
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