Page 31 - Seametrics Product Catalog 2015_062415

Connections. Remove the PS40 cover to access the provided that the polarity is correct. The relay output is
terminals. Follow the Connections diagram. Use the included identified by its terminals marked NO (normally open), COM
nuts to secure the strain reliefs on the inside of the enclosure (common), and NC (normally closed). The relay output will
before connecting to the terminals. operate essentially everything, including the very rare pump
Power. A DC power supply of 10 to 32 Vdc is required. Con- or control that will only work with dry contact.
nect the +V and -V terminals to the DC + and - as shown.
Sensor. If using a two-wire (e.g., MJR meter), note which two Caution: The relay output is designed for
of the three terminals are to be used. Either of the sensor electronic controls only. Maximum current
wires can be connected to either of these two terminals. load is 250 mA.
Three-wire sensors (e.g., MJE meters) are polarity-sensitive High Speed Input. It may be occasionally desirable to
and must be connected to the appropriate terminals by use the PS40 with a high-speed input, such as an IP800
standard Seametrics color code: red is +, black is - , and paddlewheel flow sensor. If the sensor will be putting out
white is Signal. more than 50 pulses per second, it is necessary to disable
Output. Three of the outputs are transistor, the fourth is the relay output, which cannot operate at such high speeds.
relay. The transistor outputs will operate almost all pulse- To do this, clip the jumper marked JP1 (see diagram). Note
responsive metering pumps and all Seametrics controls, that the relay output terminals cannot be used in this case.

CONNECTIONS

10-32 Vdc
power supply

MJE METER +Vdc JP1
MJR METER- -Vdc
TWO-WIRE JP1
CONNECTION +12V Clip this jumper for
SIG high speed operation
GND

+12V
SIG
GND

+OP RED +OP RED NC Do not use for high
-OP BLACK -OP BLACK COM speed operation
NO
+OP RED
-OP BLACK RED
BLACK

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