Basic Controls—System 350 P352AB Electronic Pressure Control Series Product/Technical Bulletin
5
D352 Digital Pressure Display Module
The D352 Display Module receives power, sensor, and
setpoint information from the P352AB control. A
three digit Liquid Crystal Display (LCD) gives a
continuous readout of the sensed pressure. Pushing
the PRESS FOR SETPOINT button displays the
setpoint of the adjoining P352AB control. The button
must be pressed for approximately three seconds.
(Refer to the
System 350
TM
Display Modules
Product/Technical Bulletin, LIT-930070,
for more
information.)
S352A Pressure Stage Modules
The S352A Stage Modules receive power, setpoint,
and sensor input from the P352AB controls. As many
as five S352A Stage Modules can plug into the
P352AB controls when powered by the Y350R Power
Module. When powered by an external transformer,
the P352AB controls can use up to nine S352A Stage
Modules. (Refer to the
System 350
TM
S350A
Temperature, S351A Humidity, and S352A Pressure
Stage Modules Product/Technical Bulletin,
LIT-930080,
for more information.)
Note:
When using an external transformer, the
Y65 Series or other 40 VA Class 2
transformers are recommended.
!
CAUTION: Verify that the jumpers are in the
proper position before powering
System 350 components. If the
jumpers on the P352AB control
or the S352A Stage Module are
in the wrong position, the device
will activate the relay in response
to the opposite signal. The
DA/RA relay will remain
energized until the error is
corrected.
A
djustments (S352A Stage Module)
Perform the following steps to adjust the S352A stage
module settings. (See Figure 4.) Refer to Figure 5 for
an illustration of the S352A Stage Modules in a typical
Direct Acting/Reverse Acting application.
!
WARNING:
Risk of Electrical Shock.
Disconnect power supply to
avoid possible electrical shock or
equipment damage. More than
one disconnect may be required
to completely de-energize
equipment.
1. Ensure all power to system is off.
Each stage module may be receiving separate
power sources. Make sure all power sources to
each stage module are off.
2. Remove the stage module cover by loosening the
four captive cover screws.
3.
Set the mode of operation
by positioning the
jumpers (at Jumper Terminal J2) horizontally for
Direct Acting or vertically for Reverse Acting.
4.
Adjust the differential
using the potentiometer
marked DIFF to the desired setting.
5.
Adjust the offset
using the potentiometer marked
OFFSET to the desired pressure from the P352AB
control setpoint at which the stage relay will
de-energize (above setpoint with Direct Acting
mode selected or below setpoint with Reverse
Acting mode selected).
6. Replace the S352A stage module cover and
tighten the captive cover screws.
7. Restore power to system.
Module
Connector
Relay Energized
LED Indicator
Offset
Potentiometer
Differential
Potentiometer
Module
Connector
Jumper
Position at J2
Reverse Acting
Direct Acting
N.C.
Relay
N.O.
Terminals
COM
Output
Cover Screw
(One of Four)
Relay
Figure 4: Interior View and Typical Wiring
of the S352A Stage Module