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FANs 930, 930.5, 125

Product/Technical Bulletin P352P

Issue Date 0296

Part No. 24-7664-486, Rev. —

Code No. LIT-930042

System 350

P352P Electronic Proportional Plus Integral

Static Pressure Controls

The P352P is an electronic proportional only or

proportional plus integral static pressure control with

0 to 10 VDC and 0 to 20 mA anolog outputs. The P352P is

also equipped with three user-selectable integration

constants, as well as a wide adjustable throttling range.

Two models cover the ranges of

0.5 to 5 in. W.C. and 0.025 to 0.25 in. W.C.

Like all System 350 products, the P352P is housed

in a NEMA 1 high-impact thermoplastic enclosure. The

modular design provides easy, snap-together connections

for quick installation and future expandability.

Figure 1: P352P Electronic Proportional Plus Integral

Pressure Control

Features and Benefits

Modular Design Provides the flexibility to add a D352 Pressure Display Module and a

Y350R Power Module

Plug-in Connectors and 35 mm DIN

Rail Mountability

Eliminates wiring between modules and reduces installation costs

Two Models Cover a Wide Setpoint

Range of 0.5 to 5 in. W.C. or 0.025

to 0.25 in. W.C.

Reduces inventory by encompassing pressure ranges required to

support most static pressure control applications

Minimum Output Adjustable from 0

to 60%

Tailors the output to the requirements of the controlled equipment

Adjustable Throttling Range of 0.5

to 5 in. W.C. or

0.025 to 0.25 in. W.C.

Enables user to match the amount of control (maximum to

minimum) required for a given application

Field-selectable Reverse or Direct

Acting Mode

Works in a variety of pressure applications

Three User-selectable Integration

Constants

Adjusts output to bring process to setpoint regardless of system load

Interchangeable Pressure

Transmitters

Increases versatility and serviceability

Summary of content (12 pages)

PAGE 1
FANs 930, 930.5, 125 Product/Technical Bulletin P352P Issue Date 0296 System 350TM P352P Electronic Proportional Plus Integral Static Pressure Controls The P352P is an electronic proportional only or proportional plus integral static pressure control with 0 to 10 VDC and 0 to 20 mA anolog outputs. The P352P is also equipped with three user-selectable integration constants, as well as a wide adjustable throttling range. Two models cover the ranges of 0.5 to 5 in. W.C. and 0.025 to 0.25 in. W.C.
PAGE 2
A pplication Overview O peration The P352P Pressure Controls can be used as stand alone devices or in conjunction with plug-in accessory modules to control variable speed drives, motor actuators, or other devices. The P352P Static Pressure Controls are not typically used with staging modules. Consult Johnson Controls Application Engineering for specific information if a question regarding a specific application arises.
PAGE 3
Minimum Output Adjustment This adjustment is used to set the minimum voltage or milliampere (mA) output that the P352P will provide. It can be set from 0 to 60% (up to 6 VDC or up to 12 mA). Example: A controlled device that responds to a 4 to 20 mA output would require that the minimum output be adjusted to 20% or 4 mA (see Figure 3). The “MIN OUTPUT” adjustment is located on the lower circuit board to the right of the throttling range potentiometer.
PAGE 4
• C2 (Switch 3 to On position, all others Off)selects a five minute integration constant. If the rate of system recovery to setpoint is sluggish with the control set to C3 and it is determined that the system has enough capacity to drive the process to setpoint at a faster rate, the C2 setting may be used. • C1 (Switch 4 to On position, all others Off)is the fastest integration constant (equal to 2.5 min.).
PAGE 5
D imensions 0.145 Mounting Slot 3.68 for No. 6 Screws 0.5 13 2.94 75 5.00 127 DIN Rail Mount 1.56 40 P352P 2.40 61 0.42 11 1.20 31 2.40 61 0.85 22 0.875 Conduit Hole 22 Figure 6: P352P Dimensions, in.
PAGE 6
I nstallation and Wiring The P352P is housed in a compact NEMA 1 plastic enclosure designed for standard 35 mm DIN rail mounting. The P352P is not position sensitive but should be mounted for convenient wiring and adjustment. Four key-slot mounting holes on the back of the control case are provided should surface mounting be required. Note: When mounting the P352P (or any System 350 Module) to rigid conduit, attach the hub to the conduit before securing the hub to the control enclosure.
PAGE 7
A dd-on Modules The D352 Digital Pressure Display Module and Y350R Power Module are designed to connect together and plug into the P352P, via a connector on its right side. The preferred order of the modules is (from left to right) control module, power module, and display module. 4. D352 Pressure Display Module The D352 receives its power, pressure, and setpoint information from the P352P. A three-digit Liquid Crystal Display (LCD) gives continuous read-out of the sensed pressure.
PAGE 8
C heckout Procedure 1. 2. 3. 4. Before applying power, make sure installation and wiring connections are according to job specifications. After necessary adjustments and electrical connections have been made, put the system in operation and observe at least three complete operating cycles to determine that the system is stable. If integration is required, select the C1, C2, or C3 integration constant. C3 is the recommended initial setting. (Refer to the Integration Constantsection.
PAGE 9
3. Transmitter "OUT" Voltage (VDC) Adjust the minimum output from 0 to 60% by turning the potentiometer completely clockwise. Note: As the potentiometer is adjusted in the clockwise direction, the P352P’s “V” output voltage should go from 0 to 6 VDC and the “I” output current should go from 0 to 12 mA. The LEDs should turn on, one at a time, from left to right (until LED 6 is on). If the LEDs do not come on or the “V” or “I” outputs do not change as described above, replace the P352P.
PAGE 10
R replacement controls are available through local Johnson Controls representatives. epairs and Replacement Do not make field repairs or perform calibration. The DPT-2640 Differential Pressure Transmitter and Table 3: Ordering Information Item Product Code Number Description P352P Proportional Plus Integral Pressure Control P352PQ-1C P352PQ-2C Setpoint Range: 0.5 to 5 in. W.C.; Throttling Range: 0.5 to 5 in. W.C. Setpoint Range: 0.025 to 0.25 in. W.C.; Throttling Range: 0.025 to 0.25 in. W.C.
PAGE 11
Notes System 350 P352P Electronic Proportional Plus Integral Static Pressure Controls 11
PAGE 12
S pecifications Product Sensor Input Range Setpoint and Throttling Range Supply Voltage* Analog Output P352P Electronic Proportional Plus Integral Static Pressure Controls P352PQ-1C: 0 to 10 in. W.C. corresponding to 0 to 5 VDC P352PQ-2C: 0 to 0.5 in. W.C. corresponding to 0 to 5 VDC P352PQ-1C: 0.5 to 5 in. W.C. P352PQ-2C: 0.025 to 0.25 in. W.C. AC Supply: 20-30 VAC Class 2, 50/60 Hz, 5 VA max. Y350R Power Module: See Add-on Modules below. DC Supply: 22 to 29 VDC at 50 mA max.