Johnson Controls Penn System 350 S350P Manuale utente

FANs 930, 930.5

Add-On Modules Section

Product/Technical Bulletin S350P

Issue Date April 8, 2014

Part No. 24-7664-1202, Rev. A

Code No. LIT-930086

The S350P is used in conjunction with the A350

Temperature Control to add proportional or

proportional plus integral staging capability. The

S350P is an electronic control with analog 0 to 10

VDC and 0 to 20 mA outputs.

As with all System 350 products, the S350P is housed

in a NEMA 1, high-impact plastic enclosure. The

modular design provides easy, plug-in connections for

quick installation and future expandability.

Figure 1: S350P Electronic Proportional Plus Integral

Temperature Stage Module

Features and Benefits

Plug-in Connectors and

35 mm DIN Rail Mountability Eliminates wiring between modules and reduces

installation costs

Proportional or Proportional

Plus Integral Output

Adds proportional or proportional plus integral

staging capability to all A350 Temperature

Controls

Minimum Output Adjustable

from 0 to 60% Tailors the output to the requirements of the

controlled device; can also be used to set

minimum valve or damper position

Adjustable Throttling

Range of 2 to 30F° (1 to 17C°) Enables the user to tune the system for optimum

performance

Field-selectable Reverse

or Direct Acting Mode Works in heating or cooling applications

Three User-selectable

Integration Constants

Provides selection of the integration constant for

applications requiring proportional and integral

control

Light-Emitting Diode (LED)

Bar Graph Display of Output Aids in adjustment, tuning, and troubleshooting

System 350

S350P Proportional Plus Integral Temperature Stage Module

2 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin

Application Overview

The S350P Proportional Stage Module must be used

in conjunction with an A350 Temperature Control. The

S350P receives its power, setpoint, and sensor inputs

from the A350. The S350P adds a proportional or

proportional plus integral output to the A350 control.

The maximum number of stages that can be used in a

system varies with the type of control module (on-off,

proportional, or reset), type of stage module (on-off,

slave, or proportional), and type of power supply

(external transformer or Y350R). Use the following

table to determine the maximum number of stages that

may be used with each control module.

Table 1: Maximum S350 Stage Modules per

Control Module

Control

Maximum

S350A or

S350C

Stage

Modules

Maximum

S350A or

S350C

(with 1

S350P)

Maximum

S350A or

S350C

(with 2

S350P)

A350A,

A350B,

A350E,

A350R,

A350S

(using

Y350R)

9 6 4

A350P

(using

Y350R)

4 2 N/A

Any A350

(using

external

40 VA

transformer)

9 8 7

Operation

IMPORTANT: Use this A350P Proportional Plus

Integral Temperature Stage Module

only as an operating control. Where

failure or malfunction of the module

could lead to personal injury or

property damage to the controlled

equipment or other property,

additional precautions must be

designed into the control system.

Incorporate and maintain other

devices, such as supervisory or alarm

systems or safety or limit controls,

intended to warn of or protect against

failure or malfunction of the module.

IMPORTANT: Utiliser ce A350P Proportional Plus

Integral Temperature Stage Module

uniquement en tant que dispositif de

contrôle de fonctionnement.

Lorsqu'une défaillance ou un

dysfonctionnement du module risque

de provoquer des blessures ou

d'endommager l'équipement contrôlé

ou un autre équipement, la conception

du système de contrôle doit intégrer

des dispositifs de protection

supplémentaires. Veiller dans ce cas

à intégrer de façon permanente

d'autres dispositifs, tels que des

systèmes de supervision ou d'alarme,

ou des dispositifs de sécurité ou de

limitation, ayant une fonction

d'avertissement ou de protection en

cas de défaillance ou de

dysfonctionnement du module.

The S350P is powered by the A350, and provides

two simultaneous analog outputs: 0 to 10 VDC and

0 to 20 milliamperes (mA). A cover-mounted,

ten segment LED bar graph indicates the percentage

of output currently in use. S350P features include:

 adjustable offset

 selectable Reverse Acting (RA) or Direct Acting

(DA) mode of operation

 adjustable throttling range (proportional band)

 adjustable minimum output

 selectable integration constant

Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 3

THR OT

MIN

SET

Cover Screws

(Quantity = 4)

Integration DIP Switch

LD Indicator

(Percent of Output)

Module

Connector

Operation Mode

Jumper Positions

Reverse

Acting

Direct

Acting

Slow

Off Medium

Fast

Figure 2: Interior View Illustrating S350P Features

Offset

The offset can be adjusted from 0 to 30F° (0 to 17C°).

The offset adjustment determines the amount of offset

between the A350’s setpoint and where the S350P’s

throttling range begins (refer to Figure 5). This

adjustment is made using the potentiometer marked

OFFSET located at the upper portion of the circuit

board (refer to Figure 2).

Mode of Operation

(Direct Acting or Reverse Acting)

When configured for Reverse Acting (RA) operation,

the analog output increases as the temperature drops

below the value of the A350’s setpoint minus the

S350P’s offset (refer to Figure 3).

When configured for Direct Acting (DA) operation, the

analog output increases as the temperature rises

above the value of the A350’s setpoint plus the

S350P’s offset (refer to Figure 3).

Select the RA/DA mode by positioning the operation

mode jumpers either vertically or horizontally (refer to

Figure 2). Position the operation mode jumpers

vertically for Reverse Action (RA) or horizontally for

Direct Action (DA).

As shipped from the factory, the RA/DA operation

mode jumpers are installed in the RA mode.

Throttling Range

A350

Setpoint Minus

S350P Offset

510 15 20 25 30

15202530

Throttling Range

RA DA

A350

Setpoint Plus

S350P Offset

VDC

Figure 3: Direct or Reverse Acting Proportional

Bands Shown in “Proportional Only” Mode

(Shaded Area Shows Throttling Range Possibilities

from Minimum to Maximum)

Throttling Range (Proportional Band)

The throttling range can be adjusted from

2 to 30F° (1 to 17C°). Make the adjustment at

the throttling range potentiometer marked

THROT RANGE (refer to Figure 2 ).

4 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin

Included with the S350P is a Celsius scale throttling

range decal. If the Celsius scale is desired:

1. Use a small screwdriver to pry underneath the

existing decal and remove it along with the

throttling range, minimum output, and offset

potentiometer knobs.

2. Apply the Celsius scale decal where the original

decal was located.

3. Rotate all knob stems completely

counterclockwise.

4. Reinstall the potentiometer knobs so the arrows

are at the furthest counterclockwise scale position

(refer to Figure 2).

Minimum Output Adjustment

The minimum output adjustment sets the minimum

voltage or milliampere output provided by the S350P.

It can be adjusted from 0 to 60% (0 to 6 VDC or

0 to 12 mA) of the output range.

Example: A controlled device responding to a

4 to 20 mA output would require the minimum output

to be adjusted to 20% or 4 mA (refer to Figure 4). The

minimum output adjustment may also be used to set

valves or dampers to minimum position.

Make the adjustment at the minimum output

potentiometer marked as MIN OUTPUT (Figure 2).

For each 10% increase in range, one bar on the LED

indicator appears.

Note: Before setting the minimum output

potentiometer, be sure the control is not

generating an analog output signal.

246

0Deviation Above Setpoint

Output (mA)

810121416 18 20

50%

20%

Figure 4: Output vs. Deviation from Setpoint for:

Minimum Output = 0, 20, and 50%,

Throttling Range = 20°F

Direct Acting

Minimum

Output =20%

Throttling

Range = 6

20%

40%

60%

80%

100%

% Output

S350P Calculated

Setpoint = 76

72 74 76 78 80 82 84

A350

Setpoint = 72

Direct

Acting

Temperature

Offset = 4

Figure 5: Example of S350P Adjustments

Integration Constant

Proportional only controls cannot hold a process at the

exact setpoint. A proportional offset is always present

because the control output is 0% at setpoint. Any load

on the system causes the control point to be offset

from the setpoint. The greater the load on the system,

the further the control point offsets from the setpoint

(this is commonly referred to as proportional offset)

and under maximum load this error approaches the

throttling range.

Some proportional only controls are designed with

their setpoint located midway through the proportional

band to help compensate for the offset. This results in

a plus/minus error from the setpoint rather than a

single-ended error.

The S350P has an integration feature that forces the

control point to match the S350P calculated setpoint.

Over time, the S350P controls the heating/cooling

equipment to balance the system load at the

calculated setpoint (refer to Figure 6).

Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 5

On traditional proportional plus integral controls, the

amount of correction becomes too large if the system

load exceeds the capacity of the equipment. When

the actuated device (valve or damper) is fully open or

closed and the setpoint still cannot be reached, the

integration error continues to grow. The result is

called integral windup. The S350P avoids integral

windup with a patented circuit that puts a dynamic

ceiling on the integrator. This circuit resets the

integration error when the sensor goes just above the

calculated setpoint plus the throttling range (in DA

mode) or just below the calculated setpoint minus the

throttling range (in RA mode). This allows the process

to recover from an out-of-range condition without a

large overshoot.

The S350P has three field-selectable integration

constants and an off position. The integration DIP

switch selects the integration constant. (Refer to

Figure 2 for location.) The field-selectable integration

constants include:

 Off (Switch 1 to On position, all others Off)

Provides proportional only operation.

 Slow (C3) (Switch 2 to On position, all others

Off) This is the slowest integration constant

(equal to 26 minutes) and is suitable for most

proportional plus integral applications. Slow is the

recommended initial setting.

 Medium (C2) (Switch 3 to On position, all

others Off) Selects a 13-minute integration

constant. If the rate of system recovery to setpoint

is sluggish with the control set to slow, and if the

system has enough capacity to drive the process

to setpoint at a faster rate, the medium setting

may be used.

 Fast (C1) (Switch 4 to On position, all others

Off) This is the fastest integration constant

(equal to 6.5 minutes). Use the fast setting only in

instances where the rate of change at the sensor

is extremely rapid and system capacity can

compensate for that rapid change.

Proportional Only Control

Proportional Plus Integral Control

Load Change

System Load

Integration adjusts the

proportional output to

bring the process to

setpoint regardless of load.

Load Change

System Load

Control Point

Follows the Load

Temperature

S350P

Calculated

Setpoint

Time

Throttling

Range

Error

Proportional

Offset

Error

Proportional

Offset = 0

S350P

Calculated

Setpoint

Figure 6: Operation of Proportional Only vs. Proportional Plus Integral Control

6 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin

Dimensions

Mounting Slot

for No. 6 Screws

0.145

3.68

0.5

2.94

DIN Rail

Mount

1.56

0.42

5.00

127

2.40

0.85

0.875

Conduit

Hole

S350P

Figure 7: S350P Dimensions, in./mm

Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 7

Installation and Wiring

The S350P Temperature Control is housed in a

compact NEMA 1 plastic enclosure designed for

standard 35 mm DIN rail mounting. The S350P 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 S350P (or any

System 350 module) to rigid conduit, attach

the hub to the conduit before securing the

hub to the control enclosure.

CAUTION: Risk of Electrical Shock.

Disconnect the power supply before making

electrical connections to avoid electric shock.

MISE EN GARDE: Risque de décharge

électrique.

Débrancher l'alimentation avant de réaliser tout

raccordement électrique afin d'éviter tout risque de

décharge électrique.

CAUTION: Risk of Property Damage.

Do not apply power to the system before checking

all wiring connections. Short circuited or

improperly connected wires may result in

permanent damage to the equipment.

MISE EN GARDE: Risque de dégâts matériels.

Ne pas mettre le système sous tension avant

d'avoir vérifié tous les raccords de câblage. Des

fils formant un court-circuit ou connectés de façon

incorrecte risquent d'endommager

irrémédiablement l'équipement.

 Install all wiring to conform to the National

Electrical Code and local regulations. For

maximum electrical rating of control, refer to the

label inside the control cover. Only use copper

conductors.

 The S350P can produce a variable signal from

0 to 10 VDC or 0 to 20 mA. (Both outputs can

be used simultaneously.) Connections are

made to the terminal block located in the wiring

compartment at the bottom of the case.

 Connections can be made to both the voltage

and milliampere outputs, allowing the S350P to

drive two outputs off the same RA or DA ramp

simultaneously. This feature can be used to

drive motor actuators of several different types

in a single application.

Table 2: Terminal Designations

Terminal

Designation Terminal

Description

V 0 to 10 VDC output

COM Common

I 0 to 20 mA output

Adjustments

Follow these procedures to set up the S350P for the

types of operation desired.

1. Remove S350P cover by loosening the

four cover screws (Figure 2).

2. Set the RA/DA operation mode jumpers to the

desired mode of operation. Position the

operation mode jumpers vertically for RA

(Reverse Acting) or horizontally for DA (Direct

Acting) (Figure 2).

3. Adjust the offset potentiometer to the number of

degrees from the A350 control’s setpoint that

the S350P begins throttling. Clockwise rotation

increases offset.

4. Adjust the throttling range potentiometer to

desired setting. Rotate clockwise to increase

the throttling range.

Note: Included with the S350P is a Celsius

scale throttling range decal. Refer to

the Throttling Range (Proportional

Band) section of this bulletin for decal

installation instructions.

If the S350P is to be used in proportional plus

integral mode, the initial throttling range

adjustment is seldom set below 6F° (3C°). A

narrow proportional band used in conjunction

with the integration may result in unstable

control.

5. If minimum output is required, set the minimum

output potentiometer (labeled MIN OUT) to the

desired position (Figure 2). Output can be read

with a voltmeter or can be adjusted using the

ten segment, front panel LED.

8 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin

Note: Before setting the minimum output

potentiometer, be sure the control is not

generating an analog output signal.

For each 10% increase in range, one bar lights

on the LED bar graph. In a milliampere

application, each bar equals 2 mA. In a voltage

application, each bar equals 1V. (Refer to

Figure 4 for an example.)

Example: To set the S350P for a minimum

output of 4 mA, turn the minimum output

potentiometer clockwise until the second LED

segment lights. Slowly rotate the potentiometer

counterclockwise just until the second segment

disappears.

6. Make sure the system is stable in the

proportional mode before selecting integration.

Refer to Checkout Procedure.

7. Reinstall the cover and secure in place with the

four cover screws.

Checkout Procedure

Follow this procedure to ensure the S350P is

connected and functioning properly.

1. Before applying power, make sure that the

installation and wiring connections comply with

job specifications.

2. Set the system for the proportional mode and

tune it for stable operation.

3. After making adjustments and electrical

connections, put the system into operation and

observe at least three complete operating cycles

to determine that the system is stable.

4. If integration is required, select the Fast (C1),

Medium (C2), or Slow (C3) integration constant.

Slow is the recommended initial setting. (Refer

to the Integration Constant section of this

bulletin.)

5. Observe operation and make additional

adjustments as necessary to obtain stable

control.

Troubleshooting

If the control system does not function properly,

verify the proper operation mode is selected on each

module (e.g., RA/DA) and perform the following:

1. Check for proper voltage applied to the A350

control.

a. Connect a Digital Voltmeter (DVM) between

the 24V (+) and C (-) terminals located on

the A350’s left side terminal block.

If an external transformer is used, select

AC volts on the DVM and verify that the

voltage is between 20 and 30 VAC.

If a Y350R Power Module is used,

select DC volts on the DVM and verify

that the voltage is between 16 and 38

VDC.

If an external DC power supply is used, select

DC volts on the DVM and verify that the voltage is

between 22 and 29 VDC.

b. If the DVM voltage is within the indicated

voltage range, proceed to Step 2.

c. If the DVM voltage is not within the

indicated voltage range, check wiring, and

then replace the Y350R or the external

transformer.

2. Check temperature sensor for proper

resistance.

a. Take an independent temperature reading

at the sensor location (Ts). Allow the

thermometer to stabilize before taking the

reading.

b. Disconnect the sensor from the control.

Using an ohmmeter, measure the resistance

across the two sensor leads. Consult the

Temperature vs. Resistance Chart (Figure

8) to verify sensor conformity.

c. Replace the sensor if its actual performance

deviates substantially from that represented

on the chart.

Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 9

260

240

220

200

180

160

140

120

100

-20

-40

121

110

98.8

87.7

76.6

65.5

54.4

43.3

32.2

21.1

-1.1

-12.2

-23.3

-34.4

600 800

1000 1200 1400 1600 1800 2000

Temperature

Resistance in Ohms

°F °

Figure 8: Temperature vs. Resistance Chart

for the SET189A Series Sensor

Note: The sensor reading indicated by the D350

may differ somewhat from thermometer

readings due to sensor tolerances, time

constants, thermometer accuracy, and other

factors.

3. Check the S350P for proper operation.

Note: Steps 1 and 2 must be performed first.

a. Reconnect the sensor to the A350 and

re-apply power.

b. Turn the A350’s setpoint to minimum.

c. On the S350P, turn the throttling range and

the minimum output to the minimum position

by turning both potentiometers

counterclockwise. Switch the integration off

and select the RA mode.

d. Adjust the minimum output to the maximum

position by turning the potentiometer

clockwise. As the potentiometer is turned

clockwise, the LEDs in the bar graph should

turn on from left to right until the fifth or

sixth bar is on. If they do not, replace the

S350P.

e. Adjust the minimum output to zero again

and select the DA mode. The “V” output

voltage should be greater than or equal to

10 VDC, the “I” current output should be

greater than or equal to 20 mA, and the

rightmost LED should be on. If not, replace

the S350P.

f. Slowly increase the setpoint on the A350.

The LEDs should turn off from the right side

to the left side of the bar graph, until all are

off (indicating that the A350 setpoint dial has

reached a value equal to the sensor

temperature minus the S350P’s offset). If

they do not, then replace the S350P.

Note: Although unlikely, it is possible that a defect

in one S350 could cause defective

symptoms in all modules. Plug each stage

module into the A350 and individually check

its performance as outlined in Steps 3a to

3f.

Do not make field repairs or perform calibration.

SET189A Temperature Sensors and replacement

controls are available through local Johnson

Controls representatives.

Repairs

Do not make field repairs or perform calibration.

SET189A Temperture Sensors and replacement

controls are available through Johnson Controls

representatives.

Ordering Information

Table 3: Ordering information

Product Code Number Description

S350PQ-1C Electronic Proportional Plus

Integral Temperature Stage

Module

10 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin

Specifications

Product S350P Proportional Plus Integral Temperature Stage Module

Input Voltage 5 VDC Reference Provided by the A350; 24V Power Supply

Ambient Temperatures Operating: -30 to 150°F (-34 to 66°C)

Shipping: -40 to 185°F (-40 to 85°C)

Humidity 0 to 95% RH Non-condensing; Maximum Dew Point: 85°F (29°C)

Analog Outputs 0 to 10 VDC (550 ohm Load Minimum) and 0 to 20 mA (600 ohm Load Maximum)

Minimum Output Adjustable from 0 to 60% of the Output

Output Indication A ten segment LED bar graph indicates percentage of output.

Mode of Operation Direct or reverse action is jumper selectable.

Offset Range 0 to 30F° (0 to 17C°)

Throttling Range 2 to 30F° (1 to 17C°)

Integration Constant Four Selectable Rates: Fast, Medium, Slow, and Off

Material Case, Cover: NEMA 1 High-impact Thermoplastic

Agency Listing UL Guide No. XAPX and cUL Guide No. XAPX7, File E27734

The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications,

consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Building Efficiency

507 E. Michigan Street, Milwaukee, WI 53202

® Johnson Controls and PENN are registered trademarks of Johnson Controls, Inc. in the

United States of America and/or other countries. All other trademarks used herein are the property

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