SRP981 - Pneumatic positioner SCHNEIDER - Free user manual and instructions

Product Type	Pneumatic Positioner
Brand	Schneider (Foxboro)
Model	SRP981
Pneumatic Supply	1.4 to 6 bar, clean de-oiled air without dust or water (IEC 648)
Pneumatic Input Signal	Yes (w)
Pneumatic Connections	G 1/8 for supply (7), output I y1 (8), output II y2 (6) for double acting
Power Supply (transmitter option)	11-48 V DC, 2-wire system
Linear Stroke Range	From 8 to 200 mm depending on measuring spring
Compatible Actuator Types	Linear or rotary, single or double acting
Adjustments	Zero point, stroke, damping
Damping	Throttling screw reducing air flow by a factor of 2.5
Optional Position Transmitter	Analog output 4-20 mA
Available Measuring Springs	5 references: yellow (8-34 mm), green (17-68 mm), none (28-105 mm), gray (40-158 mm), blue (55-200 mm)
Mounting	On linear or rotary actuators with mounting kit
Standards	IEC 648 for air quality
Safety	Follow recommendations EX EVE0001, PSS EVE0101, MI EVE0101
Intended Use	Positioning of pneumatic valves in industrial processes

Frequently Asked Questions - SRP981 SCHNEIDER

How to mount the SRP981 positioner on a linear actuator?

Ensure the actuator is in the safety position. Mount the positioner by selecting the side according to the action direction (commutation plate 13 in N or U position). Attach the coupling lever horizontally at 50% stroke. The housing vent must face downward.

What air pressure is required for the SRP981?

The supply must be 1.4 to 6 bar, with clean, de-oiled air, free of dust and water, conforming to IEC 648 standard.

How to adjust the zero point and stroke of the positioner?

Apply the start-of-stroke signal, turn the zero screw 41 until movement begins. Apply the end-of-stroke signal, turn the stroke screw 42 to reach the final position. Repeat 2 to 3 times.

How to adjust the damping of the SRP981?

Use the damping screw 44 (and 45 for double acting) to reduce air flow. In normal position, the screw is flush with the housing; when fully turned, the flow is reduced by a factor of 2.5.

How to install the 4-20 mA position transmitter?

Mount the transmitter according to manual MI EVE0101. With 50% stroke, the lever must be horizontal. Connect the 11-48 V DC power supply. Both LEDs light up.

How to calibrate the 4-20 mA position transmitter?

For 4 mA: place the actuator at 0% and press S1 >2s. For 20 mA: place at 100% and press S2 >2s. To fine-tune, press both buttons simultaneously >2s, then use S1 to decrease, S2 to increase.

What to do if the transmitter LEDs flash rapidly?

This indicates an error (potentiometer disconnected or current >24 mA). Check the potentiometer connection and that it is within its working range. If the LEDs are off, check the supply voltage and polarity.

What measuring springs are available for the SRP981?

Five springs: yellow (8-34 mm), green (17-68 mm, factory installed), no color (28-105 mm), gray (40-158 mm), blue (55-200 mm). Choose according to stroke and input signal.

Can the SRP981 be used with rotary actuators?

Yes, with the appropriate mounting kit. Mount the cam according to the rotation direction, attach the coupling lever, and adjust the roller follower against the cam.

What are the safety instructions for the SRP981?

Follow documents EX EVE0001 (safety), PSS EVE0101 and MI EVE0101. The maximum actuator pressure must not be exceeded. Use clean air according to IEC 648.

USER MANUAL SRP981 SCHNEIDER

SRP981 Pneumatic Positioner

Pneumatischer

Stellungsregler

Internal view of a mechanical device with visible components and a metal strap, no text or symbols present.

Quick Guide .....(English)

These instructions are to be used as a guide for quick start-up. For more detailed information please refer to the standard documents "Master Instructions" and "Product Specification Sheet". These can be found on our Website.

1 MOUNTING TO LINEAR ACTUATORS

Single-acting diaphragm actuators

Check whether the actuator is in the safety position required by the process. (Does the actuator open or close with spring force?) The mounting side is selected from the table below in accordance with the direction of action and the required direction of movement of the spindle for an increasing input signal.

Actuator closes with spring force	Changeover plate setting	Actuator opens with spring force	Changeover plate setting

The arrow indicates the direction of movement of the spindle at increasing input signal.

The direction of action of the input signal can be set on the changeover plate 13 :

N = Normal direction of action (increasing input signal produces increasing control pressure to the actuator)

U = Reverse direction of action (increasing input signal produces decreasing control pressure to the actuator)

Double-acting diaphragm actuators

For double-acting positioners the changeover plate 13 always stays in the "N" setting. The assignment of the input signal to the direction of movement of the actuator spindle is determined by the selection of the mounting side of the positioner and the piping of the positioner outputs to the actuator:

	Changeover plate setting		Changeover plate setting

Mechanical assembly diagram showing a blue box labeled M and a blue spring with labeled parts 12 (no text or symbols beyond labels)

Ensure that the feedback lever 11 is horizontal at 50 % stroke.

Fasten housing cover in such a way that air vent of attached device faces downwards (see Mark 'M').

11 Life Is On

Foxboro™

by Schneider Electric

2 MOUNTING TO ROTARY ACTUATORS

a) Remove the transparent cover plate from the housing of the attachment kit.
b) Mount the housing of the attachment kit on rotary actuator or armature; use mounting hardware supplied by the actuator manufacturer if necessary.
c) Move actuator into the desired starting position (rotation angle = 0°).
d) Mount cam 24 in accordance with the direction of rotation of the actuator.

The linear cam is fastened to the actuator drive shaft in such a manner that the distance x between the inside of the housing and the came amounts 2 mm, whereas in case of equal percentage cam the dimension x is approx. 17.5 mm.

In case of inverse equal percentage cam the dimension x is approx. 18 mm.

When employing equal percentage and the inverse equal percentage cams, the range spring (yellow) EW420493013 must be installed in the positioner.

e) Fasten feedback lever 30 for the rotary actuator onto shaft 15 of positioner.
f) Mount positioner on housing of attachment kit. Attach spring 31 to feedback lever 30 and cam follower 32 against cam.

Screw positioner to housing of attachment kit. With the linear cam and the inverse equal percentage cam check whether mark 33 points to the center of the cam follower 32; adjust if necessary.

With the equal percentage cam check whether the cam follower lies directly ahead of the start of the cam lobe; adjust if necessary.

g) Final mounting of feedback lever on shaft of positioner is performed at a stroke of 0 %, i.e. a rotation angle of 0°. First loosen 5 mm A/F Allen screw of feedback lever 30 through hole 34, then press stroke factor lever 17 against stop screw 18 (see page 5) and tighten Allen screw firmly.

Note!

If actuator moves to an end position, the mounting position of cam does not coincide with the direction of rotation of the actuator. In this case install the cam 24 in the reverse position.

Exterior view of a blue industrial control box with red LED indicator (no visible text or symbols)

linear

inverse equal percentage

equal percentage

A = Mounting position for actuator rotation ↓
B = Mounting position for actuator rotation ↓

31 30

Close-up of a metallic tool interacting with a dark, smooth object on an orange surface (no text or symbols visible)

3 PNEUMATIC CONNECTIONS

Air supply (s): 1,4 to 6 bar (but not more than the max. pressure of actuator), free of oil, dust and water!

4 Pneumatic input signal (w)
6 Internal thread G 1/8 for output II (y2) (only on double-acting positioners)
7 Internal thread G 1/8 for supply air
8 Internal thread G 1/8 for output I (y1)

4 ELECTRICAL CONNECTIONS OF OPTION

Simple line drawing of a rectangular object with four circular indentations on its base (no text or symbols)

4
8
7

6

Air supply according to ISO 8573-1

• Solid particle size and density class 2
• Oil rate class 3
  Pressure dew point 10 K below ambient temperature

The safety requirements of the document EX EVE0001 as well as the requirements of the PSS EVE0101 and MI EVE0101 for the SRP981 must be observed

4.1 Option "Limit switch"

The limit switches is an accessory either installed in the factory or retrofit.

This unit can consist of either inductive slot type sensors or micro switches.

4.2 Option "Position Transmitter 4-20 mA"

The electrical position transmitter is an accessory either installed in the factory or retrofit. It converts the stroke or rotary movement of an actuator into an electrical standard signal 4-20 mA.

5 SETTINGS AND START UP

5.1 Setting of zero point and stroke on the positioner

(see page 5 for the reference of the number)

Before starting with the set-up push the flapper lever 40 several times alternately to the left and right in order to align the flappers correctly.

a) Set the minimum value of the input signal w (start of stroke).
b) Turn zero screw 41 until actuator just begins to move from its end position.
c) Set maximum value of the input signal w (end of stroke).

d) Turn the stroke factor screw 42 until actuator precisely reaches its end position:

Right turn: decrease of travel

Left turn: increase of travel

Repeat the operations (a to d) 2 or 3 times in order to insure an accurate positioning.

Note:

Changes of the gain will influence the settings of zero and span.

If the stroke cannot be adjusted with the installed spring, a suitable spring can be determined with the table on page 5.

5.2 Setting the damping

The air output capacity of the positioner can be reduced by means of the damping throttle 44. Double-acting positioners are equipped with a damping throttle 44 for correcting the variable y1 and a damping throttle 45 for correcting the variable y2. In its normal setting the damping throttle is approximately flush with the amplifier housing.

The air output capacity is reduced by a factor of approximately 2.5 when the damping throttle is turned completely.

5.3 Setting and Start Up of position transmitter 4-20 mA

Attachment and start-up of the unit to the actuator must be performed according MI EVE0101 A. At 50% stroke, the control lever must be horizontal.

The electronic connection of the position transmitter must be assured. Both LEDs are then light up.

Adjusting the start of the measuring range (4 mA)

a) Move the actuator to the starting position.
b) Press push button S1 „Config Output 4 mA“ longer than 2 seconds. During this time LED 1 lights up. After 2 seconds both LEDs are light up again, the value for 4mA is stored.

Adjusting the end of the measuring range (20 mA)

a) Move the actuator to the end position.
b) Press push button S2 „Config Output 20 mA“ longer than 2 seconds. During this time LED 2 lights up. After 2 seconds both LEDs are light up again, the value for 20 mA is stored.

Random adjustment of the current values at the end points

a) Move the actuator to the end position, where you want to adjust the current.
b) Press both buttons simultaneously for about 2 seconds. Then both LEDs are alternating flashing in a slow frequency.
c) With push button S1 „Config Output 4 mA“ the output current value can be decreased and with push button S2 „Config Output 20 mA“ the output current value can be increased. Pressing the buttons for a short moment results in a small change and pressing the button for a longer time results in a fast mode for a bigger change. The value of the current can be freely decreased between about 3.3 and increased up to 22.5 mA.
d) Without any additional manipulations of the push buttons the new value is automatically saved. After a few seconds, the device returns into the normal operating mode, indicated by both LEDs that are then light up again.

Trouble shooting of the position transmitter

The components of the position transmitter are under constant surveillance by the installed micro controller. Errors are detected and indicated when both LEDs are off or both LEDs are parallel flashing at a fast frequency.

In the event of a fatal error, e.g. potentiometer not connected, an output current of more than 24 mA will be shown in addition to the error indication given by the LEDs (fast flashing).

In this case check the following:

a) if the potentiometer is correctly connected to the electronic board.
b) if the potentiometer is within its working span.

When both LEDs are off, the supply voltage should be checked (minimum tension, polarity).

5.4 Spring range

Five different springs for the travel ranges are available for matching to the stroke and input signal range. In the following table the stroke range is given for a normal application (4-20 mA and with our standard feedback lever).

Spring range Stroke range		in mm	Remarks
Ident N° Colour
EW420493013 Yellow 8 - 34
EW420494019 green 17 - 68 Built-in
EW502558017 - without - 28 - 105
EW420496011 gray 40 - 158
EW420495014 blue 55 - 200

5.5 Functional designation

Single acting positioner SRP981

Double acting positioner SRP981

Invensys Systems, Inc. 38 Neponset Street Foxboro, MA 02035 United States of America

schneider-electric.com

Global Customer Support Toll free: 1-866-746-6477 Global: 1-508-549-2424 Website: http://support.ips.invensys.com

Copyright 2010-2016 Invensys Systems, Inc. All rights reserved. Invensys, Foxboro, and I/A Series are trademarks of Invensys Limited, its subsidiaries, and affiliates. All other trademarks are the property of their respective owners.

Close-up of a mechanical device with internal spring and housing (no visible text or symbols)

M

by Schneider Electric

2 ANBAU AN SCHWENKANTRIEBE

Exterior view of a light blue industrial control box with metallic components and red base (no visible text or symbols)

2-wire technique 3-wire technique micro switch

Interior view of an industrial control box with visible wiring, switches, and components (no text or symbols)

Single acting positioner SRP981

Double acting positioner SRP981

SRP981 POSITIONNEUR PNEUMATIQUE

Mechanical assembly diagram showing a blue mechanical device with internal components and labeled parts M and 11 (no text or symbols beyond labels)

12

by Schneider Electric

2 MONTAGE SUR SERVOMOTEURS ROTATIFS

Exterior view of a light blue industrial control box with metallic components and a red warning light (no visible text or symbols)

3 RACCORDEMENTS PNEUMATIQUES

Simple line drawing of a rectangular device with four circular buttons at the base (no text or symbols)

4
8
7
6

Air selon ISO 8573-1

Interior view of an industrial control panel with visible components and wiring (no text or symbols)

by Schneider Electric

Invensys Systems, Inc. 38 Neponset Street Foxboro, MA 02035 United States of America

schneider-electric.com

Global Customer Support Toll free: 1-866-746-6477 Global: 1-508-549-2424 Website: http://support.ips.invensys.com

Copyright 2010-2016 Invensys Systems, Inc. All rights reserved. Invensys, Foxboro, and I/A Series are trademarks of Invensys Limited, its subsidiaries, and affiliates. All other trademarks are the property of their respective owners.

DOKT 556 806 014 FD-QG-PO-007-FR

0316

SRP981 POSIZIONATORE PNEUMATICO

by Schneider Electric

2 MONTAGGIO SU ATTUATORI ROTATIVI

Exterior view of a blue industrial control box with metallic components and orange base (no visible text or symbols)

Lineare

di

Note!

Simple line drawing of a rectangular object with four circular indentations on its side (no text or symbols)

4 8 7 6

Interior view of an industrial control box with visible circuitry and components (no text or symbols)

Single acting positioner SRP981

Double acting positioner SRP981