Spirax Sarco SP7-21 User manual

IM-P706-06 CTLS Issue 2 1
SP7-20, SP7-21 and SP7-22 Smart Positioner
© Copyright 2022
3440754/2
SP7-20, SP7-21 and SP7-22
Smart Positioner
Quick start guide
IM-P706-06
CTLS Issue 2
1. Safety information
2. Installation
3. Approvals
4. Declaration of conformity
Throughout the document SP7-2* is written
where the information is relevant to all
versions; the SP7-20, SP7-21 and SP7-22.
Where the information is specific it will be
referenced as the version appropriate.

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SP7-20, SP7-21 and SP7-22 Smart Positioner
Safe operation of these products can only be guaranteed if they are properly installed,
commissioned, used and maintained by qualified personnel (see SP7-20, SP7-21 and SP7-22
Installation manual IM-P706-03) in compliance with the operating instructions. General installation
and safety instructions for pipeline and plant construction, as well as the proper use of tools
and safety equipment must also be complied with.
Explosion Proof Warning
Please ensure the unit is being used and installed in conformity with local, regional, and national
explosion proof regulations.
-Refer to “8. Approvals”
-Explosion proof type of cables and gaskets should be used, when explosive gases are present
at the installation site.
-Power should be turned off completely when opening the product’s cover. When opening the
cover, ensure that there is no power remaining in any electrical parts nearby.
-Flameproof enclosure type positioner has 2 ports for power connection. Explosion proof type
wires and packing should be used. A blanking plug is required for any port that is not being used.
-For external ground terminal, ring terminal with surface area of more than 5.5 mm2 should
be used.
-There is risk of explosion due to static electricity charge. Static electricity charge may develop
when cleaning the product with a dry cloth. It is imperative to avoid static electricity charge
in the hazardous environment. A damp cloth must be used, when cleaning the surface of the
product.
-To meet explosion-proof marking information and ingress protection of IP66, use certified
Ex-cable glands and Ex-plugs.
-The cable entry must be equipped with a cable entry device, which must be an Ex cable
entry device approved by the explosion-proof inspection agency (For NEPSI - according to
the requirements of GB3836.1-2010 and GB3836.2-2010) and meet the requirements of the
product explosion-proof mark, and the installation of the cable entry device Use must follow
its instructions.
-The positioner is designed for use at an ambient temperature range of -40 °C up to 85 °C at
maximum.
-If the positioner is used at an ambient temperature above 60 °C or below -20 °C, cable glands and
cables approved for a service temperature corresponding to the maximum ambient temperature
increased by 10 K or corresponding to the minimum ambient temperature shall be used.
-The dimensions of the flameproof joints are in parts other than the relevant minimum or
maximum values of IEC 60079-1:2014. For information on the dimensions of the flameproof
joints contact the manufacturer.
-Fasteners with a minimum property class of 10.12, A2-70 or A2-80 must be used for the closing
of the flameproof enclosure.
1. Safety information

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SP7-20, SP7-21 and SP7-22 Smart Positioner
2. Installation
Fig. 1
Operating range for linear actuators:
The operating range for linear actuators is ±45 ° symmetrically to the longitudinal axis. The usable span
within the operating range is at least 25 ° (recommended figure 40 °). The usable span does not necessarily
need to run symmetrically to the longitudinal axis.
Operating range of rotary actuators:
The usable span is 90 °, which must be entirely within the measuring range, but does not necessarily need
to run symmetrically to the longitudinal axis.
Note: During installation make sure that the actuator travel or rotation angle for position feedback is
implemented correctly.
(1) Measuring range
(2) Operating range
Operators must wear ear protection when commissioning the positioner
2.1 Measuring and operating ranges of the positioner

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SP7-20, SP7-21 and SP7-22 Smart Positioner
1. Attach the lever (6) to the feedback shaft (5)
of the positioner (can only be mounted in one
position due to the cut shape of the feedback
shaft).
2. Using the arrow marks (4), check whether the
lever moves within the operating range (between
the arrows).
3. Hand-tighten the screw (7) on the lever.
4. Hold the prepared positioner (with the mount
bracket 1 still loose) on the actuator so that the
follower pin for the lever enters the follower guide
to determine which tap holes on the positioner
must be used for the mount bracket.
5. Secure the mount bracket 1 with screws 2 and
washers 3 using the relevant tap holes on the
positioner housing.
2.2 Attaching a follower guide to the actuator
1. Tighten the screws so that they are hand tight
2. Attach the follower guide (1) and clamp plates
(2) with screws (4) and spring washers (3) to
the actuator stem.
2.3 Mounting lever and bracket on the positioner
Note
Positioner mounting threaded holes and bracket holes, depend on the actuator type used. Select to suit, to
ensure the follower pin has free movement in the follower guide over entire valve travel.
Tighten the screws as evenly as possible to ensure subsequent linearity. Align the mount bracket in the
oblong hole to ensure that the operating range is symmetrical Set the valve mid stroke and align the lever
horizontal (item 6 Fig. 3) then tighten mounting bolt (item 4 Fig. 4) (lever moves between the arrow marks
Item 4 Fig. 6).
Fig. 2
Fig. 3

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SP7-20, SP7-21 and SP7-22 Smart Positioner
2.4 Mounting on a yoke
1. Attach the mount bracket (2) with screw (4) and
washer (3) to the yoke (1)
2.5 Mounting on a column yoke
1. Hold the mount bracket (3) in the proper position on the column (2).
2. Insert the U-bolts (1) from the inside of the column (2) through the holes of the mount bracket.
3. Add the washers (4) and nuts (5).
4. Tighten the nuts so that they are hand-tight.
Notes:
- Adjust the height of the positioner on the yoke or column until the lever is horizontal (based on a visual
check) at half stroke of the valve.
- Items 1, 4 and 5 to be ordered separately
Fig. 4
Fig. 5

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SP7-20, SP7-21 and SP7-22 Smart Positioner
(1) Increase linkage
(2) Decrease linkage
2.6 Positioner linkage
The scale on the lever indicates the link points
for the various stroke ranges of the valve.
Move the bolt with the follower pin in the oblong
hole of the lever to adjust the stroke range of
the valve to the working range for the position
sensor.
Moving the link point inwards increases the
rotation angle of the sensor. Moving the link
point outwards reduces the rotation angle of
the sensor.
Adjust the actuator stroke to make use of
as large an angle of rotation as possible
(symmetrical around the center position) on the
position sensor.
Recommended range for linear actuators: −28 to 28 °
Minimum angle: 25 °
Note: After mounting, check whether the positioner is operating within the measuring range.
2.7 Position of the actuator bolt
The actuator bolt for moving the potentiometer lever can be mounted permanently on the lever itself or on
the valve stem. Depending on the mounting method, when the valve moves the actuator bolt performs either
a circular or a linear movement with reference to the center of rotation of the potentiometer lever. Select
the chosen bolt position in the HMI menu in order to ensure optimum linearisation. The default setting is
actuator bolt on lever
2.8 Actuator bolts on the lever (Rear view)
1Potentiometer lever
2Actuator bolts
3Valve stem
4Valve yoke
5Positioner
Fig. 7
Fig. 6

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SP7-20, SP7-21 and SP7-22 Smart Positioner
1Potentiometer lever
2Actuator bolts
3Valve stem
4Valve yoke
5Positioner
Fig. 8
2.9 Actuator bolts on the Valve (Rear view)
M11032
1 2 3
5 4
2.10 Mounting the adapter on the positioner
1. Determine the mounting position (parallel to
actuator or at 90 ° angle)
2. Calculate the rotational direction of the
actuator (right or left).
3. Move the part-turn actuator into the home
position.
4. Pre-adjust feedback shaft.
To make sure that the positioner runs within
the operating range (refer to 'Measuring and
operating ranges of the positioner' on page
3), the mounting position as well as the basic
position and rotation direction of the actuator
must be considered when determining the
adapter position on axis (1). For this purpose,
the feedback shaft can be adjusted manually
so that the adapter (3) can be attached in the
correct position.
5. Place the adapter in the proper position on the
feedback shaft and fasten with threaded pins
(2). One of the threaded pins must be locked
in place on the flat side of the feedback shaft. Fig. 9

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SP7-20, SP7-21 and SP7-22 Smart Positioner
2.11 Screwing the attachment bracket onto the positioner
Fig. 11
Fig. 10
(1) Attachment bracket
2.12 Screwing the positioner onto the actuator

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SP7-20, SP7-21 and SP7-22 Smart Positioner
2.13 Electrical connections
Positioner SP7-20 Electrical Connection
M10981
+11 -12 +81
-82 +83 -84
DI DOAI
+51 -52
SW2
+41 -42
SW1
+31 -32
AO
B
A
+51 -52 +41 -42
41 42 43 51 52 53
CLimit 1 Limit 2
Limit 1 Limit 2
A Basic device
Connections for inputs and
outputs
Terminal Function/comments
+11/−12 Analog input
+81/−82 Binary input DI
+83/−84 Binary output DO2
2.14 Positioner SP7-21/22 Electrical Connection
A Basic device
Terminal Function/comments
+11/−12 Fieldbus, bus feed
Fig. 13
2.15 Electrical data for inputs and outputs
Note : When using the device in potentially explosive atmospheres, note the additional connection data in
Use in potentially explosive atmospheres in IM-P706-03.
Fig. 12

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SP7-20, SP7-21 and SP7-22 Smart Positioner
2.16 Analog input
Only for devices with HART Communication.
Set point signal analog (two-wire technology)
Terminals +11/−12
Nominal operating range 4 to 20 mA
Split range configuration between 20 to 100 % of the nominal operating range can be parameterized
Maximum 50 mA
Minimum 3.6 mA
Starting at 3.8 mA
Load voltage 9.7 V at 20 mA
Impedance at 20 mA 485 Ω
2.17 Fieldbus input
Only for devices with PROFIBUS PA or FOUNDATION Fieldbus Communication.
Bus Connection PROFIBUS PA FOUNDATION fieldbus
Terminals +11/−12 +11/−12
Supply voltage (Power feed from the Fieldbus) 9 to 32 Vdc 9 to 32 Vdc
Max. permissible voltage 35 Vdc 35 Vdc
Input Current 10.5 mA 11.5 mA
Current in the event of an error 15 mA (10.5 mA + 4.5 mA) 15 mA (11.5 mA + 3.5 mA)
2.18 Binary Data
Only for devices with HART Communication. Output configurable as alarm output by software.
Binary output DO
Terminals +83/−84
Supply voltage (Control circuit in accordance with DIN 19234/NAMUR) 5 to 11 Vdc
Output ‘logical 0’ > 0.35 mA to < 1.2 mA
Output ‘logical 1’ > 2.1 mA
Direction of action Configurable ‘logical 0’ or ‘logical 1’
Binary input DI
Terminals +81/−82
Supply voltage 24 Vdc (12 to 30 Vdc)
Input ‘logical 0’ 0 to 5 Vdc
Input ‘logical 1’ 11 to 30 Vdc
Input Current Maximum 4 mA