Siemens SQM45 Series User manual

CC1N7814en
31.10.2002
Siemens Building Technologies
HVAC Products
ISO 9001
7814
Actuators SQM45...
SQM48...
for air dampers and control valves of oil and gas burners
Electromotoric actuators
·Torques: – SQM45... up to 3 Nm
– SQM48... up to 20 Nm
– SQM48.6... up to 35 Nm
·Running times: 1) – SQM45... 10 ... 120 s
– SQM48... 30 ... 120 s
– SQM48.6... 60 ... 120 s
1) Depending on the basic unit (LMV...)
·Versions: – Choice of drive shafts (refer to «Type summary»)
The SQM45... / SQM48... and this Data Sheet are intended for use by OEMs which
integrate the actuators in their products!
Use
The actuators of the SQM45... / SQM48... range are used to drive gas dampers, air
dampers, oil control valves and other ancillary equipment.
When used in connection with burner controls or electronic fuel / air ratio control, the
associated controlling elements are controlled depending on burner output.

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Warning notes
To avoid injury to persons, damage to property or the environment, the following
warning notes should be observed!
Do not open, interfere with or modify the actuators!
·Ensure protection against electric shock hazard by providing adequate protection
for the connection terminals
·Check to ensure that wiring is in an orderly state and that the wires are firmly con-
nected
Mounting notes
·Ensure that the relevant national safety regulations are complied with
·The connection between actuator drive shaft and controlling element must be rigid
with no mechanical play
Possible connection with drive shaft or hub:
·Groove with Woodruff key
·Drive shaft with flat edge and matching counterpiece
To avoid inadmissible loads on bearings caused by rigid hubs, it is recommended to
use compensating clutches with no mechanical play (e.g. metal bellows clutches).
Only the specified cable may be used (refer to Basic Documentation P7550). The ca-
ble’s shielding must be connected to the printed circuit board using the tab provided.
Ensure that the actuator’s housing is connected to functional earth (FE) of the system.
If necessary, remove isolating layers of paint from the fixing points on the burner’s
casing or run separate earth wires.
For detailed information, refer to «Installation Inctructions for the LMV5x system»
J7550.1.
CAN bus
AGG5.6...
SQM4...
FE
Basicunit
LMV5...
7814z03e/0502
The working range is given on the type field and must be observed when mounting the
actuator. To ensure the actuator is accurately located on the burner, a positioning pin of
6 mm diameter must be fitted on the mounting surface.
Positive connection
Cable and cable
shielding
Working range of
actuator

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To ensure degree of protection IP 54, suitable Pg glands must be fitted in the actua-
tor’s Pg11 openings.
The Pg glands used must feature cable strain relief.
To ensure degree of protection IP 54 during the actuator’s entire service life, the bear-
ing of the drive shaft must be located such that it will not be directly exposed to water or
dust.
SQM4...
Mounting plate SQM4...
Secure coupling piece to drive shaft
such that intermediate plastic
piece has an axial play of about
0.2 to 0.5 mm
Mounting plate VKF41...
Spacer
VKF41...
7814z02e/0502
ASK33.4
Installation notes
·Installation work must be carried out by qualified staff
·Always run the high-voltage ignition cables separate from the unit and other cables
while observing the greatest possible distance
·To ensure protection against electric shock hazard, make certain that the AC 230 V
section of the SQM4... is strictly segregated from the functional low-voltage section
·The holding torque is reduced when the actuator’s power supply is switched off
The housing cover may only be removed for short periods of time for wiring or when
making the addressing. It must be made certain that dust or dirt will not get inside the
actuator while such work is carried out.
The actuator contains a printed circuit board with ESD-sensitive components.
The top side of the board carries a cover which affords protection against direct con-
tact. This protective cover may not be removed! The underside side of the board may
not be touched.
Addressing (assignment of functions) defines whether the SQM4... shall operate as a
·fuel actuator
·air damper actuator, or
·auxiliary actuator,
and is made with the display and operating unit AZL... and the addressing button on the
actuator, which is located under the housing cover (refer to Basic Documentation
P7550).
The correct assignment of actuator functions can be checked with the help of flashing
LEDs.
For the maximum permissible cable length, refer to the Basic Documentation.
Cabling must be strictly serial (no branching permitted!).
Commissioning notes
·Commissioning work must be carried out by qualified staff
IP 54
Mounting example
Housing cover
ESD
Addressing
Cable length
Topology

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Standards
Conformity to EEC directives
- Electromagnetic compatibility EMC (immunity) 89 / 336 EEC
- Low-voltage directive 73 / 23 EEC
Service notes
·Maintenance work must be carried out by qualified staff
·Each time an actuator has been replaced, check to ensure that wiring is in an or-
derly state and that the wires are firmly connected
When replacing an actuator, the following points must be checked and, if necessary,
corrected:
·Addressing (assignment of functions)
·Bus termination
·Adjustment of the curvepoints of electronic fuel / air ratio control (e.g. with the
LMV51...)
Disposal notes
The actuator contains electrical and electronic components and may not be disposed of
together with household waste.
Local and currently valid legislation must be observed.
Mechanical design
The housing is made of die-cast aluminium.
The cover is made of impact-proof and heat-resistant plastic.
Color of cover: Black
Stepper motor
In connection with the basic unit (e.g. LMV51...): Via the display and operating unit
AZL5X (refer to Basic Documentation P7550).
RAST3.5 terminals (supplied together with the AGG5.720 / AGG5.721).
SQM45...: Spur gears made of plastic with small backlash and permanent lubrication.
SQM48...: Spur gears made of steel with small backlash and permanent lubrication.
Made of black-finished steel, ready fitted to the front of the geartrain (SQM48... uses a
drive shaft made of hardened steel).
The front of the geartrain is used as the mounting surface. The actuator has 4 fixing
holes and 1 elongated hole for the positioning pin.
Alternatively, the actuator can be secured from the side of the controlling element with
3 self-tapping screws.
Replacement
Housing
Actuator
Adjustment of switching
points / position
indication
Electrical connections
Geartrain
Drive shaft
Mounting and fixing

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Type summary
Type reference Drive shaft
1)
no.
Running time
(min.)
for 90°
s
Nominal
torque
(max.)
Nm
Holding
torque 2)
(max.)
Nm
Radial
bearing
force (max.)
N
SQM45.291A9 110 3
3) 1.5 190
SQM45.295A9 510 3
3) 1.5 190
SQM48.497A9 7 30 20 4) 20 420
SQM48.697A9 7 60 35 4) 35 800
1) Refer to «Dimensions» 4) Under nominal conditions. Under extreme conditions
2) With operating voltage applied (above +50 °C ambient temperature), the torque is about
3) Under nominal conditions. Under extreme conditions
(below –15 °C ambient temperature), the available torque
is about 15 % lower
15 % lower
Ordering
When ordering, please give type references of actuator and accessories according to
«Type summary».
In addition to the actuator, the following item is to be ordered separately and is also
supplied as a separate item:
·Shielded cable
·Special terminals RAST3.5 as part of the AGG5.720 / AGG5.721 set
Accessories
Accessories must be ordered as separate items.
Adapter for gas valves VKF41...C ASK33.4
Connecting cables AGG5.6...
- Only the specified cables may be used!
- Refer to Basic Documentation P7550
Actuators SQM4...
Legend

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Technical data
Operating voltage AC 2 x 12 V via bus cable from the basic
unit or via a separate transformer
Safety class extra low-voltage with safe isolation from
mains voltage
Power consumption
-SQM45...
-SQM48...
9...15 VA
26...34 VA
On time 50 %, max. 3 min. continuously
Angular adjustment max. 90°
Mounting position optional
Degree of protection to EN 60 529, IP 54, provided adequate
cable entries are used
Cable entry SQM45... / SQM48...:
insertable threaded cable glands for
2 x Pg11
Electrical connections RAST3.5 terminals
(for details, refer to the basic unit)
Ferrules matching the dia. of the stranded wire
Direction of rotation can be selected on the basic unit
Torques and holding torques refer to «Type summary»
Reproducibility (typically in the show-room
condition)
±0.2° (when used with the basic unit
LMV51...)
Running times refer to «Type summary» (can be selected
on the basic unit)
Load changes with continuous heavy loads
- SQM45... / SQM48.497
- SQM48.697
typically 500,000
typically 300,000
Weight
-SQM45...
-SQM48...
approx. 1 kg
approx. 1.6 kg
Direction of rotation (when facing the shaft)
-Standard
-Reverse
counterclockwise
clockwise
Transport
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60 721-3-2
class 2K2
class 2M2
-20...+70 °C
< 95 % r.h.
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60 721-3-3
class 3K5
class 3M2
-20...+60 °C
< 95 % r.h.
Condensation, formation of ice and ingress of water are not permitted!
Actuator
Environment conditions

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Function
The SQM45... / SQM48... are of robust design and have a geartrain with only small
backlash.
Control and position feedback take place via a bus system (CAN).
The bus cable is also used for powering the actuators.
The actuators are driven by stepper motors and can be positioned with a resolution of
0.1°.
The characteristics and settings (running time, direction of rotation, limit positions) of
the SQM4... are determined by the controlling basic unit (e.g. LMV5...; for details, refer
to the Basic Documentation of the LMV...).
The running times of the associated controlling elements are varied by the basic unit
depending on the burner’s control phase (e.g. startup phase: short running time; opera-
tion: long running time).
Terminating resistor
At the end of the serial bus cabling, a terminating resistor must be fitted.
For that purpose, a jumper must be set to BUS TERMINATION on the last actuator of
the bus cable, which will activate the resistor.
On all the other actuators, that jumper must be set to the other position (deactivated).
Addressing button
12VAC1 12VAC2 CANH CANL GND
X1
7814z01e/1002
LED (function code)
Jumper
X2
Bus
termination
12VAC1
12VAC2 CANH
CANL GND
Assignment of terminals
The 2 terminal blocks (X1 and X2) are identical.

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Dimensions
Dimensions in mm
2.5
+0.05
+0.1
SQM45...
5
+0.1
N9
h9
0
0
6
1.9
0
+0.1
ø5.4
3
h8
1
0
P9
ø10
ø10
h8
ø16
ø10
ø14
5
7
D-shaft
Prepared for self-tapping
screws M5, 10 mm deep,
to DIN 7500
8.5
0
-0.05
1
ø18
7814m01e/1102
90
76
50
25.5
2 x Pg11
22
6
17
25
12
ø16
SQM45...
SQM48...
36
39
228
33
137 122
87
25 41
116
2
6
15
47
Groove for
Woodruff key
3x3.7 to DIN 6888
Groove
for parallel key A5x3x28
to DIN 6885 T3
1.5
SQM45... / SQM48...
ã2002 Siemens Building Technologies
Subject to change!