Siemens sqm50 Installation Instructions Manual

Installation Instructions

Document No. 129-399

January 18, 2008

SQM5… Reversing Actuator with Line Voltage Input Signal

Product Description

Reversing actuator used to position flow control
valves, butterfly valves, dampers, or any application
requiring rotary motion with line voltage input signal
for Position Proportioning or Floating Control.

Product Numbers

SQM5x.xxxRxAx for line voltage input signals
Actuator Torque:
SQM50.2… 90 in/lb
SQM50.3… 90 in/lb
SQM50.4… 140 in/lb
SQM53.4… 200 in/lb
SQM56.5… 310 in/lb
SQM56.6… 400 in/lb
SQM… motors allow torque on either end of the

AGA58.3 and AGA58.4 shafts.
NOTE: For detailed information, see Technical

Instructions 155-517P25.

Max Shaft Torque:
AGA58.1 200 in/lb
AGA58.3 220 in/lb
AGA58.4 270 in/lb
AGA58.7 400 in/lb

Caution Notation

CAUTION:

Equipment damage may
occur if procedures are not
followed as specified.

Installation

Cover Removal

Use a Phillips screwdriver to loosen the two screws
on the actuator cover corners. See Figure 1.

EA0564R1

Figure 1. Figure 2.

EA0568R1

Rotational Direction Verification

Actuator model numbers that end with “R” are
factory configured for clockwise (cw), minimum to
maximum rotation when facing the gear end of the
actuator, or counterclockwise (ccw) rotation when
facing the other end of the actuator. The gear end of
the actuator is the side opposite of the visual
position indicator

Actuator Mounting

SQM5… actuators can be mounted in any
orientation. Optional base mounting brackets are
available.

SQM5… actuators can also be face-mounted using
self-tapping screws in combination with the various
holes on the face of the actuator gear end.

Switch Adjustment

SQM5…actuators are factory-wired with Switch I
(maximum), Switch II (fully closed/economy position)
and Switch III (minimum/low-fire). The individual
switch cams I, II, and III are factory set to 90°, 0°
and 10°, respectively. See Figures 3 and 4.

Lift the screws and raise the cover. See Figure 2.

Item Number 129-399, Rev. BA Page 1 of 4

Document No. 129-399
Installation Instructions
January 18, 2008

EA0561R3

ACTUATOR

POSITION SCALE

ACTUATOR POSITION
INDICATING POINTER

CAM DRUM

RELEASE BUTTON

GEAR END

SWITCH CAM I

SET AT MAXIMUM

SWITCH CAM II

SET AT ZERO ("ECONOMY")

50

10

0

30

10
30

10

0

50

0

70

SINGLE SWITCH

CAM POINTER

DOUBLE SWITCH CAM POINTER

SWITCH CAM III

SET AT MINIMUM

Figure 3. Component Identification on the Cam Drum Side of the SQM5…Actuator.

NOTE: The single switch cam pointers are used

together with the black scales when
configured for ccw operation.

The double switch cam pointers are used

together with the red scales when
configured for cw operation.

The individual switch cams can be

adjusted by hand or with the use of the tool
attached to the outside of the hinged
switch terminal protection lid.

SQM5x.xxxRxA actuators without

potentiometer must be adjusted only
between 0° and 160°.

If a potentiometer is installed, the

adjustable range of the switches depends
on the range of the potentiometer.

SQM5x.xxxRxA3 actuators have a 90°

potentiometer and the switches must be
adjusted between 0° and 90°.

SQM5x.xxxRxA4 actuators have a 135°

potentiometer and the switches must be
adjusted between 0° and 135°.

ACTUATOR POSITION

CAM DRUM

ASZ... (1000 Ohm)

FEEDBACK POTENTIOMETER

50

30

10

0

0

50

30

10

0

0

DIAL POINTER

INDICATING DIAL

Shaft Adjustment

The actuator shaft can be disengaged by pressing
the silver shaft release button. The button is located
above the grounding screw, under the hinged
terminal protection cover, and to the right of the
auto/manual switch. After pressing the shaft release
button in and slightly upward, the shaft can be
manually rotated. After the shaft has been manually
aligned to the closed position, re-engage the shaft
by pushing the shaft release button downwards.

Cam Drum Adjustment

Once the shaft has been set, the cam drum must be
manually aligned by pressing and holding the black
cam drum release button (see Figure 3). Rotate the
cam drum until the “0” mark on the actuator position
scale (left scale on the cam drum) is aligned with the
gray actuator position indicating pointer.

Position Indicating Dial Adjustment

The actual position of the SQM5… actuator is
indicated by the gray actuator position indicating
pointer (see
by the indicating dial through the housing’s window.
Ensure that the actuator position indicating dial is
aligned with the actuator position scale. If
necessary, rotate the dial in the clockwise direction.

Figure 3). The position is also displayed

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