INSTALLATION INSTRUCTIONS
https://customer.honeywell.com/en-US/Pages/department.aspx?cat=HonECC%20Catalog&category=Commercial&catpath=1.1
3 Nm Series Spring Return
Direct Coupled Actuators
MS7103, MS7503, MS3103
MS7103, MS7503, MS3103 Spring Return Direct Coupled
Actuators (DCA) are used within heating, ventilating, and air-
conditioning (HVAC) systems. They can drive a variety of
quarter-turn, final control elements requiring spring return
fail-safe operation.
Applications include:
• Volume control dampers, mounted directly to the drive
shaft or remotely (with the use of accessory hardware).
• Quarter-turn rotary valves, such as ball valves mounted
directly to the drive shaft.
• Available with cable on all models
• Fast test mode
SPECIFICATIONS
Models:
See Table 1.
Device Weight:
1.7lbs (0.78 kg)
Ambient Operating Temperature:
-40° to 150°F (-40° to 65°C)
Shipping and Storage Temperature:
-40° to +150°F (-40° to +65°C)
1
2-10 VDC
2
0(2)-10 VDC, 10-0(2) VDC
Table 1. Models.
Model Number
Control Input /
Output
Description
SPST
Aux
Switches
1/2”
360°
Conduit
Shaft
Adaptor Torque Supply Voltage
Driving/
Holding
(VA)
Drive
(sec)
MS7103A1021 Modulating (1) No Yes
SCSA
27 lb-in
(3Nm)
24 VAC +/-20% @
50/60 Hz class 2
transformer,
24 VDC +20%/-10%
4/2 90
MS7103A2021
Modulating (1),
Feedback
No Yes
MS7103A2221
Modulating (1),
Feedback
Yes Yes
MS7503A2021 Modulating (2),
Floating,
Feedback
No Yes
MS7503A2221 Yes Yes
MS7103A2024
Modulating (1),
Feedback
No No U-Bolt
MS7103A2224 Yes No U-Bolt
MS3103J1023
Sylk BUS
No
Yes U-Bolt
4.5/2 30-180
MS3103J1024 No U-Bolt
MS3103J1221
Yes
Yes SCSA
MS3103J1222 No SCSA
MS3103J1223 Yes U-Bolt
MS3103J1224 No U-Bolt
MS3103J1021
No
Yes SCSA
MS3103J1022 No SCSA
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