215
J20741 - Subject to change. © Belimo Aircontrols (USA), Inc.
LM
Wiring Diagram
LMX120-SR - Typical Specification:
Proportional control damper actuators shall be electronic
direct-coupled type, which require no crankarm and link-
age and be capable of direct mounting to a shaft from 1/4”
to 5/8”. Actuators must provide proportional damper con-
trol in response to a 2 to 10 VDC or, with the addition of a
500Ω resistor, a 4 to 20 mA control input from an elec-
tronic controller or positioner. Actuators shall have
Brushless DC motor technology and be protected from
overload at all angles of rotation. Actuators shall have
reversing switch and manual override on the cover. Run
time shall be constant and independent of torque. A 2 to
10 VDC feedback signal shall be provided for position
indication. Actuators shall be cULus listed, have a
5-year warranty, and be manufactured under ISO 9001
International Quality Control Standards. Actuators shall
be as manufactured by Belimo.
LMX120-SR
Proportional Control, Non-Spring Return, Direct Coupled, 100 to 240 VAC, for 2 to 10 VDC and 4 to 20 mA
1
2
1 Neutral
2 Hot +
N L1
H L2
1
2
Provide overload protection and disconnect as required.
Actuators may be connected in parallel. Power
consumption and input impedance must be observed.
4
3
3
The ZG-R01 500Ω resistor converts the 4 to 20 mA
control signal to 2 to 10 VDC, up to 2 actuators may
be connected in parallel.
5
Only connect common to neg. (–) leg of control circuits.
4
To other
actuators
5
1 Common
2 Hot +
3 Y Input,
2 to 10V
5 U Output, 2 to 10V
4 to 20 mA
2 to 10 VDC
(–)
(+)
Ω
500Ω
Notes:
10
SGF24
SGA24
or
Meets cULus requirements without the need of an
electrical ground connection.
100 to 240 VAC
Cable 2Cable 1
Orange
W368REV
2 to 10 VDC and 4 to 20 mA control of LMX120-SR
Accessories
K-LM20 3/4” [20 mm] Shaft Clamp
AV6-20 Shaft Extension
ZG-LMSA Shaft Adaptor for 1/2” Diameter Shafts
ZG-LMSA-1 Shaft Adaptor for 3/8” Diameter Shafts
ZS-100 Weather Shield - Steel
ZS-150 Weather Shield - Polycarbonate
Tool-06 8 mm & 10 mm Wrench
S1A, S2A Auxiliary Switch (es)
S1B, S2B Auxiliary Switch (es)
P370 Shaft Mount Auxiliary Switch
P…A Feedback Potentiometers
SGA24 Min positioners in NEMA 4 housing
SGF24 Min positioners for flush panel mounting
PTA-250 Pulse Width Modulation Interface
IRM-100 Input Rescaling Module
ADS-100 Analog to Digital Switch
ZG-R01 Resistor for 4 to 20 mA Conversion
NSV24 US Battery Back-Up Module
Note: When using LMX120-SR actuators, only use acces-
sories listed on this page.
®
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