User Manual

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Building Technologies Division CC1N7491en
18.07.2018
Connectors list (cont´d)
No.
Connector
type
Pin code
print on
PCB
Description LMU34.2
X700
Lumberg 3850
2 poles
PELV: PWM heating circuit pump Cable length ′1 m
1 PWM +
Output voltage at Iout
= 1 mA:
DC 7 V ±5%,
Ri = 100 R
Output voltage at Iout =
10 mA:
DC 6,2 V ±5%,
Ri = 100 R
Output current (short-
circuit proof):
Max. 10 mA
PWM frequency: 300 Hz
2 GND
X800
Stocko
MKS1852-6-0-202
2 poles, coded
Lumberg
2.5 MSF02(3114)
2 poles
1 / 2 PELV: OpenTherm V2.3 Cable length ′40 m
X900 Tabs 6.3 mm PELV: Functional earth (burner ground) (not for protection purposes) Cable length ′ 1 m
PELV: Protective Extra Low Voltage – Low voltage connection
The unit is supplied with the temperature setpoint potentiometer in the OFF position.
¹) Only use components approved by Siemens AG!
²) A special conversion list (hard copy) must be used to retrieve correct measurement
values and to set correct threshold values to related functions
³) The fan must meet the requirements of specification
LMU5x_TrafoFan_en_V1.2.doc, chapter 3 “Specification for fans with mains voltage
operated DC motor”