Siemens LMV5 Quick Start Manual page 129

Load Controller Modes & Sensors
The LMV51.140 and LMV52 both have a load controller that can read press / temp directly.
The LMV51.040 must be used with a floating/bumping external load controller, such as a RWF40.
When the LMV5 load controller is configured, different inputs are expected on different terminals:
If an analog press/temp sensor is used, Input 2, Term X61.2 or X61.3 is required.
If remote setpoint / remote modulation is used, Input 3, Term X62.2 or X63.3 is required.
If RTD temp sensor(s) are used, Input 1, Term X60.1, or Input 4 Term X60.3 is required.
If an analog signal does not exist on the previously motioned terminals when the mode is selected
(0 mA when 4-20mA is selected, for example) the LMV5 will fault. See section 3-3 for wiring.
If the incorrect mode of load controller is selected for the connected instrumentation or analog
signal, the LMV5 will fault.
Figure 5-1.1 details which terminals should have sensors wired for the given load controller mode.
Figure 5-1.1 Required sensors for Load Controller mode
Mode Label
1 ExtLC X5-03
2 IntLC
3 Int LC bus
4 Int LC X62
5 ExtLC X62
6 ExtLC Bus
On a steam boiler, a temperature sensor can be used in addition to the pressure sensor,
for the cold start function.
In this case, an input is expected for both, a pressure sensor and a temperature sensor
in modes 2 thru 4.
LMV5 QSG Rev 4
Description
External Load Control Floating / Bumping
Internal Load Control
Temp. or Press.
sensor connected to LMV5
Internal Load Control
Temp. or Press
sensor connected to LMV5
remote setpoint via Modbus
Internal Load Control
Temperature or Pressure sensor
connected to LMV5
remote setpoint via analog input
External Load Control
analog signal connected to X62
External Load Control via ModBus
Sec 5 Pg 3
Expected Input Terminals
(See Section 3-3)
X5-03.02 and X5-03.03
Temperature
X60.1, X60.2, X60.3, X60.4
OR
Pressure
X61.1, X61.2, X61.3, X61.4
Temperature
X60.1, X60.2, X60.3, X60.4
OR
Pressure
X61.1, X61.2, X61.3, X61.4
ALSO
Modbus Connection
Temperature
X60.1, X60.2, X60.3, X60.4
OR
Pressure
X61.1, X61.2, X61.3, X61.4
ALSO
Analog input
X62.2, X62.3, X62.4
Analog input
X62.2, X62.3, X62.4
Modbus Connection
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