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Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
Aggregates
01.04.2010
8.4
Motor
The motor block controls and monitors all motor functions. Six independent motor
blocks are available.
There are 3 different types:
1-speed motor (pump, fan)
2-speed motor (fan)
Twin motor (twin motor, twin pump)
Inputs
Outputs
Input
Section
Output
Section
Precommand checkback signal
Precommand
V
Flow signal
A
B
Motor A, Motor B output
A B
Motor A-, Motor B-Overload signal
Motor operating state
2
1
Start
Start condition 1, Start condition 2
Motor fault
1 2
Stop
Stop condition 1, Stop condition 2
For optimum control and supervision, the motor block in RMS705B offers the
following functions for all motor types:
Adjustable delay times (Section 8.4.5).
Switch-on to outside temperature for 1-speed motor and twin motor
(Section 8.4.13).
Selectable motor kick (Section 8.4.14).
Assignable text (Section 8.4.17).
Assignable fault texts (various sections).
Operating hours count (Section 8.4.18).
Purpose
Explanation of symbols
Control and supervision
functions