2. Control Functions
Control functions on the module
SMGB0097 rev.0 - 07/2015
28
2.1.14 Operation from DC24V contact input
Outline
The procedure to control operation from the DC24V contact of the local central controller is shown below.
• Level input
•
Pulse input (1 switch)
•
Pulse input (2 switches)
Arrange the settings and additional wiring necessary for each of them, as shown in the following sections. Available only in
remote mode during independent operation of the chiller unit.
Level input
a.
Signal aspect and basic sequence
For wiring
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Terminal
board
Section arranged as a local work
Alarm output (DC24V, less than 0.8A)
Relay coil for DC24V, etc. (to be prepared
locally) (The relay coil is powered on in
case of alarm) Do not connect a LED or a
relay of internal diode type.
Run/stop switch (to be
prepared locally)
Time chart
Switch
Keep more than 5 minutes
ON
OFF
Run
Stop
Chiller
unit
N O T E
Level input indicates a continuation of switch ON status when the system is in operation as shown in the diagram
above.