8. Extension module
40
8.4 Connection to the GD Connect 12
The module is connected to the GD Connect 12 via the
built-in RS485 interface.
The extension module will be delivered with a 3 wire
connection cable (1m ).
This will be connected to the RS485-2 of the GD
Connect 12.
For longer distances, the cable should be removed and
an appropriate cable is to create.
If several extension modules are used, they are
connected in the same way as the compressor controls
in a bus structure.
Extenstion
The wiring diagram showing how to connect the RS485
interface to the GD Connect 12 can be found in the
annex.
The DIP switch settings for addressing the module and
for switching bus termination on and off are also listed
there.
8.5 Connection of external signals
The sensors and switches for digital and analog inputs
are connected directly to the extension module.
The appropriate terminals can be found in the annex.
After connecting an extension module, the inputs and
outputs can be programmed in the “Adjustments
Extension module" menu.
Digital inputs
Programmable functions of digital inputs DI-1..8:
No use
Activate profile 1 / 2 / .. / 12
Warning Dryer 1..4
Warning Filter 1..4
Warning Bekomat 1..4
Warning Dew point
Warning External
In addition, two further parameters are programmable
for the digitial inputs to each function:
A delay, which avoids, that the appropriate
message is indicated to early.
The condition of the digital input, which indicates
the programmed message (input open or closed).
Digital outputs
Programmable functions of digital outputs DO-1..2:
No use
Collective warning
Collective fault
Coll. warning/fault
Warning Line press. max.
Warning Line press. min.
Warning Compressor
Fault Compressor
Warn/Fault Compr.
Warning Dryer
Warning Filter
Warning Bekomat
Warning External
Coll. warn. Temperature
Warn. Temperature 1..8 max.
Warn. Temperature 1..8 min.
Coll. warn. Dew point
Warning Dew point 1..8
Compr. on load
Compr. motor running
Profile 1 / 2 / .. / 12 active
Station off
Extension
module 1
GD
Conn.12
Extension
module 2
