Danfoss AK-PC 572 Installation Manual - Page 4
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External display
R = 1200Ω
L→H
Bitzer CRII
The pulse signal can also be used to control one of the CRII with 2 unloaders (4 cylinders' version).
Compressor capacity can be controlled from 10 to 100% depending on the pulsation of the unloaders.
The unloaders are connected to DO5 and DO6.
Connect compressor relay to DO-MT1.
Unloader 2 follows unloader 1
but is offset a ½ period.
Important
Read the following before you connect the controller and the two
valve modules to the supply voltage.
The EKE 1P is pre-configured to determine the extension module
mode based on the AI4 status of the EKE 1P:
AI4 Open circuit: high pressure module
AI4 short circuit to 5V: receiver module
Alternatively the EKE 1P configuration may be set by connecting
a graphical display to the EKE 1P. See separate EKE 1P documenta-
tion.
If you wish to check the addresses of the two valve modules, you
should carry out the following:
1. Connect all modules to the power supply.
2. Immediately press on both the "X" and "Enter" buttons while the
controller is starting up.
3. Find the display "CAN SETTINGS" > "ACTIVE NODES"
4 | AN29572719924701-000201
Extension modules
H - R
R120
Bridge - CAN H
CAN H
Red
CAN L
Green
C GND
Yellow
The two 1-digits represent the addresses 96 (HP module) and 97
(Receiver module) respectively.
If you remove the connection to a valve module, the display of
the address will also disappear.
MODBUS master
0 V / Open
5 V
RS-485
ANALOGUE / DIGITAL INPUT
CAN-RJ
RS-485
ANALOGUE / DIGITAL INPUT
CAN RJ
High pressure
Receiver
Unloader 1
Unloader 2
© Danfoss | DCS (vt) | 2019.12
CAN-RJ
CAN RJ