Danfoss AK-PC 781A User Manual page 9

1. Controller
Type Function
Controller for capacity control of compressors and condensers
AK-PC 781A
10 compressors with up to 3 unloaders, 8 fans, max. 120 inputs/outputs
2. Extension modules and survey of inputs and outputs
Type Analog
inputs
For sensors, pres-
sure transmitters
etc.
Controller 11
Extension modules
AK-XM 101A 8
AK-XM 102A
AK-XM 102B
AK-XM 103A 4
AK-XM 204A
AK-XM 204B
AK-XM 205A 8
AK-XM 205B 8
AK-XM 208C 8
The following extension module can be placed on the PC board in the controller module.
There is only room for one module.
AK-OB 110
3. AK operation and accessories
Type Function
Operation
AK-ST 500 Software for operation of AK controllers
- Cable between PC and AK controller
Accessories Power supply module 230 V / 115 V to 24 V d.c.
AK-PS 075 18 VA
AK-PS 150 36 VA
AK-PS 250 60 VA
Accessories External display that can be connected to the controller module. For showing, say, the suction pressure
EKA 163B Display
EKA 164B Display with operation buttons
EKA 166 Display with operation buttons and LED for function cut in
MMIGRS2 Graphic display with operation
Cable between EKA display and controller
-
Cable between graphic display and controller
Accessories Communication modules for controllers where modules cannot be connected continuously
AK-CM 102 Communication module
On the following pages there is data specific to each module.
AK-PC 781A
On/Off outputs
Relay Solid state
(SPDT)
4 4
8
8
8
8
Capacity controller RS8HE202 © Danfoss 2017-07
On/off supply voltage Analog
(DI signal) outputs
Low voltage High voltage 0-10 V d.c.
(max. 80 V) (max. 260 V)
- -
8
8
Application
Compressor / Condenser / Both/
Oil management / Heat recovery / CO2 gas
pressure
Stepper Module with
output switches
For valves For override of
with step relay outputs
control
-
4
4
2
Application
AK-operation
USB A-B (Standard IT cable)
Supply for controller
Length = 2 m, 6 m
Length = 1.5 m, 3.0 m
Data communication for external extension
modules
-
x
x
9