Bitzer VARIPACK FDU+12, Operating Instructions Manual

Page: 51 / 72

CB-100-1 51
A
B C
D
E
Fig. 10: Power connections (power cable and motor cable) with fix-
ture
A Earth connection B Power cable / termin-
als for power supply
C Motor cable / motor
terminals D Cable clips
E Ferrite core
5.3 Control connections (inputs and outputs)
Information
To meet the EMC and safety requirements, the
control module must be connected to the pro-
tective earth conductor outside the device!
Information
The entire external wiring must be approved for
maximum system voltage!
All control and signal terminals guarantee safety
extra low voltages (PELV), i.e., they are protec-
ted by double insulation.
Specification of the control connections:
• Lines without and with wire end sleeve according to
DIN 46228 Part 1: 0.25 .. 1.5 mm²:
• Lines with wire end sleeve according to DIN 46228
Part 4 (insulated wire end sleeve): 0.25 .. 0.75 mm²:
Digital inputs
• Function
– X13: 2: DI1 (Start)
Compressor start command.
– X13: 3: DI2 (Force)
Operation of the compressor at a minimum fre-
quency of 50 Hz.
– X13: 4: DI3 (pe1 ￫ pe2)
External control: without function.
With extension module: Switch over from evapor-
ation temperature setpoint 1 to 2.
– X12: 1: DI4 (pc1 ￫ pc2)
External control: without function.
With extension module: Switch over from con-
densing temperature setpoint 1 to 2.
– X12: 2: DI5
Reset of faults.
– X12: 3: DI6
Automatic detection of the extension module.
• Technical data
– Status:
Off: 0 .. 5 V DC
Undefined: 5 .. 15 V DC
On: 15 .. 24 V DC
– Max. input voltage: ±30 V DC
– Input impedance: 3.3 kΩ.
– Input current: 7.3 mA ±10% at 24 V DC
Analogue inputs
• Function
– X11: 1: AI1 (n / pe)
External control: Setpoint as 4 .. 20 mA signal.
With extension module: Input for low pressure
coming from the extension module.
– X11: 2: AI2 (n / pc)
External control: Setpoint as 0 .. 10 V signal.
With extension module: Input for high pressure
coming from the extension module.
• Technical data
– Input signal: 0 .. 10 V or 4 .. 20 mA