OJ Electronics AHC-3000 Serie Mode D'emploi page 3

Connection of OJ -DV fan drives
The supply/exhaust fan DV drives must be connected to port B1 or B2 on
the AHC-3000 (see Fig. 4) and port B on the DV drives.
The address of the supply fan is 54 dec and this can be selected by a
special Modbus cable without pin 5 connected – see Fig. 19.
The address of the exhaust fan is 55 dec.
It is not allowed to have multiple DV drives connected with the same
address.
OJ DV address Function
54 dec Supply fan use special Modbus cable.
55 dec Exhaust fan, use standard Modbus cable.
Connection of DRHX rotary heat exchanger drives
The DRHX drive must be connected to port B1 or B2 (see Fig. 4) ) and port
B on the DRHX drives.
The correct (and default) address of the DRHX is 75 dec.
Connection of OJ-Air2Ext I/O extension module
The OJ-Air2Ext must be connected to port B1 or B2 – see Fig. 4
This is used if more inputs/outputs are required than available on the AHC-
3000 controller. Power supply to the OJ-Air2Ext is supplied from AHC-3000
through the Modbus cable. Only one OJ-Air2Ext is allowed. Temperature
sensors must be connected to OJ-Air2Ext and have higher priority than
sensors connected directly to AHC-3000.
Set the address selector according to the desired function, see table:
OJ-Air2Ext
Output
address selector
3
After heating coil
Tin1
Tin2
Aout1
Aout2
Din1
Din2
Dout1
Dout2
4
After cooling coil
Tin1
Tin2
Aout1
Aout2
Din1
Din2
Dout1
Dout2
SPECIFICATION
Temperature sensor input.
AHC-3000 is equipped with following five temperature sensor inputs. All
temperature inputs must be connected to max. 30m wire
Description Specification
TI1 NTC/PT1000
TI2 NTC/PT1000
TI3 NTC/PT1000
TI4 NTC/PT1000
TI5 NTC/PT1000
Temperature inputs (TI1 to TI5)
Input type: configurable NTC 12kΩ or PT1000 temperature sensor (NTC
12k @ 25°c) (PT1000 Ω @ 0°C)
Input range: -40°C to +100°C measurement range
Function
Return water temperature
Supply air temperature
Heating valve 0-10V
Not used
Not used
Frost thermostat
Heating start relay
Not used
Not used
Supply air temperature
Cooling valve 0-10V
Not used
Cooling coil alarm
Not used
Cooling start relay
Not used
Default Function
Supply air temperature
Extract air temperature
Outdoor air temperature
Exhaust air temperature
Return water temperature,
heater coil
Input accuracy NTC
• ±0.1°C (0°C to 50°C) @ 23±5°C ambient (excluding sensor tolerance)
• ±0.2°C @ all sensor-/ambient temperatures (excluding sensor
tolerance)
Input accuracy PT1000
• ±0.1°C (0°C to 50°C) @ 23±5°C ambient (excluding sensor tolerance)
• ±0.4°C @ all sensor-/ambient temperatures (excluding sensor
tolerance)
Electrical connections are shown in Fig. 14.
Digital inputs
AHC-3000 is equipped with seven potential-free digital inputs:
All inputs range from 0.0-2.0V (low) to 10.0-12.2V (high logic level) Internally
pulled up to 12VDC, 1.8mA pull-up current while low. Max. cable length
30 m.
Alternative settings in the table are listed in ( ) and can be edited from the
HMI-35T.
Description
DI1
DI2
DI3
DI4
DI5
DI6
DI7
Electrical connections are shown in Fig. 7
Other configurations can be used depending on the factory configuration.
The digital inputs can be altered from the HMI-35T to:
Function
Outdoor filter alarm
Extract filter alarm
Frost alarm
EL-heater alarm
Summer/winter
Cooler alarm
Analogue inputs
AHC-3000 is equipped with 3 analogue inputs for 0-10 V DC signals.
Max. cable length 30 m.
Description
AI1
AI2
AI3
Electrical connections are shown in Fig. 8.
Other configurations can be used depending on the factory configuration.
Digital outputs
AHC-3000 is equipped with six potential-free digital relay outputs, and one
solid state output.
Digital outputs 1 – 3 must be connected to max. 250VAC/3A AC1
DO1, DO2 and DO3 are internally connected to terminal 1 COM. See Fig. 11
Digital outputs 4 – 6 must be connected to max. 30VAC/3A AC1. See
Fig. 12
Digital output 7 must be connected to max. 30 VAC/DC max. 1A. See
Fig. 12
Note: DO6 and DO7 are only available on AHC-3000-T and AHC-3000-B.
Alternative settings in the table are listed in ( ) and can be edited from the
HMI-35T.
© 2020 OJ Electronics A/S
Default Function Active
Alarm, supply fan Closed (Open, Tacho)
Alarm, exhaust fan Closed (Open, Tacho)
Alarm, filter Closed (Open)
Smoke Open
Start Closed
Boost speed Closed
Fire Open
Active
Closed (Open)
Closed (Open)
Open
Open
Closed summer - cooling available,
Open winter - heating available.
Open
Default Function
CO 0 to 2000 ppm
2
Room temperature 0 to +50⁰C / supply air duct
pressure 0 to 500 Pa (20-3000 Pa)
RH% 0 to 100 %RH / extract air pressure 0 to 500 Pa
(20-3000 Pa)
3