OJ Electronics AHC-3000 Serie Mode D'emploi page 4

Description Output
DO1 Relay connected to COM
DO2 Relay connected to COM
DO3 Relay connected to COM
DO4 Potential-free relay
DO5 Potential-free relay
DO6 Potential-free relay
DO7 FET connecting to G0
Electrical connections are shown in Figs. 11 and 12.
Other configurations can be used depending on the factory configuration.
Max. cable length 30 m.
Analogue outputs
AHC-3000 is equipped with four 0-10 V DC analogue outputs, which
can be used to connect control signals for a heat exchanger (rotary heat
exchanger or damper motor on cross-flow/counter-flow heat exchanger),
heating or cooling coil valves and fans.
Each output can be loaded by max. 10mA @ 10V, or min. 1k ohm. Max.
cable length 30 m.
Alternative settings in the table are listed in ( ) and can be edited from the
HMI-35T.
Output no. Output function - Factory setting
Heat exchanger bypass damper/rotor drive (supply
AO1
air unit mixing damper).
AO2 Heating or cooling coil valve actuator
AO3 Exhaust air fan speed
AO4 Supply air fan speed
Electrical connections are shown in Fig. 13
Other configurations can be used depending on the factory configuration.
Max. cable length 30 m.
TECHNICAL DATA
Processor .............................................................................................. 32 bit
Operating system ............................................................. Proprietary system
Supply voltage ..................24 V AC ± 10 %, 50/60 Hz / or 23 VDC to 30VDC
Power consumption ....................1.8VA @ 24VAC / 0.8W @ 24VDC (no load)
Power consumption AHC-3000-S .................9VA @ 24VAC / 4.0W @ 24VDC
Power consumption AHC-3000-T/B ..........25VA @ 24VAC / 11.0W @ 24VDC
Electrical connection .....................Max. 1.5 mm² solid wire, screw terminals
Max. 4 mm² solid wire, screw terminal on terminal 1 to 4
TCP/IP ..........................................................10/100 Mbit shielded RJ45 port
HMI port .................................. Modbus RS485 115kBaud 120Ω termination
BMS port ............................ Modbus RS485 max. 115kBaud, no termination
Modbus port B1,B2 .............................RS485, 38,4kbaud, 120Ω termination
Load on port B1 and B2 in total ........................................... +24VDC output,
Modbus port A ....................................RS485, 38,4kbaud, 120Ω termination
Digital inputs ..................................... 7x 12 V DC pull-up cable length ≤30 m
Analogue inputs ............................. 3x 0-10 V DC ≥20kΩ cable length ≤30 m
Sensor inputs ............................ 5x PT1000 / NTC 12kΩ cable length ≤30 m
Digital output (DO1-3) .................................Max. 250VAC/3A AC1 or 30VDC
Digital output (DO4-6) .............................................Max. 30VAC/3A AC1/DC
Digital output (DO7) ................................................ Max. 24VAC/DC max. 1A
Analogue outputs ...................................... 4x 0-10 V DC cable length ≤30 m
Ambient operating temperature ..................................................-40°C/+50°C
Dimensions .........................................................................156 x 90 x 45 mm
Modbus cable dimension ................................................. MPFK6S or similar
Enclosure ........................................................................................ IP20, ABS
Weight .................................................................................................... 240g
EMC-correct installation
There are no requirements for shielded cables for I / O and internal Modbus
communication,
All cables and wires used in connection with AHC 3000 must comply with
local and national regulations and regulations.
4
Default Function
Coil 1 Heating, cooling or
combi coil heating.
Active on
El-heater coil 2 or combi
coil cooling. Active on.
Damper opening. Active on
A alarm. Active on
B alarm. Active on
Supply fan (Heat recovery).
Active on
Exhaust fan. Active on
(max. load)
(max. load)
max. 260mA continuously
© 2020 OJ Electronics A/S
COMMUNICATION
External communication
AHC-3000 can be connected to the following external communication:
OJ Cloud, OJ ZoneMaster, BMS Modbus RTU and BMS Modbus TCP/IP.
Cloud
See the instructions for details regarding connection to OJ Air Cloud.
Modbus
Modbus protocol can be downloaded from www.ojelectronics.com
SERVICE AND MAINTENANCE
No special maintenance is required. Please contact your supplier if faults
arise.
Bluetooth
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The Bluetooth word mark and logos are registered trademarks owned
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by the Bluetooth SIG, Inc. and any use of such marks by OJ Electronics
is under licence. Other trademarks and trade names are those of their
respective owners.
Key to symbols
Particular attention should be paid to the sections in these instructions
which are marked with symbols and warnings.
Warning
This symbol is used where there is a risk of severe or fatal personal injury.
Caution
This symbol is used where potentially dangerous situations may result in
minor or moderate personal injury. The symbol is also used to warn against
unsafe and hazardous conditions.
Note
This symbol is used to indicate important information and in situations
which may result in serious damage to equipment and property.
Ensuring safety before installation
AHC-3000 must only be installed by qualified personnel or people who
have received appropriate training and are qualified to install the product.
Qualified personnel have knowledge of the installation practices used and
can perform installation in accordance with relevant local and international
requirements, laws and regulations.
Qualified personnel are familiar with the instructions and safety precautions
described in this introduction.
AHC-3000 contains a dangerously high level of voltage when connected to
the mains.
Mains voltage must always be disconnected before any installation,
servicing or maintenance tasks are performed on the product.
When the AHU is connected to the mains, there is a risk that the unit could
start unintentionally, possibly causing dangerous situations and personal
injuries
An unintentional start during programming, servicing or maintenance may
result in serious injury or damage to equipment and property.
The AHC-3000 can be started via an external input signal, Modbus or a
connected control panel.
Before connecting mains voltage to AHC-3000, all AHC-3000, motor and
fan components must be properly fitted.
Before connecting mains voltage to AHC-3000, all openings, covers and
cable glands must be properly fitted and closed. Unused cable glands
must be replaced with blank glands.
Prohibition on use
The AHC-3000 must not be commissioned until the machine or product
into which it is incorporated has been declared in its entirety to be in
conformity with all relevant national and international regulations.