SECOP Electronic Unit for BDN45F/50K Compressors Instructions
- October 30, 2023
- SECOP
Table of Contents
SECOP Electronic Unit for BDN45F/50K Compressors
Product Information
The Electronic Unit for BDN45F/50K Compressors is a device that allows for the control of compressors. It has a voltage range of 12-24V DC and is equipped with a fuse main switch, non-PC option, display, power supply, fan, and Secop Gateway. The device also includes an NTC resistor mechanical thermostat, LED, and spade connectors 6.3 mm | 1/4 in. It is made in Germany by Secop.
The electronic unit is a dual voltage device. This means that the same unit
can be used in 12V or 24V power supply systems. Maximum voltage is 17V for a
12V system and 34V for a 24V power supply system. It can be connected to a PC
through the Secop Gateway communication interface on the terminal LIN and C
(Fig. 1). Communication gateway modules incl. communication cables can be
ordered at Secop (Fig. 8). The PC interface allows you to create different
settings and reads out several measurements by using the software TOOL4COOL®
supplied by Secop.
Periphery
| Secop Gateway | 105N9518* |
|---|---|
| Thermistor multi-pack | 105N9615 |
*The previous gateway (105N9501) is not fully compatible with electronics using LIN bus above 24V. Please use the most recent gateway version.
Installation
Attach the electronic unit by pressing it linearly onto compressor Fusite®
connector and brack-ets. Press until both screwheads snap in place. Optionally
the unit can be secured against ex-cessive vibration with a third screw (Fig.
3).
Power supply (Fig. 1)
The electronic unit must always be connected directly to the battery poles.
Connect the plus to + and the minus to –, otherwise the electronic unit will
not work. The electronic unit is protected against reverse battery connection.
For protec-tion during installation, a fuse must be mounted in the + cable as
close to the battery as possible. A 15A fuse for 12V and a 15A fuse for 24V
cir-cuits are recommended. If a main switch is used, it should be rated to a
current of min. 20A.
The wire dimensions in Fig. 4 must be observed. Avoid extra junctions in the
power supply system to prevent voltage drop from affecting the battery
protection setting.
Wire dimensions DC
Recommended connector types
| Power Supply | 2-circuit | Molex: 945504102 |
|---|---|---|
| Fan | 2-circuit | Molex: 945504202 |
| Display/Communication | 3-circuit | Molex: 932504023 |
| Thermostat/Program | 3-circuit | Molex: 932504003 |
| Crimp 0.5 – 0.75 mm | Molex: 945180100 | |
| Crimp 0.75 – 2.5 mm | Molex: 945180201 |
Battery protection
The compressor stops and restarts again accord-ing to the designated voltage
limits measured on the + and – terminals of the electronic unit. The standard
settings for 12V and 24V power supply systems are shown in Fig. 2. (PC
option). Other settings are (Fig. 5) optional if a connec-tion which includes
a resistor (R1) is established between terminals C and P (non PC option).
Battery protection settings
| Voltage (0.1 steps) | Default | Min. value | Max. value |
|---|---|---|---|
| 12V ± 0.3V DC, all values | Cut out level | V DC | 10.4 |
| 24V ± 0.3V DC, all values | Cut out level | V DC | 21.3 |
| Battery cut-in difference | V DC | 1.3 | 0.5 |
Thermostat
The thermostat is connected between the termi-nals C and T. Either a NTC
(electrical thermostat) or a mechanical thermostat can be connected. Three
different thermostat modes can be chosen in the software – Auto (both NTC and
mechani-cal), NTC or Mechanical. Standard setting is Auto. In case of using a
NTC the set point in the range between -40ºC and 40ºC is set with the software
and the temperature can also be seen by using the interface. When using the
Auto set-ting in the software it is not possible to obtain NTC failures, so it
is recommended to set the thermostat mode to NTC when using a NTC.
Customer display
A Customer designed display can be supplied by the electronic unit and used to control e.g. the speed settings, battery protection settings or temperature settings. The used display can communicate with the electronic unit via the LIN terminal and Modbus protocol. The display pow-er supply can be achieved via an unprotected output of the battery voltage and C. For more detailed recommendations on how to use and in-itialise a customer display please contact Secop. Do not use the battery + terminal above LIN to supply the controller with power.
Speed selection
The compressor will run with a fixed speed of 3,000 rpm when the thermostat is
switched on. Other fixed compressor speeds and start speeds in the range
between 2,300 and 4,500 rpm can be obtained when changing the speed settings
in the software (PC option) or with resistor R1 (non PC option). A connected
resistor overrules the speeds con-figured by software. A start delay in the
range from 0 – 240 sec. (factory setting 2 sec.) after thermostat cut-in can
also be chosen.
R1 [kΩ]| Duty Cycle [%]| Speed [RPM]| Cut in level [V]|
Cut out level [V]| Cut in level [V]| Cut out level [V]|
Mode
---|---|---|---|---|---|---|---
open| 0| Maintain| Maintain current value. Can be changed via Modbus|
Delivery/external display
91| 9| Maintain| Maintain current value. Can be changed via Modbus| ECO on
68| 12| Maintain| Maintain current value. Can be changed via Modbus| ECO off
51| 15| Maintain| Battery protection off (full envelope 9.6V to 34V)| Solar on
43| 18| Maintain| Reset battery protection to default. Maintain speed| Solar
off
36| 21| Maintain| 11.7| 10.4| 22.6| 21.3| Reset battery
---|---|---|---|---|---|---|---
30| 24| 3000| 11.7| 10.4| 22.6| 21.3| Reset battery/speed
---|---|---|---|---|---|---|---
27| 27| 4500| Maintain current value. Can be changed via Modbus| Default mode
---|---|---|---|---
22| 30| 4500| 10.9| 9.6| 22.6| 21.3
20| 33| 4500| 11.4| 10.1| 23.6| 22.3
18| 36| 4500| 12.4| 11.1| 24.6| 23.3
15| 39| 4500| 13.4| 12.1| 25.6| 24.3
13| 42| 3800| Maintain current value. Can be changed via Modbus
12| 45| 3800| 10.9| 9.6| 22.6| 21.3
11| 48| 3800| 11.4| 10.1| 23.6| 22.3
9.1| 51| 3800| 12.4| 11.1| 24.6| 23.3
8.2| 54| 3800| 13.4| 12.1| 25.6| 24.3
7.5| 57| 3200| Maintain current value. Can be changed via Modbus
6.2| 60| 3200| 10.9| 9.6| 22.6| 21.3
5.6| 63| 3200| 11.4| 10.1| 23.6| 22.3
5.1| 66| 3200| 12.4| 11.1| 24.6| 23.3
4.3| 69| 3200| 13.4| 12.1| 25.6| 24.3
3.9| 72| 2700| Maintain current value. Can be changed via Modbus
3.3| 75| 2700| 10.9| 9.6| 22.6| 21.3
2.7| 78| 2700| 11.4| 10.1| 23.6| 22.3
2.2| 81| 2700| 12.4| 11.1| 24.6| 23.3
1.8| 84| 2700| 13.4| 12.1| 25.6| 24.3
1.5| 87| 2300| Maintain current value. Can be changed via Modbus
1.0| 90| 2300| 10.9| 9.6| 22.6| 21.3
0.68| 93| 2300| 11.4| 10.1| 23.6| 22.3
0.36| 96| 2300| 12.4| 11.1| 24.6| 23.3
0.051| 99| 2300| 13.4| 12.1| 25.6| 24.3
Fan
A fan can be connected to the FAN OUT termi-nals. Connect the plus to F+ (FAN
OUT) and the minus to F-. Since the output voltage between the terminals F+
(FAN OUT) and F- is always regulated to 12V, a 12V fan must be used for both
12V and 24V power supply systems.
- The fan output can supply a continuous power of 6Wavg.
- Fan settings can be adjusted via TOOL4COOL®. It is also possible to set a start delay on the fan in the range from 0 – 240 sec..
- Factory default setting for a fan is 0 seconds. Fan speed can be adjusted through the interface from 40 – 100%.
Error handling
If the electronic unit records an operational error, the error can be read out
in the software (PC option). Error codes are defined as shown in Fig. 7. A
standard light emitting diode (LED) can alter-natively be connected between
the terminals LIN and +, when using a series resistor of about 1800 Ohm. In
case the electronic unit records an op-erational error, the diode will flash a
number of times. The number of flashes depends on what kind of operational
error was recorded. Each flash will last ⅕ second. After the actual number of
flashes there will be a delay with no flashes, so that the sequence for each
error recording is repeated every 4 seconds (non PC option).
Operational errors (PC or non PC option)
Error code or LED flashes| Error type
Can be read out in the software TOOL4COOL®
---|---
7| Communication error
(Communication of master controller stopped for 15 minutes (default))
6| Thermostat failure
(If a NTC thermistor is short-circuit or has no connection, the electronic
unit will enter manual mode).
5| Thermal cut-out of electronic unit (PCB or machine compartment
temperature exceeds minimum or maximum limits).
4| Minimum motor speed error
(If the refrigeration system is too heavily loaded, the motor cannot
maintain minimum speed at approximately 2,150 rpm).
3| Motor start error
(The rotor is blocked or the differential pressure in the refrigeration
system is too high (>5 bar)).
2| Fan over-current cut-out
(The fan is overloading the electronic unit).
1| Battery protection cut-out
(The voltage is outside the cut-out setting).
Machine compartment temperature
The electronic unit disables the compressor op-eration in case its PCB
exceeds the maximum limits. The electronic unit does not limit the com-pressor
to operate in its released conditions. It must be ensured the machine
compartment tem-perature does not exceed the compressors maximum ratings,
otherwise it might be damaged. Min. PCB temperature: -10°C (14°F) Max. PCB
temperature: 110°C (230°F) Please refer to the compressor datasheet re-garding
operating conditions and machine com-partment temperature.
Connecting TOOL4COOL® to Electronic Unit 101N2740
The communication port of the electronic unit (terminal LIN, + and C) has two functions:
- Communication mode (PC option): The first 15 seconds after power up/wake up, both devices (compressor & PC) try to communicate. In case a successful connection is made, the port will stay in communication mode until next power up/wake up.
- Diode output mode (non-PC option): After 15 seconds with no communication link successful established, the unit switches to diode output mode.
No communication is possible until next power-up/wake-up.
To ensure a trouble-free connection using TOOL4COOL®, the following method
is recommended:
Change the default TOOL4COOL® network setup to allow TOOL4COOL® to search for
the electronic unit every 3 seconds. While TOOL4COOL® is sear-ching, power up
the electronic unit and wait for a connection.
The following shows how to arrange this setup.
Preconditions:
The electronic unit is physically connected via the gateway to the PC, but the
power to the electronic unit is not yet switched on. In the example to the
right, the electronic unit is con-nected to the COM1 network.
Note: Next to the USB connector of the gateway, there are also two LED’s visible:
- RED LED: blinks when TOOL4COOL® sends a command to the electronic unit. This must blink every second while TOOL4COOL® is trying to establish a connection with the electronic unit.
- GREEN LED: blinks when the electronic unit responds to a TOOL4COOL® command. The node address of the electronic unit must match the command from TOOL4COOL® (The network setting above tells TOOL4COOL® to search for unit node address 1 every 3 sec.).
Description / Display
| Step | Description / Display |
|---|---|
| 1 | Do not power up the electronic unit at this stage. |
| 2 | Start TOOL4COOL® |
| 3 | In case the network is already connected, disconnect |
it first using on screen network option.
| **
4**| Wait a few seconds, then select Connect Network
(below the File menu).
| **
5| Select the correct port, in this example COM1 is used.| **
6| Cick Configure.| **
7**| Change Last network node address to 1 and change Refresh rate
to 3.
Leave the other settings at their default value and click OK twice.
Now TOOL4COOL® will only look for an electronic unit with address 1, but every 3 seconds. This will ensure that the connection is established within the 15 second time limit after powering up the unit.
Leave all other options unchanged.
| **
8| Power up the electronic unit
9**| The first time the unit is connected, TOOL4COOL® needs to obtain the
parameter file from the unit before a connection is shown by the red arrow.
Allow a few minutes for this task to complete.
You also can read the current status by selecting the network and then select the tab Unit Status.
| ****
10| Look under Error/Message
In this example, no errors or messages appear and the unit is working
properly.
11| If the parameter file was already loaded into TOOL4COOL®, a
connection should be visible in less than 10 seconds.
A red arrow is added before the network name to indicate that a unit is ready.
|
Click the red arrow to open the menu of the electronic unit.
Secop accepts no responsibility for possible errors in catalogs, brochures, and other printed material. Secop reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary to specifications already agreed. All trademarks in this material are the property of the respective companies. Secop and the Secop logotype are trademarks of Secop GmbH. All rights reserved. www.secop.com.