Bühler technologies Modbus RTU TC-MINI Notice De Montage page 8

TC-MINI
Inputs/out- Ter- Function
puts minal
Moisture de- X1.1 FF.1 (white)
tector
X1.2 FF.2 (brown)
X1.3 FE:
Status X2.1 Status NC
(Alarm)
X2.2 Status COM
X2.3 Status NO
(ok)
24 V input X2.4 24 V DC -
X2.5 24 V DC +
Analog out-
X2.6 FE:
put
X2.7 mA +
X2.8 mA -
Digital out- X2.6 FE:
put
X2.7 Signal A
X2.8 Signal B
24 V output * X2.9 24 V DC -
X2.10 24 V DC +
* Add-on units, e.g. a pump, with 24 V supply can be connec-
ted to the output, switched via the status output. The 24 V
supply must then be configured appropriately (see data
sheet).
4.4 Settings
DIP switch
The unit is configured using four DIP switches at the front of
the cooler.
1 ON switch
SW1 0 1
0 OFF switch
SW2 0 1
0 1
SW3
S Switch, the following numbering of the SWs
0 1
SW4
W corresponds with the numbering on the DIP
switch.
SW1 / SW2 SW2 SW1 Gas output dew point
0 0 3 °C
0 1 5 °C (factory setting)
1 0 10 °C
1 1 15 °C
SW3 / SW4 SW3 SW4 Delta-T control/digital interface
0 0 Gas output dew point, fixed
0 1 Difference from ambient temperat-
ure approx. 15 °C
1 0 Difference from ambient temperat-
ure approx. 30 °C
1 1 Modbus option active (only with op-
tional Modbus RTU digital output)
8 Bühler Technologies GmbH
Description
Moisture detector
Shield for moisture de-
tector inlet
Alarm/Status
Changeover contact, po-
tential-free,
Ratings see technical
data
Power supply
Shield for analog output
Analog output
4...20 mA, 0 - 80 °C
Shield for digital output
Communication line for
digital interface
Supply for optional add-
on units
maximum current, see
technical data
Using the Modbus RTU option
On devices with Modbus option, the DIP switches are set so
the digital interface is active. With the interface active, it's im-
portant the switch settings SW1 and SW2 are not relevant for
the cooler function. In this case, the cooler uses the values in
the registers.
When disabling the digital interface with the DIP switch, the
settings apply based on the DIP switches again. The Modbus
registers will not be overwritten.
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
After switching on the supply voltage the cooler starts to cool
the cooling block. When switched off the contact between X2.1
and X2.2 is closed.
The target temperature is factory preset to 5 °C. The alarm
limit is defined at +5/-2 K.
(Note deviating defaults with Modbus option enabled, see
Modbus register table).
5.1 Status Signal via LEDs and Status Relay
LED LED Statu Con-
green red s dition
in-
ternal
OFF OFF X2.1,
X2.2
ON OFF X2.1, OK
X2.3
OFF Flash- X2.1, OK
ing X2.2
f = 1
Hz
OFF ON X2.1, OK
X2.2
OFF Flash- X2.1, Error
ing X2.2
f = 5
Hz
OK No error
Error Error present
xxx Status not defined
f =... LED flash frequency
X2.1, Markings on terminals
X2.2...
(*) Also applies if no moisture detector connected
If the red LED lights up during operation, please refer to
chapter "".Troubleshooting".
FF Temper- Description
ature
Unit off With the cooler
switched off, the
status output
corresponds error
status.
OK (*) OK Normal opera-
tion
OK (*) Error Overload / tem-
perature outside
the target range
Error xxx Moisture penet-
ration
xxx xxx Various possible
causes, contact
Service.
BX440015 ◦ 05/2021