Bühler technologies TC-Double Plus, Инструкция по установке и эксплуатации, Страница: 15 / 49

TC-Double (+)
4.4 Signal outputs
The device has various status signals. The maximum switching power of the alarm outputs is 250 V AC/150 V DC, 2 A, 50 VA,
each.
An alarm is triggered by the alarm contact/status output (S2) if the temperature in block 1 is outside the specified limits. It does
not indicate if the alarm was triggered due to excess temperature or insufficient temperature.
Description of signal outputs
Function/contact type Description
Regard-
ing S2) internal changeover con-
tact: max. 250 V AC/150 V
DC, 2 A, 50 VA the following device statuses
can be indicated via two
switching outputs: Contact between 3 and 2 closed (alarm)
– No mains voltage and/or actual temperature outside
the alarm thresholds
Contact between 3 and 1 closed (OK)
– Mains voltage at actual temperature within the
alarm thresholds
With temperature signal option
Regard-
ing S3) 4-20 mA analog output
(R
Load
<500 Ω)
Signalling of actual temper-
ature in block 1 T
cooler
= -20 °C
≙
(-4 °F) -> 4 mA/ 2V
T
cooler
= 5 °C
≙
(41 °F) -> 9 mA/ 4.5 V
T
cooler
= 60 °C ≙ (140 °F) -> 20 mA/ 10 V
Regard-
ing S4) Digital output Modbus RTU (RS-485) Interface default values
Baudrate – parity – stop bit:
19200 – Even – 1
Default ID: 10
The bus lines are not internally terminated.
The front film on the display module has three LEDs:
Colour Marking Function
Red S2 High/low temperature
Device error
Yellow S1 Reserved
Green OP Normal operation
The LEDs OP and S2 indicate the device status similar to S2.
If the option “temperature signal” is built in, the unit has a signal output via the analogue output to indicate the actual cooler
temperature.
The temperature signal can be read via the panel plug (S3) using the M12x1 connector. This plug is located next to the moisture
detector connectors at the top of the cooler.
The temperature (CH1) which continuously appears in the display corresponds to the temperature in block 1 (after-cooling). The
analogue temperature signal also corresponds to the temperature in block 1.
13 Bühler Technologies GmbH BE440021 ◦ 09/2021