Signal Outputs - Buhler TC-Double+X2 Guía Rápida

TC-Double (+) X2
Particularly observe the requirements of EN 60079-14!
WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
WARNING
High voltage
Damage to the device in case of insulation testing
Do not proceed insulation tests with high voltage to the
device as a whole!
Electric strength test
This device is equipped with extensive EMC protection. The
necessary tests were carried out at the factory (test voltage
2.1 kV or 2.55 kV DC depending on approval).
If you wish to check the electric strength again yourself, you
can do so on the entire unit. Only test the device with the spe-
cified values using direct current voltage. Testing the electric
strength with alternating current voltage will damage elec-
tronic components. The recommended voltage in this case is
2.1 kV DC, 2 s. Disconnect all supply lines from the device be-
fore testing. Power can be supplied via the mains connection.
Connection via plug
The device is equipped with connectors according to EN
175301-803 for mains and status output. If the cables are
mounted properly, they cannot be interchanged. Please make
sure that the connectors are remounted correctly after con-
necting the cable. The following figures show the pin assign-
ment with respect to the numbers printed on the connector.
The supply line cross-sections must be suitable for the rated
current. Use a maximum line cross-section of 1.5 mm²
(AWG 16) and a cable diameter of 8 - 10 mm (0.31 - 0.39 inch).
Plug numbering
Alarm contact S2 *
*
* When using an alarm contact, connect to ≥ 33 V AC or
≥ 70 V DC PE voltage.
14 Bühler Technologies GmbH
Electric supply S1
Analogue output S3
1 - N/C
2 - N/C
3 - GND
4 - 4-20 mA out
5 - shield
The clamping areas for S1 and S2 are 8 - 10 mm (0.31 – 0.39
inches) in diameter.

4.4 Signal outputs

The device has various status signals. The maximum switch-
ing 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 / Description
contact type
Re- internal the following
gard- changeover device
ing S2) contact: max. statuses can
250 V AC / be indicated
150 V DC, 2 A, via two
50 VA switching
outputs:
Re- 4-20 mA ana- Signalling of
gard- logue output actual tem-
ing S3) (R <500 Ω) perature in
Load
block 1
(please use
shielded
cables)
The front film on the display module has three LEDs:
Colour Marking
Red S2
Yellow S1
Green OP
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) us-
ing the M12x1 connector. This plug is located next to the mois-
ture detector connectors at the top of the cooler.
The temperature (CH1) which continuously appears in the dis-
play corresponds to the temperature in block 1 (after-cooling).
The analogue temperature signal also corresponds to the
temperature in block 1.
Contact between 3 and 2
closed (alarm)
• No mains voltage
and/or actual tem-
perature outside
the alarm
thresholds
Contact between 3 and 1
closed (ok)
• Mains voltage at-
tached + actual tem-
perature within the
alarm thresholds
With temperature signal
option
T = -20 °C ≙ (-4 °F) ->
Cooler
4 mA/ 2V
T = 5 °C ≙ (41 °F) ->
Cooler
9 mA/ 4,5 V
T = 60 °C ≙ (140 °F) ->
Cooler
20 mA/ 10 V
Function
High/low temperature
Device error
Reserved
Normal operation
BX440022 ◦ 12/2020