Bühler technologies TC-MIDI Notice De Montage page 14

TC-MIDI (+)
Plug numbering
Alarm contact S2 *
*
* When using an alarm contact, connect to ≥ 33 V AC or
≥ 70 V DC PE voltage.
The clamping areas for S1 and S2 are 8 - 10 mm (0.31 – 0.39
inches) in diameter.
4.4 Signal outputs
The device provides different status signals. The maximum
switching load of the alarm outputs is limited to
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 of the cooler is outside the specified limits.
It does not indicate if the alarm was triggered due to excess
temperature or insufficient temperature.
The front film has three LEDs:
Colour Marking Function
Red S2 High/low temperature, device error
Yellow S1 ---
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.
When the moisture detector (optional) is installed, an alarm is
activated by the alarm contact/status output (S2) if the mois-
ture is still present in the prepared sample gas. Thereby, no
distinction is made between the alarm/cable break triggered
by moisture detector 1 or 2. This information is displayed by
an error message instead.
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.
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
Description of signal outputs
Function / Description
contact type
Re- internal the following
gard- changeover device
ing S2) contact: statuses can
max. be indicated
250 V AC / via two
150 V DC, 2 A, switching out-
50 VA puts:
Re- 4-20 mA Signalling of
gard- analogue actual tem-
ing S3) output perature
(R <500 Ω) (please use
Load
shielded
cables)
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
After switching on the cooler the block temperature will be
displayed. The display will flash until the block temperature
has reached the preset target value (± adjustable alarm
range). The status contact is in the Alarm position.
Once the target temperature range has been reached, the
temperature will continuously be displayed and the status
contact switches over.
If the display flashes during operation or an error message ap-
pears, please refer to bullet "Troubleshooting".
Please refer to the data sheet for performance data and max-
imum ratings.
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 moisture detector
option
Contact between 3 and 2
closed (alarm)
• The moisture de-
tector registers re-
sidual humidity in
the sample gas or
cable break: Error
message
Contact between 1 and 3
closed (ok)
• no residual mois-
ture in measuring
gas / no cable break
With temperature signal
option
T = -20 °C ≙ (-4 °F) ->
Cooler
4 mA/ 2 V
T = 5 °C ≙ (41 °F) ->
Cooler
9 mA/ 4,5 V
T = 60 °C ≙ (140 °F) ->
Cooler
20 mA/ 10 V
BX440025 ◦ 12/2020