TC-Standard (+)
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 specified
values using direct current voltage. Testing the electric strength with alternating current voltage will damage electronic com-
ponents. The recommended voltage in this case is 2.1 kV DC, 2 s. Disconnect all supply lines from the device before testing. Power
can be supplied via the mains connection.
Plug connection
This device has one EN 175301-803 plug each for the power supply and the signal output. If the lead is connected correctly, these
cannot be confused. Therefore please be sure to correctly reassemble the plugs after connecting the wires. Below you will find
the pin assignments, with the numbers corresponding to those on the plugs:
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
Electric supply S1
115/230 V (24 V DC)
Alarm contact S2 *
Analogue output S3
1 - N/C
2 - N/C
3 - GND
4 - 4-20 mA out
5 - shield
(+24 V)
(-24 V)
*
* When using an alarm contact, connect to ≥ 33 V AC or ≥ 70 V DC PE voltage.
The clamping area is 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 moisture
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) using the M12x1 connector. This plug is located next to the moisture
detector connectors at the top of the cooler.
13
Bühler Technologies GmbH
BE440026 ◦ 12/2020