Bühler technologies RC 1 Serie Notice De Montage page 15

RC 1.x
Insulation test
The device is equipped with extensive EMC protection. If insu-
lation tests are carried out the electronic filter devices will be
damaged. All necessary tests have been carried out for all con-
cerned groups of components at the factory (test voltage 1 kV
or 1.5 kV respectively, depending on the device).
If you wish to carry out the insulation test by yourself, please
test only separate groups of components.
Disconnect the compressor, the fan, the heating or the peri-
staltic pumps, respectively, and then carry out the insulation
tests.
Plug connection
This device has one EN 175301-803 plug each for the power
supply and the signal output. If the lead is connected cor-
rectly, these cannot be confused. Therefore please be sure to
correctly reassemble the plugs after connecting the wires. Be-
low you will find the pin assignments, with the numbers cor-
responding 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).
Shielded signal lines are required to connect the analog out-
put or the digital interface.
Plug numbering
Alarm contact S2 *
*
Digital output S4
1 - not used
2 - RS485 A
3 - GND/Common
4 - RS485 B
5 - Shielding
Fig. 1: Cooler connection
* When using an alarm contact connect to ≥ 33 V AC or
≥ 70 V DC PE voltage.
The clamping area has a diameter of 8-10 mm.
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.
BX450028 ◦ 03/2024
Electric supply S1
Analogue output S3
1 - N/C
2 - N/C
3 - GND
4 - 4-20 mA out
5 - shield
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.
Description of signal outputs
Function/ Description
contact
type
Regard- internal the following
ing S2) changeov device statuses
er con- can be indic-
tact: max. ated via two
250 VAC/ switching out-
150 VDC, puts:
2 A, 50 VA
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 detector
registers residual hu-
midity in the sample
gas or cable break: Er-
ror message
Contact between 1 and 3
closed (OK)
• no residual moisture
in measuring gas/no
cable break
Bühler Technologies GmbH 15