Pin Assignment; Signal Output; Description Of Functions - Bühler technologies EGK 1 Ex2 Notice De Montage

EGK 1 Ex2

Pin assignment

Alarm contact S2
The clamping area has a diameter of 8-10 mm (0.31-0.39 in).

4.4 Signal Output

The device has a status signal (also see table "Signal Output
Description"). The maximum switching power of the alarm
outputs is 250 VAC/150 VDC, 2 A, 50 VA, each.
The alarm contact/status output (S2) will trigger an alarm if
the cooler temperature is outside the set limits. It does not in-
dicate if the alarm was triggered due to high or low temperat-
ure.
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 alarm
contact S2.
Signal Output Description
Function / Description
contact
type
Re- internal the following
gard- changeover device
ing S2) contact: statuses can
max. be indicated
250 VAC/15 via two
0 VDC, 2 A, switching
50 VA outputs:
12 Bühler Technologies GmbH
Power supply S1
115/230 V
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
4.5 Testing Electric Strength
The controller electronics of the unit have a number of EMC
safeguards. Testing the electric strength damages electronic
filter components. The necessary tests of all assemblies re-
quired to be tested were carried out at the factory (test
voltage >=1.5 kV AC).
When retesting the electric strength yourself, disconnect the
earth conductor from the controller electronics during the test
and short-circuit L and N.
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.

5.1 Description of functions

The cooler is controlled by a microprocessor. With the factory
preset the control already incorporates the various character-
istics of the built-in heat exchangers.
The programmable display shows the block temperature in
the selected display unit (°C / °F) (factory preset °C). Applica-
tion-specific settings can easily be configured guided by the
menu, using the 5 buttons. For one, this applies to the target
outlet dew point, which can be set from 3 to 20 °C (factory pre-
set 5 °C).
And then the warning thresholds can be adjusted for low and
excess temperature. These are set relative to the outlet dew
point τ setting.
a
For the low temperature the range is τ
minimum cooling block temperature 1 °C), and the range for
the high temperature is τ +1 to +7 K. The factory setting for
a
both is 3 K.
The flashing display and the status relays indicate the condi-
tions are below or above the configured warning range (e.g.
after switching on).
The separated condensate can be drained via connected peri-
staltic pumps or add-on automatic condensate drains.
Fine mesh filters can also be used, which in turn can be in-
stalled in optional moisture detectors.
The glass dome allows the dirt level of the filter element to
easily be determined.
-1 to - 3 K (however
a
BX450022 ◦ 12/2018