KROHNE OPTISYS SLM 2100, Руководство пользователя, Страница: 35 / 88

ELECTRICAL CONNECTIONS
4
35
OPTISYS SLM 2100
www.krohne.com 01/2017 - 4002737304 - MA OPTISYS SLM 2100 R04 en
4.8.2 Control input (active)
The electrical properties of the 3 control inputs (CI) in detail are the following:
Function of the control inputs Function of the control inputs Function of the control inputs Function of the control inputs
The three active control inputs can trigger different events in the meter from outside. They are
engaged via simple contact closure of an external contact.
The 3 control inputs (CI) have the following functions:
• Control input 1: Rake guard switch or external trigger (selectable via software)
• Control input 2: Rake guard switch or external trigger (selectable via software)
• Control input 3: Maintenance mode
Rake guard switch Rake guard switch Rake guard switch Rake guard switch
To protect the sensor and cable from being damaged or destructed by rakes or other moving
parts, the control input 1 and 2 can be used. For this purpose a NO switch has to be connected to
CI 1 / 2 (Note the switch is not part of the scope of delivery. The additional part has to be
purchased from another manufacturer). In case CI 1 / 2 is set to rake guard switch, the sampling
will be interrupted and the sensor hauled back as soon as the external contact is closed.
External trigger External trigger External trigger External trigger
The function of the external trigger is to trigger the sampling process. For this purpose a NO
switch has to be connected to CI 1 / 2 (Note the switch is not part of the scope of delivery. The
additional part has to be purchased from another manufacturer). In case CI 1 / 2 is set to
external trigger mode the sampling cycle will start as soon as the external contact is closed.
INFORMATION!
The factory default is a disabled control input!
Mode of input Active, not polarity sensitive
Maximal voltage (U
max
) 15 VDC
Voltage out (U
out
) 8 VDC
Current out (I
out
) -10 mA
Voltage low (U
low
) < 2 V
Voltage high ( U
high
) > 4 V
CAUTION!
To avoid damages or destructions, use a limit rake guard switch in all applications where a rake
or other moving devices may come in contact with the sensor or cable! The manufacturer does
not assume any responsibility for damages caused by the absence or malfunction of the rake
guard limit switch.