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I15007_en_02
3.3.3
Connecting service contacts
NOTE: Do not connect the voltage and ground outputs to an external source.
The plug-in screw terminal blocks of the service contacts may be removed or inserted dur-
ing operation of the mGuard.
The mGuard rs4000/rs2000 3G has three digital inputs and outputs. These are configured
in the web interface, e.g., the starting and stopping of VPN, sending alarms via SMS etc..
The digital inputs and outputs are connected as follows.
X2
US I2 GND O2
US I1 GND O1
Figure 3-4
Service contacts
Control switch CMD
US
Voltage output (+)
Supply voltage
Example
A push button or an on/off switch (e.g., key switch) can be connected between service
contacts US and I.
The service contacts O1–O3 are non-floating, continuously short-circuit-proof and supply
a maximum of 250 mA.
The switching inputs and switching outputs can be connected with signals from external de-
vices, e.g., with PLC signals. In this case, ensure the same potential as well as voltage and
current specifications are defined.
Depending on the firmware version used, the service contacts can be used for various
switching or signaling tasks.
X3
US I3 GND O3
X1
I1, I2, I3
Switching input
Ground output (-)
11 ... 36 V DC
Supply voltage
Example
mGuard rs4000/rs2000 3G
Signal output (digital) ACK
GND
O1, O2, O3
Short-circuit-proof
switch output,
maximum 250 mA
at 11 ... 36 V DC
Innominate Security Technologies
57
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