User manual

3.7 Signal Input/Output, RS232 Interface
The MOBOTIX M12, D12 and V12 models provide one signal input and one signal
output as well as two additional signal input pins and two signal output pins on
its RS232 interface (only available in IT and Secure models). You can use the cam-
era's signal input/output to detect an opening door (using a Reed switch) or to
switch an external device (e.g. a lamp using a relay). The signal input/output pins
of the RS232 interface can be used for attaching additional sensors and devices.
3.7.1 Signal Input Pins
Pin 9 of the D Sub 15 HD connector is used for detecting the signal input. To trigger
the signal input, simply connect pin 5 (ground) to pin 9 (no current required). You
can also connect other devices (e.g. SPS machines) that close a contact (0V) to trig-
ger the signal input.
Click on Setup Menu> Event Settings to specify, which state of the signal input
should create an event -an open loop or a closed loop. For example, if you would
like to secure all windows and doors of a building, connect all closed switches in a
serial loop and connect the wires to signal input (pin9) and ground (pin5). The
loop should have a resistance of less than 2kOhms. This pin of the camera is
already equipped with a low pass filter (10kOhms/10nF).
Open Setup Menu> Event Settings to activate the additional signal input pins of
the RS232 interface (
Closed/Low or Open/High option; CTS: pins 8-5, RxD: pins 2-
5). Open Admin Menu> Setup of serial interface and modem and configure the
serial interface accordingly (Serial:
Data , Mode: I/O Mode ).
Click on Admin Menu> LED Setup and set one or more LEDs to
Signal input to dis-
play the state of the input signal for testing (
Signal input option: loop closed = LED
on).
“0”: Voltage higher than +3V ==> inactive ==> LED off
“1”: Voltage lower than 0.5V ==> active ==> LED on
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D12 Camera Manual Part 1
The signal lines of the
serial interface can also
be programmed as addi-
tional signal inputs. Setup
Menu> Event Settings>
Second/Third/Fourth
Signal Input> Signal
Input 1/2/3. This means
that you can use three
additional signal input
lines
Polarity can be switched
Bridge < 2 kOhms
Integrated low-pass fil-
ter: 10kOhms, 10nF