User manual

3.8 Signal Input/Output, RS232 Interface
The MOBOTIX camera provides a signal input/output as well as two additional sig-
nal input pins and two signal output pins on its RS232 interface. You can use the
camera'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.
3.8.1 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 (0V) 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 al-
ready 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": Current higher than +3V ==> inactive ==> LED off
"1": Current lower than 0.5V ==> active ==> LED on
© MOBOTIX AG • Security-Vision-Systems • Made in Germany
www.mobotix.com • [e-mail]
114/124
D12 Camera Manual Part 1
The signal lines of the se-
rial interface can also be
programmed as additional
signal inputs. Setup
Menu> Event Settings>
Second/Third/Fourth
Signal Input> Signal In-
put 1/2/3. This means
that you can use three ad-
ditional signal input lines
Polarity can be switched
Bridge < 2 kOhms
Integrated low-pass fil-
ter: 10kOhms, 10nF