Ix
HIMatrix AI
max. 10 V
Diode
R
12 V
26.4 V
Actuator
Field terminal
Field terminal
Shunt
R
Series
R
area for monitoring of line break and short-circuit
protective circuit in case of short-circuit
Figure 5: Example for line break and short-circuit monitoring of digital outputs (actuator circuit)
In chapter "Line Monitoring" at HIMatrix F35 you will find an example for monitoring of line
break and short-circuit of actors via analog inputs.
Visual display systems, indicator light panels, LED displays, alphanumeric displays, audible
alarms, etc. can all be controlled using an appropriate application program.
The routing of fault signals via input and output modules or to routing equipment must be
carried out using the de-energize to trip mode.
Fire alarms can be transmitted from one HIMatrix system to another using the Ethernet
communications (OPC) standard available. Any breakdown in communications must be sig-
naled.
HIMatrix systems that are used as central fire alarm systems must have a redundant power
supply. Precautions must also be taken against the power supply failing, i.e. using a battery-
powered horn. There must be no interruption in operation when switching between the mains
supply and the back-up supply. Voltage dips of up to 10 ms are permitted.
When there is a fault in the system, the system signals specified in the application program
are written by the operating system. This enables error signaling to be programmed to signal
errors detected by the system. In the event of an error, safety-related inputs and outputs are
switched off, i.e. 0-signals are applied to all the channels of faulty inputs and all the channels
of faulty outputs are switched off.
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