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Basic System Components > Fron-end unit

SAM Connectivity

SAM connectivity refers to the system´s preparedness to accept connections to all kinds of safeguard devices--at least to those that may be of public concern. SAM connectivity is available as a separate plug-in module; it is not part of the system‘s standard equipment. However, it is a cheap additional feature.

There are three types of SAM channels:

  • type D is a primitive digital YES or NO input for general alert messaging like fire alarms, etc.
  • type L is a red wire loop input mainly used for structural damage monitoring
  • type A is an analogue input according to the 4-20 mA standard with 12 bit resolution. It is typically used for water pressure transducers and similar sensors

Note that the character of a type D connection is restricted to one bit per device. The system would convey either an idle state or the alarm would be ON.

The L facility is self-contained. Only the wire itself has to be ordered separately.

The type A input is interrogated at specific intervals. The user can use a software menu to specify the polling period and the threshold level over a wide range.

The number of bits to be assigned to the different SAM services is still open.

We are open to YOUR proposals!

 

  5.2.1.1.7  
Another contribution to dialogue@red-systems.com
Robust Emergency Data Link