Scantronic 808 Installationshandbuch PDF herunterladen (Seite 18)

…always there

Pin Alarm Polarity

The pin alarm channels respond to the voltage level at the terminal block inputs

(stand-alone mode) or the pins of SK1 and SK2 (plug-in mode). The appropriate

terminal block inputs and plug-in connector socket pins are tracked together in

parallel on the circuit board. Each channel can be programmed to be "Positive

Applied" or "Positive Removed". This polarity is set in the NVM.

PROGRAMMING THE NVM

For 11zstu, the NVM programming does not affect the functions of alarm

channels 9, 10, 11 and AC Fail. The extra alarm inputs are configured by DIP

switches on the expansion board. All unused alarm inputs must be disabled. For

all enabled alarm inputs, the correct polarity must be selected. Alarm inputs 9,

10 11 and AC Fail cannot be selected as opening/closing channels.

Switches at SW1 are used to enable or disable and to select the polarity of the

extra alarm inputs. The function of each switch is indicated in the table below.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 32 33

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Scantronic 808 Installationshandbuch Seite 18