29
DIGITAL INPUT FOR ALARM ACKNOWLEDGMENT
(Terminals 34 & 35)
The Digital Input-1(DI-1) is a potential-free
contact closure input provided for connecting a remote
switch for the purpose of issuing an Alarm Acknowledgment command. An ‘OPEN’ to ‘CLOSE’
change-over of the contacts acts as an Acknowledgment command.
Figure 11.6
34
35
DI - 1
If the Optional plug-in communication board is fitted, connect terminal 7 and 8 of the indicator to (+) and (-) terminals of the
Master device.
For reliable noise free communication, use a pair of twisted wires inside screened cable as shown in Figure 11.5. The wire
should have less than 100 ohms / km nominal DC resistance (Typically 24 AWG or thicker). Connect the terminating resistor
(Typically 100 to 150 ohm) at one end to improve noise immunity.
User Manual
neuro 100EX
