NDR-EA2104 / NDR-EA2208 / NDR-EA2416 User’s manual ver. 1.0
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87
CONNECTING EXTERNAL DEVICES TO ALARM INPUTS/OUTPUTS
Employing TTL alarm outputs:
TTL/CMOS alarm inputs are best implemented in circuits with low current devices, i.e. LEDs, relay
coils. An example of circuit implementing the TTL alarm output is presented below
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