AMG Systems Ltd. reserves the right to make changes to this
document without notice. The information herein is believed to
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Page 7 of 8
AMG5918 Instruction Sheet D22155-
00.doc
be accessed by removing the 2 fixing screws in the rear panel and sliding the PCB out of the
enclosure.
For clarity, in the 3 examples shown below all 4 data ports D1-D4 are terminated the same, but each
data channel may be configured & terminated independently as required. The 3 examples shown are
RS-232 (no termination), RS-422 (120Ω) or RS-485 (120Ω).
Alarm Channel Configuration
The
AMG5918
provides 4 bi-directional contact closure inputs / alarm outputs. Each ALARM IN input
is via an internal 10kΩ series resistor with a 47kΩ pull-up resistor to the in3V3 supply.
Each ALARM OUT output can receive an on/off signal from an
AMG5917
and is typically used to
convey contact closure status. Each alarm output is NPN open collector, maximum load 500mA /
24Vdc.
