AMI Analyzer Manual
Installation and Operation
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6
excessive noise and RFI interference.
Interconnections:
Figure 2. Back panel of the 201LC.
Alarm connections:
The alarm connections are single pole double throw relays, i.e. Form C contacts. They are normally preset to operate
as high alarms, failsafe, with no alarm delay, though they can be supplied with other settings. By failsafe is meant that
the relays are powered when NOT in alarm, so that if power fails, they indicate an alarm condition. The contacts can
handle AC or DC voltages, and can carry up to 5A of current for a resistive load. Inductive loads such as solenoid
valves should be “snubbed” – we suggest that you connect diodes or Zener diodes or “Transzorbs” directly across them
to absorb the inductive spike. Do not connect them across the relay terminals on the analyzer, since the resultant
current loop will transmit a lot of RFI that could upset sensitive devices nearby.
Output connections:
This unit is equipped with an isolated 4-20mA output. It is capable of driving a 600 Ohm load and will saturate at
more than 125% of the nominal full scale range.
Serial connections:
No serial connection is provided on this analyzer.
