PT 200M, Быстрый старт

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Quick Start Manual Rev 1.0
003R-620-100
Page 11
6.4.4. Remote Input
•
The indicator requires a voltage free contact between TXD
and RXD to enable the remote input (ie. SPEC:REM.FN).
Note: The remote input will not function when in setup or
when using the opto-LINK.
WARNING
The remote input is a
voltage free contact (eg.
button, mechanical
relay). Connection of
any active circuitry may
damage the instrument.
6.4.5. Outputs
•
Output drivers for the instrument are isolated open emitter
transistor drives that are capable of driving up to a total of
300mA.
•
This configuration allows for the direct connection of the
instrument outputs to most types of PLC.
•
The voltage applied to the COM terminal appears on the
output lines (ie. OUT1 and OUT2) when the outputs are
active (eg. to connect to a PLC c24V to the common
terminal). The outputs can then be connected directly to
PLC inputs so when the outputs are active the PLC will see a
24V signal.
•
To drive external loads (eg. relays), connect the relay coil
positive supply to the output common and the output line
directly to one side of the relay coil.
•
Connect the other end of the relay coil to the negative supply.
It is recommended that fly-back diodes or transient
suppressors be fitted across relay coils to limit switching
noise.