Yokogawa DR240 - Manual (Page 40)

Functions
2-19 IM DR231-01E
2
External Input/Output Function (Option)
Alarm Output
When /A4 option is installed ten external output relays (make contact) can be used, whereas with
/R1 option is installed, two external output relays (transfer contact) can be used. These relays will
be operated when an alarm occurs. For details concerning their settings and their relation with
alarms, refer to page 2-15, 2-16.
Fail Output
When /R1 option is installed, one external output relay (transfer contact) is used for fail output.
This relay will change to the de-energized status when a failure of the recorder occurs.
NO C NC NO C NC NO C NC
Usually In case of failure In case of power OFF
Chart End Output
When /R1 option is installed, one external output relay (transfer contact) is used for chart end
outout. When the chart has only 2cm or less paper, the “CHART” indicator at the right of the
display will light, and recording will stop. The relay will change to the energized status.
NO C NC NO C NC NO C NC
Usually In case of Chart end In case of power OFF
Controlling Recording Functions by Remote Control
The recording functions can be controlled by the input of up to 12 contact signals when /R1
option is installed. You can choose one of the following operations for each of the 12 signals. The
remote control function can be one of the events of the event/action function described on the
previous page.
• Alarm acknowledge
• Alarm reset
• Timer reset
• Recording start/stop
• Manual printout
• Digital printout
• Message printout
• Message display
• Change of chart speed/recording interval
• Group trend recording
• Starting/stopping/clearing/resetting computation
• Saving/reading measured/computed data, reading set-up data
Communication Interface (Option)
Either the GP-IB interface, RS-232-C interface, RS-422-A/RS-485 interface, or ethernet is
available as an option and should be specified at the time of ordering. For details regarding
operation and commands, refer to IMDR231-11E.
Internal Illumination (Option)
Clear internal illumination for easy distinction of traces is available as an option. Internal
illumination will be provided when the power is turned ON.
2.6 Other Functions