Yokogawa DR240 - Manual (Page 44)

2-18 IM DR232-01E
External In/Output Function (alarm module or DI/DO module is required)
Alarm Output
This output can be performed from the internal relay in the alarm module or the DI/DO module.
These relays will be operated when an alarm occurs. For details concerning their settings and their
relation with alarms, refer to page 2-14, 2-15.
Fail Output
One transfer contact in the DI/DO module 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
One transfer contact in the DI/DO module is used for chart end output. 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 inputting up to 12 contact signals to the DI/DO
module. 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
2.6 Other Functions