110
SC-F70
SC-F70
PID Operation Operating Instructions
9.6 Alarm Output
(1) Number of alarm points:
4 points maximum
*The number of alarm points
decreases, if the control output is a
relay output.
(2) Alarm types:
Alarm suppressed, measurement upper limit, measurement
lower limit, deviation upper limit, deviation lower limit,
deviation upper/lower limits, within deviation range,
measurement upper limit with standby, measurement lower
limit with standby, deviation upper limit with standby,
deviation lower limit with standby, deviation upper/lower
limit with standby, input error, FAIL status
Note: Selectable with alarm settings
(3) Setting range
1. Measurement alarms:
Same as measurement input range
2. Deviation alarms:
0 to measurement span or 0 to 9999
Note: Unit/decimal point position is the same as for measurement
input.
(4) Operation hysteresis:
0 to 10% of measurement span
(5) Alarm timer:
0 to 600 seconds for each alarm
(6) Exciting/Non-exciting:
Selectable
Note: The FAIL alarm acts on non-exciting settings only, opening the
relay contact in FAIL status and closing it in normal status.
(7) Output
1. Relay contact output:
1a contact
(1c contact for AL3 output)
2. Rating
1) AL1 and AL2:
AC 250 volts, 1 ampere with resistanceload
2) AL3 and AL4:
AC 250 volts, 3 amperes with resistance load
3. Electrical service life
1) AL1 and AL2:
50,000 times minimum under rated load
2) AL3 and AL4:
300,000 times minimum under rated load
(8) Alarm display:
Red surface-emitting LED (AL1 to
AL4)