ascon M3 Series - Current Transformer Input

34
4 - Operations
CURRENT TRANSFORMER INPUT
Example:
• T/C S,
range 0…1600°C
• Output range, 4…20 mA
• Retransmitted signal PV on
800…1200°C range
With
rt.lo greater than rt.hi
it is possible to obtain a reverse
scale.
20
4
800 1200 1600
#retr = 4=20
#rt.H = p.U
#rt.lo = 800
#rt.Hi =1200
mA
°C
With CT option it is possible to dis-
play the load current and set an
alarm threshold.
It is possible to set AL2 or AL3
(index 8 and 9) to have an alarm
when, during the ON time of the
time proportional output, the load
current is less then the specified
threshold or, during the OFF time,
there is at least 3% of full scale
load current
The alarm condition must be longer
than 120 ms to set the alarm.
During the OFF time the parame-
ter tCur latches the last on time
current value
Example:
CT input on OP1, alarm on AL2 dur-
ing on time (configuration digit N = 8)
ON ON
ON ON
3%
A2s.p
t.Cur
120 ms 120 ms
OFFOP1
AL2 OFF OFF OFF
Load current