Identification
7100A User Manual
1-9
1.2.8. ALARMS (Options)
1.2.8.1. Load Monitoring alarms
(Options)
• Serious alarms
Total load failure and thyristor short circuit detection
(
GRF option)
Signalling
Red ‘GRF’ LED and alarm relay contact
• Diagnostic alarm
Partial load failure detection.
(DLF option)
Signalling
Orange ‘GRF’ LED and alarm relay contact.
Settings
Monitoring diagnosis, alarm adjustment and resetting using
push button on front panel.
Sensitivity
Detects the failure of at least one heating element for six
identical elements connected in parallel.
Extension
The DLF option includes the GRF serious alarm monitoring.
• Over-temperature alarm
For fan-cooled units (250 A), the unit cuts out if the
temperature threshold is exceeded.
Signalling
Red ‘T°’ LED if one of the I2, VI or CL alarms or regulation
options is selected.
Alarm relay contact with any one alarm.
1.2.8.2. Overload alarms
(Option)
• Overload alarm
Cut-out if current threshold exceeded
(
ICO Option)
Only available for
Burst Firing (C16 or C64)
with DLF
option (not available with
Short wave infrared
elements,
transformers
and codes VICL and V2CL)
Two alarm thresholds:
instantaneous current and
rms current.
Simultaneous current threshold adjustable
from 20 to 100% using potentiometer on front panel.
Signalling
Red ‘ICO’ LED and alarm relay contact.
Acknowledged by logic input.
1.2.8.3. Alarm relay
Available with one of the Alarm options.
The relay contact (0.25 A/230 Vac; 32 Vdc) is either open on
alarm or closed on alarm depending on the product code.
Eurotherm’s policy of continuous product improvement and development means that the specifications in this document may be modified
without prior notice.