Circutor DHB-402, Instruction Manual

Page: 14 / 60

4�6�- ALARMS
The
DHB-402
unit has:

2 alarm relays,
Alarm 1
and
2
, terminals 9, 10, 11, and 12 of
Table 2
, with normally open (NO)
contact.

2 alarms,
Alarm 3
and
4
, fully programmable but not linked to any relay.
The
DHB-424
model has:

2 alarm relays, Alarm 1 and 2 , terminals 9, 10, 11, and 12 of
Table 2
, with normally open (NO)
contact.

2 switched alarm relays,
Alarm 3 and 4,
terminals 31, 32, 33, 34, 35, and 36 of
Table 3
.
Each of the alarms can operate in the following work modes (
Figure 9
):

n-on
: the alarm is activated when the average value exceeds the upper value
PrH
and does
not deactivate until it is below the lower value PrL .

n-off:
the alarm is deactivated when the average value exceeds the upper value
PrH
and
does not activate until it is below the lower value PrL .

on : the alarm is activated when the average value exceeds the lower value PrL and does not
deactivate until it is above the upper value
PrH
.

off: the alarm is deactivated when the average value exceeds the lower value PrL and does
not activate until it is above the upper value
PrH
.

h-on
: This option is always enabled for manual simulation.

h-off
: This option is always disabled for manual simulation.
14
DHB-402 DHB-424
Instruction Manual