Installation
7300A user Manual
2-12
2.5.5. Alarm relay contact (alarm option)
If one of the alarm options is fitted, an alarm relay contact is available on the ‘ALR’
terminal block (see figure 2-14).
The type of contact (closed or open on alarm) is determined by the product code.
Contact switching capacity: 0.25 A (maximum 250 Vac or 30 Vdc).
Important!
The type of contact (closed or open on alarm) determines the terminal numbers
in accordance with standard EN 60947-4-3 (as shown on figure 2-11).
Alarm contact
connector
ALR
71 1
a
72
1
b
ANA
31
0
V
A
32
R
I
33 5
V
A
HEAT
alarm relay contact
ON
Contact Type
Code Terminal
number
Closed on alarm
NC 71 and 72
Open on alarm NO 73 and 74
Terminal Labelling
(e.g :
contact closed
on alarm)
Figure 2-14 Typical alarm relay contact connections
