NEX7250 Zone 2 Annunciator
27
8.1 General
Supply voltage:- 24VDC (19 to 28VDC)
Quiescent supply current 9mA per channel @ 24VDC
ALARM STATE CURRENT
PER CHANNEL
Window size
Small window
Medium window
Large window
Standard systems
20 mA
40 mA
80 mA
Systems with repeat relays
30 mA
50 mA
90 mA
Pushbutton module plus common relays and integral audible alarm
100 mA Extra
8.2 Fuse Details - SPR Module
FUSE FUNCTION
RATING TYPE
PURPOSE
F1
Logic supply
10A/T
20 x 5 mm
Protects the logic supply within the alarm
annunciator
F2
Signal supply
1A/F
Surface mount
Protects the signal supply voltage feed to
the common “C” terminals
8.3 Suitable Power Supplies
The table below indicates the maximum numbers of alarm channels that can be connected to a
standard power supply from the RTK range of products. Each PSU provides a 24VDC output for use
as the logic voltage to the annunciator.
8.4 P725 Annunciator Standard Versions
PSU RATING
@ 24VDC
WINDOW TYPE
CURRENT (A)
SMALL
MEDIUM
LARGE
1.1
34
20
11
1.8
58
34
19
2.5
82
49
27
4.5
151
89
49
6.5
220
130
72
12.5
253
139
8.5 P725 Annunciator Fitted With The Repeat Relays Per Channel Option
PSU RATING
@ 24VDC
WINDOW TYPE
CURRENT (A)
SMALL
MEDIUM
LARGE
1.1
25
17
10
1.8
43
29
17
2.5
61
40
24
4.5
113
74
44
6.5
164
108
64
12.5
210
125
Larger PSU or multiple PSU can be used if required
