Installation Instructions

PX/QX/RX Version 4.30 Installation Manual – Issue C
- 15 -
The power supply standby capacity specified in PD6662:2004 is shown in the table.
Grade 1 2 3 4
Standby time (hours)
12 12 24 24
The following tables show the maximum available system current with a minimum of 12 hours standby
for each combination of power supply and battery size.
RX16i/QX32i (with 1A PSU)
24 hour battery re-charge time with a minimum 12 hours standby
Battery Size
Maximum recharge
current
System current
maximum
Available backup
period
RX16i/QX32i
current
(example system)
Available Current
(For sensors etc.)
7 Ah 500mA 500mA 14 hours 146mA 354mA
PX48i/PX80i (with 1.5A PSU)
24 hour battery re-charge time with a minimum 12 hours standby
Battery Size
Maximum recharge
current
System current
maximum
Available backup
period
PX48i/PX80i
current
(example system)
Available Current
(For sensors etc.)
7 Ah 750mA 580mA
1
12 hours 155mA 425mA
12 Ah
2
750mA 750mA 16 hours 155mA 595mA
17 Ah 750mA 750mA 22 hours 155mA 595mA
18 Ah 750mA 750mA 24 hours 155mA 595mA
PX500/PX250HS
24 hour battery re-charge time with a minimum 12 hours standby
Battery Size
Maximum recharge
current
System current
maximum
Available backup
period
PX 500 current
(example system)
Available Current
(For sensors etc.)
7 Ah 780mA
580mA
1
12 hours 150mA 430mA
12 Ah 780mA
1A
1
12 hours 150mA 850mA
17 Ah 780mA
1.41A
1
12 hours 150mA 1.26A
18 Ah 780mA 750mA
1
24 hours 160mA 590mA
1
Note that the maximum system current has been de-rated to provide the necessary standby capacity.