8
AMPS-24 Manual —
P/N 51907:J2 02/26/2014
Introduction
Specifications
Charging current:
1.0A, 2.0A, 5.0A, or OFF (Software selectable)
Based on battery size programming (See “Outputs Current Settings” on page 35)
Charging voltage:
27.6 VDC (nominal)
To calculate expected standby operating times, see Section 4 on page 41.
When AC power is lost, the deeply-discharged battery cutoff protection will be invoked at 17 volts.
The power supply will be disconnected from the batteries. The power supply’s normal operation
will be restored when AC power returns.
1.2.2 AMPS-K2 Board
Main 24V Output Circuit - TB1
Main 24V output provides filtered power-limited (Class 2) power when set for 3A. Otherwise it
provides filtered, non-power limited power. Refer to Table 1.1 below for maximum current settings
for the various configurations.
Aux 24V Output Circuit - TB3
Auxiliary 24V output provides filtered power-limited (Class 2) power when set for less than
5A.Otherwise, it provides filtered, non-power limited power. Refer to Table 1.1 below for
maximum current settings for the various configurations.
SLC Circuit - TB2
Average SLC current is 1.0 mA. The maximum resistance of the SLC wiring from any device to the
FACP should not exceed 50 ohms.
Utilizes wire sizes 12-18 AWG (3.31 mm
2
- 0.821 mm
2
).
Trouble Bus - TB4
Trouble bus input is designed to receive trouble signals from any normally-open dry contacts or
open-collector circuit.
Utilizes twisted-pair wire sizes 12-22 AWG (3.31 mm
2
- 0.326 mm
2
).
Full Speed USB 2.0 - J3
USB Type B connector for programming installation parameters.
Charger
Setting/Battery Size
Main 24V (TB1 on
AMPS-K2 board)
Maximum Current
Total AUX 24V (TB3 on
AMPS-K2 board plus
TB2 on CPS-24)
Maximum Current
1A / 7 - 26AH Batteries
5A
3A
2A / 12 - 60AH Batteries
5A
3A
5A / 55 - 200 AH
Configuration 1
5A
OFF
Configuration 2
3 A
1 A
Disabled
5A
5A
Table 1.1 Output Current for Each Configuration
NOTE:
The AMPS-24 can provide up to 3A for releasing applications, limited
by the FCM-1-REL.
