Danfoss | AM-PBU 25 | Datasheet | Danfoss AM-PBU 25 Datasheet

Data sheet
AM-PBU 25 Electronic Power
Backup for 24 Vac Actuators
Descriptions
AM-PBU 25 is a standby mains power backup unit
for AMV(E) 85, 86 or AMV(E) 55, 56 actuators. It is
used as an “Electronic Spring Return” unit. During
a power failure an actuator can be powered to
its open or closed position. Normal control of
the actuator automatically resumes when power
returns. The charger section of the AM-PBU 25
keeps the battery in peak condition at all times.
The battery can be monitored remotely from
a building management system (BMS) or volt
meter.
The AM-PBU 25 can serve one AMV(E) 85/86
actuator or two AMV(E) 55/56 actuators.
Ordering
Technical data
Type
Description
Code No.
AM-PBU 25
Power backup unit
082H7090
Power requirement
Power output
Output cycle time
Battery
Ambient temperature
minutes
24 /40
24/25, 2 spdt contacts
5.4
V, Ah
12, 1.2
°C
0 … 40
Ambient humidity
max. 65 % RH
Enclosure rating
IP 00
Standards
Emission - EN 50081-1
Immunity - EN 50082-1
Damp heat test - IEC 68-2-2
Weight
Dimensions (mm)
Operation
Vac/VA
kg
mm
1.1
190 x 127 x 50 - panel mounted
During normal operation 24 Vac power passes
through normally open relay contacts in the
AM-PBU 25 to the power input terminals on the
actuators. In the event of a power failure the
AM-PBU 25 starts to provide 24Vac power to the
actuator from the frequency converter.
This drives the valve either open or closed
depending on the wiring of the actuator.
Disposal
The product must be dismantled and the
elements sorted into various material groups
before disposal.
DEN-SMT/SI
VD.AE.O2.02 © Danfoss 05/2014
The power backup cycle lasts for 5.4 minutes.
Normal operation is resumed when power is
restored.
The condition of the battery can be monitored
with terminals TG and BT connected to a volt
meter or Building Management System (BMS).
1
Data sheet
AM-PBU 25 Electronic Power Backup for 24 Vac Actuators
Wiring
L
LN
BT
RC
TG
C1
NC1
NO1
AC
C2
NC2
NO2
24 Vac power
System neutral
Battery Test
Remote Control
Test Ground
Common, Output 1
Normally Closed, Output 1
Normally Open, Output 1
24 Vac output
Common, Output 2
Normally Closed, Output 2
Normally Open, Output 2
The jumper between LN & RC can be replaced by
a connection to a building management system
(BMS), a controller, or a manual switch. When
the contact opens, the building mains power is
disconnected and the
AM-PBU 25 goes through a cycle, running on
battery power. This feature can be used for
remote control of the valve or for testing the
battery. Connecting terminals TG and BT to a
BMS or volt meter and taking a reading during an
exercise cycle, gives a good indication of battery
condition.
2
VD.AE.O2.02
Connecting NC1 or NC2 to terminal 3 on the
actuator drives the valve stem down on power
failure; connecting NC1 or NC2 to terminal 2
drives the valve stem up on power failure.
Produced by Danfoss A/S © 05/2014

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