Danfoss AM-PBU 25 Operating Guide
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Danfoss AM-PBU 25 is a standby power supply for AME 55 and AME 85 actuators. It will drive the actuators to open or closed position during a power failure. The AM-PBU 25 can power one AMV(E) 85/86 or two AMV(E) 55/56 actuators. It has the following capabilities:
- Connect the VMS25 to the actuator(s) as shown.
- Connect NC1 or NC2 to terminal 3 on an actuator to drive the valve stem down during power failure or to terminal 2 to drive the valve stem up during a power failure.
- Connect AM-PBU 25 to 24 volts ac power.
- Connect the red wire to the battery positive (+) and the black wire to the battery negative (-).
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Instructions AM-PBU 25
Description
AM-PBU 25 is a standby power supply for AME 55 and AME 85 actuators. It will drive the actuators to open or closed position during a power failure. The AM-PBU 25 can power one AMV(E) 85/86 or two AMV(E) 55/56 actuators.
Installation
1. Connect the VMS25 to the actuator(s) as shown.
Connect NC1 or NC2 to terminal 3 on an actuator to drive the valve stem down during power failure or to terminal 2 to drive the valve stem up during a power failure.
2. Connect AM-PBU 25 to 24 volts ac power.
3. Connect the red wire to the battery positive (+) and the black wire to the battery negative (-).
Note: Connect the 24 volt power to the AM-PBU 25 before connecting the battery. Connecting the battery fi rst causes the AM-PBU 25 to go into the power failure mode.
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7369082-0 SIBC 06 / 04 VI.AE.P1.02
L
LN
BT
24 Vac power
System neutral
Battery Test
RC
TG
C1
Remote Control
Test Ground
Common, Output 1
NC1 Normally Closed, Output 1
NC2 Normally Open, Output 1
AC
C2
24 Vac output
Common, Output 2
NC2 Normally Closed, Output 2
NO2 Normally Open, Output 2
1 (2)
Testing the AM-PBU 25 and the battery
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 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 of the battery.
Connecting terminals TG (-) and BT (+) to a BAS or volt meter and taking a reading just after an exercise cycle, gives a good indication of battery condition. At the end of the cycle (6.5 minutes), the battery should not be below 10 V.
When the connection between LN & RC is restored the AM-PBU 25 will charge the battery with 13 - 14 volts dc wich can be verifi ed on terminals
TG & BT.
AM-PBU 25
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AM-PBU 25
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AM-PBU 25
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AM-PBU 25
2(2)
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