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## Power Supply with Battery Charger BP 50 BMLBS 101 01/_

General
Supplementary Documents
Unpacking
Locations
Installation
Installation of the Battery Case (SDDBS 102 001)
Battery replacement
Installation of battery backup with greater capacity
Installation with an external DC source
Setting the charging voltage
Changing the battery fuse
Replacement of the power supply unit
Alarm connection
Electrical connection
Accessories
Fuse
Batteries

## General

This document covers the installation and replacement of the power supply with battery charger BML BS 101 01/_ and the installation of the battery backup unit.

The power supply unit with battery charger is available in 2 different mains versions:

- for 230 VAC: BMLBS 101 01/1
- for 115 VAC: BMLBS 101 01/2

The power supply unit supplies the exchange cabinet and a battery backup with power at the same time, provided that the total output power (2,1 A on 48V) of the power supply unit is not exceeded.

The power supply unit is mounted within the cabinet BDVBS 101 05.

If initially an exchange with battery backup is ordered, the unit is preconfigured with a power supply with battery charger. The batteries are delivered separately and have to be installed according to this installation instruction.

In order to install the alarm feature, the CPU-D (ROF 157 5118/1) must have revision R1A/A or higher. CPU-D/2 (ROF 157 5118/2) must have revision R1A or higher. The CPU-D4 (ROF 157 5124/_) must have revision R1A or higher.

## Supplementary Documents

- Installation Instruction BP 50 (1531‑BDVBS 101 05 Uen)

## Unpacking

Verify with the ordering list that the delivery is complete. The power supply unit BML BS 101 01/_ can be delivered separately or together with batteries, battery case and the cable set necessary to install a battery pack.

The mains cord is not part of the BMLBS 101 01/_. The mains cord is ordered as an individual item, in order to fit each individual market (RPM 945 3xx, xx=Market version)

Unpack the 4 batteries, the battery case and the power supply unit. Make sure no parts have been damaged or have become loose during transport. Check each battery’s voltage (12.5V - 12.9V) to make sure they are charged and operational.

Check the DC battery cables for insulation breaks before installing. Short circuits can be hazardous and cause fire.

## Locations

A |  | Power switch does not disconnect the unit from mains. This switch only shuts down the unit to standby. |
B, C |  | are screws required for mounting the power supply unit (screw (C) is only for BDVBS 101 01). |
D |  | this is the DC supply cable to the exchange. |
E |  | battery cable connection (reverse polarity protected) |
F |  | alarm cable connection leading to the internal MDF where they are connected to the I/O cable of the CPU-D. |
G |  | fuse: see Changing the battery fuse for replacement. |

## Installation

### Installation of the Battery Case (SDDBS 102 001)

1. If the system is already installed and running, inform the customer that your work is going to stop his exchange for a while.
2. Choose a suitable location for the battery case. Do not mount the battery case above the exchange. Mark the holes on the wall and drill. Fit the holes with wall plugs.

Note

Make sure the battery cabinet is 100% secured to the wall, as the batteries are heavy.

1. Use the battery cable set (NTMBS 101 28) for making the connections in the battery case according to the drawing below. Insert the batteries with the correct polarity according to the markings on the battery case sides. Attach the grey cables to the battery no. 1. Make the (+) connection to the battery no. 2 and put both batteries into the case. Lead the grey cable (-) to the back and connect this cable directly to the battery no. 3 installed above. The gray coloured cables must be led in the shortest possible way on the front and back side.
2. Connect the battery cable to the battery case (4 pole connector refer to drawing above) and put the front cover on the battery case and fasten the screws.
3. With the supplied two screws mount the battery case on the wall. Two holes are provided in the cover to access the screws. Make sure the screws are tightened securely.
4. Remove the front cover from the exchange cabinet. Before switching off the exchange please check that the green LEDs on the extension boards are off (no traffic), then turn off the power switch (A).
5. Remove the DC supply cable (D) to the swivel shelf and unplug the mains cable from the wall outlet and at the bottom of the power supply unit. Then remove the screw (B) at the top and turn the bottom screw (C) two turns counter clockwise (the screw (C) applies only in cabinet BDVBS 101 01). Push up the power supply unit and turn it completely to the right, disengage the unit on the left side wall and pull it out.

1. Install the power supply with battery charger in the reverse procedure as described in position 7 of this chapter. Switch on the power supply. Measure the battery DC voltage on the battery cable connector to verify proper connections.
2. The reading should be within 50 - 54 V for good batteries. To prevent arching never connect the battery unit until the power supply unit has powered up (please observe the power supply has a startup delay of 8 seconds). Connect the battery cable to the power supply unit (E).
3. Connect the power supply alarm cable to the four-pin outlet (F) on the PSU and connect the free ends to an appropriate position on the KRONE connector bar where the I/O cable connection to the alarm input on the CPU-D_ is made. See section 5 for alarm connection.
4. If this is a new installation, start-up the system according to the document t Start of Operation (1537-ASB 150 02 Uen).
5. The battery case is equipped with a fuse. This part has the ERICSSON ordering number NGH 258 03/630. This fuse is required to prevent a short circuit on the supply cables which might cause a fire.
6. Attach label: LZFBS 083 013/3L03 on the bottom of the cabinet. Refer to Installation Instruction (1531‑BDVBS 101 05 Uen).
7. Put the front cover on the cabinet frame.
8. Remove all old excess material and inform the customer that the system is up and running.

### Battery replacement

The batteries (BKCBS 101 01/1) 4 pieces, for the integrated battery pack SDDBS 102 001 have to be ordered separately. If the system is operating on mains, the batteries can be replaced during operation. The objective is to minimise arching of the battery cable plug during plugging and unplugging. This condition is met only during presence of 48 V DC on the power supply unit.

The battery type to be used is a maintenance free lead acid accumulator with a capacity of 2 Ah and a minimum current charging capability of 3 A.

Note

Batteries are a threat to the environment and should be handled with great care.
Used batteries should be taken care of by specialists for recycling. Please contact the supplier in this respect.
Make sure they get them!

### Installation of battery backup with greater capacity

Should a higher battery capacity be necessary, please contact the vendor for details. The battery must be capable of handling a charging current of 3 A. The battery must be of lead acid type.

The external batteries must be installed in a separate housing. As the gases are explosive take care of a good ventilation to the outside to keep vapours from seeping into hazardous areas.

To protect against fire in case of short circuit, install an additional circuit breaker with switch. This is useful to prevent arching on the DC connector (E) of the power supply when removing and inserting the plugs of the battery cable.

### Installation with an external DC source

If there is no mains supply provided, the system can also be run on an external DC source e.g. large utilities. The input voltage range is 44...54 V DC. The installation must provide a circuit breaker (CB) capable of switching currents in excess of 150 A DC.
This is mandatory to prevent hazardous fires.

In this case a separate cable (TSRBS 101 10/2000) is required to connect the DC source. This cable inhibits the lock on discharged batteries. This cable must not be used for larger battery backups.

### Setting the charging voltage

The power supply unit is equipped with a potentiometer to adjust the battery charging voltage.

Note

This potentiometer is factory set.

Any change in the setting may only be done by authorised personnel as it might reduce battery life. The battery (BKCBS 101 01/1) used has a trickle charging voltage of 54.5V DC, so this is the maximum output voltage delivered on the (E) connector. If an external battery with greater capacity should be connected instead, the charging voltage setting must comply with the demands of the battery manufacturer.

### Changing the battery fuse

The battery fuse is accessible from the front of the unit. Replace it only by a fuse with the Ericsson ordering number NGH 258 03/630. Ask your local Support Centre for details.

This fuse meets the requirement of cutting off a DC current in excess of 150 A. This is a mandatory requirement to prevent hazardous fires.

Note

Always disconnect the battery supply cable before changing the fuse.

### Replacement of the power supply unit

1. Switch off the PSU (A) and unplug the mains from the wall outlet. Disconnect the DC supply line to the batteries and unplug the alarm connector on the unit.
2. Disconnect the DC supply cord (D) from the swivel shelf.
3. Unscrew the transport screw (B).
4. Push the PSU from the bottom and turn out the PSU clockwise, unhinge and take it out. Then pull off the mains plug at the bottom of the PSU and disconnect the ground wire.
5. Install the new PSU in the reverse manner.

## Alarm connection

For connection of the ALARM input to indicate that the system is running on battery power, use an Ericsson standard I/O cable or if an MDF is already equipped use a cable with open ends to make the alarm connection.

Should the system be already using some of the system features, (MUSIC input, ALARM output or TEMPERATURE SENSORS), this cable has already been installed.

On the CPU-D, the connection is provided in field 6 CD,EF. On the CPU-D/_, the connections are provided on field 4 EF,GH.

If the connection is to be done directly to the front of the CPU‑D, CPU-D/_ board, use cable e.g. TSR 901 0472/3 (open ends and 6m long) and connect the most positive wire (YELLOW) to pin C14 on CPU-D and pin C22 on CPU-D/_. The most negative (BLUE) is to be connected to pin C16 on CPU-D and to pin C24 on CPU-D/_. Use the connection field 6 on the CPU-D and the connection field 4 on CPU-D/_.

The above figure shows an example for a 2 wire connection for the alarm input and the alarm output connection.

## Electrical connection

The following supply cables are required for a complete installation of an exchange with battery backup:

1. DC power supply cable from the power supply to the exchange.
2. Battery power cable with 6-pin connector and a 4-pin connector. This cable is part of the battery-cable-set NTMBS 101 28
3. Common I/O cable e.g. TSR 901 0472/3 or TSRBS 902 0001/xxxxx
4. 2-pole power supply alarm cable TRE 990 112/3000 or the cable supplied with cable set NTMBS 101 28
5. Mains cord (see Installation Instruction ASB 150 02 (1531‑ASB 150 02 Uen). This cord set must be approved by the local authorities in the country where it is to be used. The plug (type IEC 320 C13) must be right angular for the connection to the power supply unit and moulded to the cord.

## Accessories

### Fuse

Ericsson ordering number NGH 258 03/630.

### Batteries

The batteries for this exchange must comply to:

Ericsson product No.: |  | BKC BS 101 01/1 |
Voltage: |  | 12 V |
Capacity: |  | minimum 2 Ah |
Type: |  | maintenance-free |
Size: |  | L=178 mm H=60 mm W=34 mm |
Weight: |  | approx. 0,93 kg |
Representative types: |  | VARTA CF 12-2,0 Onr. 56 220 706 063 Hitachi HP2-12 |

Revision: F © Ericsson Enterprise 2005