SIEMENS FHA2054-U1 Audio Transformer Kit Installation Guide
- June 9, 2024
- SIEMENS
Table of Contents
SIEMENS FHA2054-U1 Audio Transformer Kit
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Technical specifications and availability subject to change without notice.
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Issued by: Siemens Industry, Inc. Building Technologies Division 8 Fernwood Road Florham Park, NJ 07932 Tel. +1 973-593-2600 www.sbt.siemens.com/FIS
Edition: 2016-02-26
Document ID: A6V10590197_en–_a© Siemens Industry, Inc., 2015
Description
The FHA2054 audio transformer kit is for a reliable ground disconnection of the low-level audio source in booster amplifier station EBA2001. The FHA2054 audio transformer kit is installed in booster amplifier station EBA2001 and must be connected to ‘Line in’ ‘X4’ at the booster amplifier mainboard (100 W) EBA2004. The FHA2054 comes with all individual parts for installation. The kit contains a shield connection terminal block, an isolating transformer module with connector for the low-level audio connection, a terminating resistor for supervision and a terminal block for the wiring to the low-level input.
Properties
- Ensure solid Earth Ground connection
- Allows for terminal landing of shielded cables
- Uses 1:0.75 audio transformer with low distortion and good frequency response
- DC decoupling, impedance of 10kΩ at 1kHz
- Allows DC wire supervision and ground fault detection of audio source
- Allows 1.00/1.55 Vrms operation
- Harmonic Distortion: <1 %
- Crossover distortion: <1%
You will find more information on booster amplifier mainboard (100 W) EBA2004-A1 in document A6V10407858, e.g. requirements for installation and complete installation instructions.
Installation
Figure 1: Installing the FHA2054 audio transformer kit
- Shield connection terminal block
- The FHA2054 audio transformer kit is mounted on the busbar
- 2x #4-40 pan-head Phillips screws, L ¼”
- Busbar L=100 mm with 2x fastening tabs
- 2x threaded standoffs in back box
- Plug the shield connection terminal block (1) onto the busbar (4) from above.
- Screw the busbar (4) with pre-mounted audio transformer kit (2) and the shield connection terminal block (1) with both screws (3) into the threaded standoff on the back box (5).
Preparing and installing the cable
Preparing the external cable
- Use a twisted, shielded cable.
- Cut open the insulation approximately 90 to 110 mm/3.5″ to 4.3″ from the end of the cable and remove the insulation approximately 20 mm/0.8″ from the cable.
- Strip approximately 30 mm/1.18″ from the end of the cable.
- Open the wire braid of the shielding at the end of the cable and expose the wires.
- Cut off the wire braid of the shielding at the end of the surround corresponding to the ‘cut shield’ in the figure.
Preparing the internal cable
- Use a twisted cable with a max. length of 170 mm/6.7″, shielding is not necessary.
- Strip approximately 30 mm/1.18″ from the ends of both cables.
- Open the wire braid of the shielding and expose the wires.
- Cut off the wire braid of the shielding at the end of the surround corresponding to the ‘cut shield’ in the figure.
Laying the cable and connecting the shield
- Busbar with FHA2054 audio transformer kit mounted
- Exposed shielding in the shield connection terminal block
- External twisted, shielded cable to X41
- PCB of FHA2054 audio transformer kit
- Internal twisted cable
- Booster amplifier mainboard (100 W) EBA2004
- Lay the external shielded cable (3) so that the exposed braid is positioned in the shield connection terminal block (2).
- If necessary, lay a further shielded cable through the same shield connection terminal block.
- Tighten the knurled screws for the shield connection terminal block to fix the cable in place.
- Connect the external cable (3) to the plug terminal X41, in accordance with chapter Wiring and pin assignments [➙ 10].
- Lay the internal cable (5) in accordance with the figure above.
- Connect the internal cable (5) between X42 of the FHA2054 (4) and X4 of the EBA2004 (6), in accordance with chapter Wiring and pin assignments [➙ 10].
Views
| Element | Des. | Function |
|---|---|---|
| Connector | X41 | ‘LINE IN’, ‘Low level’ audio input |
| X42 | ‘LINE OUT’, ‘Low level’ audio output |
Wiring and pin assignments
Figure 6: Wiring the plug connections of the FHA2054 audio transformer kit
- The audio line can be monitored by connecting an EOL resistor of 3.3 kΩ, Siemens part no. C24235-A1-K14. The supervision and the appropriate EOLR value are determined by the ‘External source’.
Settings on the EBA2004
The DIP switch S1601-5 ‘FAULT TBL: LINE’, must be set to OFF. A fault with LED
H401 is not signaled on the booster amplifier mainboard (100 W).
The following DIP switches must be configured, see DIP switch S1501/S1601,
configuration:
- S1501-5 ‘PRIORITY: LINE/SPEAKER’
- S1501-7 and S1501-8 ‘LINE INPUT LEVEL’, recommended 0.75VRMS
You will find detailed information on the configuration and wiring of the EBA2004 in document A6V10407858, Booster Amplifier Mainboard (100W) EBA2004.
Plug connection X41, LINE IN
| Pin | Designation | Description |
|---|---|---|
| 1 | E-R | Connection EOL resistance 3.3 kΩ |
| 2 | IN+ | Low-level audio input + |
| 3 | IN- | Low-level audio input – |
| 4 | E-R | Connection EOL resistance 3.3 kΩ |
Permissible cable cross-section for all plug connections: 1 x 12…18 AWG or 2 x 16…18 AWG Required cable: Shielded and twisted cable; the shielding must be carried out in accordance with chapter Preparing and installing the cable [➙ 7].
Plug connection X42, LINE OUT
| Pin | Designation | Description |
|---|---|---|
| 1 | OUT+ | Isolated low-level audio output + |
| 2 | OUT- | Isolated low-level audio output – |
Permissible cable cross-section for all plug connections: 1 x 12…18 AWG or 2 x 16…18 AWG Required cable: Twisted cable, no shielding required between X42 and X4. The cable must be as short as possible and connected in accordance with chapter Preparing and installing the cable [➙ 7].
Plug connection X4, LINE IN on the EBA2004
| Pin | Designation | Description |
|---|---|---|
| 1 | E-R | EOLR connector not connected |
| 2 | IN+ | Low-level audio input + |
| 3 | IN- | Low-level audio input – |
| 4 | E-R | EOLR connector not connected |
You will find detailed information on the configuration and wiring of the EBA2004 in document A6V10407858, Booster Amplifier Mainboard (100W) EBA2004.
See also
- Preparing and installing the cable [➙ 7]
Recommended wiring for FHA2054
The low-level audio input can1 be used for non-emergency applications such as background music or convenience paging. A wiring example is shown below.
- FACP = Fire alarm control panel
NOTICE
- Nonapplicable for Canadian installations Usage not conform with the National Building Code of Canada
- Note that for Canadian installations, playing Background music in a fire alarm or voice communication system is prohibited, per Section 3.2.4.18 of the National Building Code of Canada.
The inputs of the FHA2054 audio transformer kit cannot be cascaded together as this will degrade the low-level audio input by introducing excessive load on the circuit. If a low-level audio signal needs to be transmitted, one output of the booster amplifier mainboard can be used to send the audio signal to other booster amplifier mainboards through the high-level input as shown in the figure below.
- FACP = Fire alarm control panel You will find more information on parameter limits and a wiring diagram for this application in the document A6V10407858 ‘EBA2004-A1 Booster amplifier mainboard (100 W), Mounting/Installation’.
FCC Statement
WARNING
Installation and usage of equipment is not in accordance with instructions manual Radiation of radio frequency energy Interference to radio communications
- Install and use equipment in accordance with instructions manual.
- Read the following information.
This equipment generates, uses, and can radiate radio frequency energy and if
not installed and used in accordance with the instructions manual, may cause
interference to radio communications.
It has been tested and found to comply with the limits for a Class A computing
device pursuant to Part 15 of FCC Rules, which are designed to provide
reasonable protection against such interference when operated in a commercial
environment. Operation of this equipment in a residential area is likely to
cause interference in which case the user at his own expense will be required
to take whatever measures may be required to correct the interference.
Issued by Siemens Industry, Inc. Building Technologies Division 8 Fernwood Road Florham Park, NJ 07932 +1 973-593-2600 www.sbt.siemens.com/FIS © Siemens Industry, Inc., 2015 Technical specifications and availability subject to change without notice.Document ID: A6V10590197_en–_a Edition: 2016 02-26