FSR BMS-1032 - Manual (Page 9)

FSR
Installation and Operating Manual Background Music System (BMS 1032)
www.fsrinc.com 5-1
GROUNDING
It is strongly recommended in any rack setup to ensure appropriate power application as well as superior
power surge protection, the FSR Power Conditioning and Sequencing (SPC) System be utilized.
The BMS System, along with the associated program inputs, is an audio system of some complexity and
requires a proper grounding procedure be followed.
WALL PLATE GROUNDING CONSIDERATIONS
In order to prevent damage to the BMS system from ESD (Electro-Static Discharge), it is incumbent upon
the installer to carefully consider the grounding of the system. Since the BMS is a digital/audio hybrid,
proper ground is essential to maintaining audio quality while preventing damage to the electronic circuitry.
Rear of BMS Wall plate
GROUND JUMPER
The BMS wall plates should be grounded to prevent damage due to ESD events. The best way to guard
against ESD damage in any system is to return the charge to ground by the shortest path possible. A direct
connection between the wall plate and conduit ground is the most desirable method.
The BMS wall plates are provided with a ground jumper to allow the installer to connect or disconnect the
metal of the wall plate from the DC ground of the wall plate electronics. If the electrical mounting boxes
are already grounded, this jumper should be disconnected to prevent a ground loop. In systems that do not
have grounded electrical boxes, the ESD ground path is through the shield and/or power ground pair con-
ductors of the recommended cable to the chassis of BMS rack unit.
MAIN UNIT
The Main Unit is connected to ground either through the rack or the plug-in power supply that is supplied
with the unit.