FSR ML-116 - Manual (Page 9)

FSR
ML-116 INSTALLATION DATA
Telephone 973-785-4347 page 9
ML-116 SYSTEM BLOCK DIAGRAM
WALLPLATE GROUNDING CONSIDERATIONS
In order to prevent damage to the ML-116 system from ESD (Electro-Static Discharge), it is incum-
bent upon the installer to carefully consider the grounding of the system. Since the ML-116 is a
digital/audio hybrid, proper ground is essential to maintaining audio quality while preventing dam-
age the electronic circuitry.
The metal faceplate of the ML-116 wallplates must 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 faceplate and conduit ground is the most
desirable method. At the same time, the DC ground of the system must be kept isolated from con-
duit ground, or ground loop noise will result.
The ML-116 wallplates are provided with either a ground wire or a ground jumper to allow for
grounding of the metal faceplate. If the electrical mounting boxes are already grounded, the ground
wire must be insulated or the jumper disconnected to prevent a ground loop. If the electrical box is
not grounded, connect the ground wire to the SHIELD terminal of wallplates so equipped. On
wallplates that have a ground jumper, ensure that the jumper is installed. In systems that do not have
grounded electrical boxes, the ESD ground path is through the shield conductor of the recommended
cable, through the ML-116’s CPU card, and to the chassis of ML-116 rack unit.