audioShare Control Relay Module Installation Guide v00r01-090421.wpd
7
Wiring Information
WARNING:
audioShare
®
devices contain complex electronic circuitry that is highly
sensitive to electrostatic discharge (ESD).
audioShare
®
CRMs have been designed to
shunt electrostatic discharge away from these sensitive circuits. In order for this protection
to be fully effective,
the system power supply must be connected directly to an
electrical/earth ground
. Failure to properly ground the
audioShare
®
power supply will void
the warranty and is in violation of the National Electrical Code (NEC).
NOTE:
No special precautions need to be taken when running Cat 5 wiring as to proximity
to other electrical wiring or appliances.
The
audioShare
®
system is designed for optimum performance using Cat. 5 (or better) eight-
conductor cables (4 twisted pairs). This is the recommended wire type. However, other types of
twisted pair cables such as Cat. 3 will work with a decrease in the maximum length of a run. Six-
conductor, 3 pair cables may also be used (Nutone IW-6 for example), but limit the system to only
one media bus unless the ASA468 Retrofit Adapter is employed. Use of non-recommended wire
types should only be considered when upgrading existing installations where old wiring is too
difficult or too expensive to replace. For more information regarding retrofit wiring visit our
website or contact DHC Tech Support.
Pre-Wiring
Pre-wiring for a CRM is as simple as running a Cat 5 (or equivalent) from an
audioShare
®
hub or
PIM or PEM in a home run or daisy chain configuration to the location where the CRM will be
connected to the devices needing to be controlled.
The Cat. 5 may be daisy chained through the CRM to another
audioShare
®
device or may be the
end of the line with a network terminator installed in the unused RJ45 port.
If the CRM is the only device that is or will ever be attached to that run, the wiring may be as little
as 2 twisted pairs (no flat, un-twisted ribbon cable is permitted). The system power (RJ45 pins 4
& 5) and the Data Bus (RJ45 pins 7 & 8) are the only required connections to operate a CRM. Of
course, it is highly recommended that Cat. 5 be used in an
audioShare
®
system whenever possible.
The CRM should be attached to the external device(s) by the appropriate length and type of wire (up
to 14 ga.) suited to that particular operation. The terminals inside the top cover are clearly labeled.
A ground terminal (#1) provides a direct connection to earth ground (if needed) via the Cat. 5 to the
system power supply which should be connected to the electrical (earth) ground. The ground
terminal is not intended to be grounded at the CRM. Doing so will create a ground loop which could
affect system operation.
As far as power consumption is concerned, ten CRMs are the equivalent of one Wall Station.