Installation Guide

Power Sources for the Conext ComBox
975-0679-01-01 Revision F 1–9
Power Sources for the Conext ComBox
The Conext ComBox consumes an average of 2 W under most operating
conditions and up to 10 W maximum. The power sources connected to the
Conext ComBox must be capable of providing this power requirement.
There are three power sources for the Conext ComBox:
• AC/DC power adapter (supplied)
• Xanbus-enabled device via CAT5 or CAT5e cable (Xanbus cable)
• 24 V DC power input connections on the RS 485 Modbus connector
All three sources can be used alone or simultaneously. Typically, the AC/DC
power adapter (supplied) is used as a primary source with either a Xanbus or
RS 485 Modbus connection as secondary sources. See the following diagram for
connection locations.
Safety Extra Low Voltage (SELV) is a designation that refers to a circuit in which
the voltages within the circuit and from the circuit to ground have values that are
not a shock hazard, under both normal and single fault conditions. In the Conext
ComBox, the SELV circuits and their intended connections are:
• The supplied AC/DC power adapter connected to the power port of the Conext
ComBox.
• Xanbus communications and power which come from SELV circuits on Xanbus-
enabled Schneider products.
• 24 V DC power input connections which must be SELV and are connected to the
Conext ComBox via the RS 485 Modbus connector.
• SELV Ethernet circuits or Class 2 circuits (Class 2 is a 24V, 100VA limited circuit).
• An external SELV circuit connected via the Dry Contact connector (see “Wiring
the Dry Contact Connector” on page 2–9).
DANGER
HAZARD OF ELECTRIC SHOCK AND FIRE
Connect only to Safety Extra Low Voltage (SELV) circuits and power sources.
Failure to follow these instructions will result in death or serious injury.
AC/DC power
adapter
Xanbus cable
24 V DC input on
RS 485 connector