Installation Leaflet
Page 7 Effective: April 2003
Pow-R-Command 100
IL01412003
For More Information visit www.cutler-hammer.com
SECTION 3: LOW-VOLTAGE DEVICE
TERMINATION
All open areas in the panels are considered
as low-voltage/class-2 termination areas.
No voltages above 28VAC are permitted in
this area. Inputs are designed so that only
dry contact devices are accepted.
NO EXTERNAL VOLTAGES SHOULD BE
APPLIED TO THE LOW-VOLTAGE
TERMINAL BLOCKS. ALL NECESSARY
POWER IS PROVIDED BY THE PANEL.
Low-voltage devices should be terminated
using a minimum #22AWG twisted pair
wire. Shielding is generally not required.
Low-voltage device cables should not be
located in the same conduit with the high-
voltage load wires. Be sure the wire type
you use is rated properly, especially for
plenum or hazardous applications.
3-1 PANELBOARD
In most cases, Application Specific Cards
will be located in the 7X Expansion Chassis
installed in the panel. Power supply and
Network connections will be provided in the
factory.
In rare case of the 7X-Expansion Chassis
located externally to the panel, the network
cable and the power supply cable should
be installed between the panel and the 7X-
Expansion Chassis. For Network termina-
tion, please refer to SECTION 5.
The personnel installing the panel are
responsible for providing and termination
wiring of all external low-voltage devices.
Use knockouts provided on the bottom and
sides of the chassis to enter the low-
voltage termination area.
All low-voltage (dry closure) devices
should be terminated on the 7X board
terminal blocks TB1, TB2, and TB3. Terminal
blocks
TB1
and
TB3
are designated
locations for inputs from low-voltage
devices—numbered respectively
1-24
and
25-48
. Terminal block
TB2
is a
COMMON
(ground) terminal for all low-voltage
devices terminated in the panel.
Network “Out”
Connector
Power Supply
Connector
Network “In”
Connector
Low-Voltage Device
Terminals COMMON
Application Specific
Controller Connectors
Low-Voltage Device
Terminals 1-24
Low-Voltage Device
Terminals 25-48
Figure 3-1: 7X-Expansion Chassis Back-Plane Board
