Installation Leaflet
Page 26 Effective: April 2003
Pow-R-Command 100
IL01412003
For More Information visit www.cutler-hammer.com
SECTION 6: PERSONAL COMPUTER
TERMINATION
In most cases, the PC will be located in the
office, remotely to the system. A Network
Interface Box (NIB) should be used to
communicate between the system and the
PC. The NIB is a modem like box which is
placed on top of the PC or on a table
nearby. The NIB should be located next to
the PC in the office. The NIB becomes a
Master panel for the system and is
connected to the system through the
Network. The NIB should be located on
either end of the system’s Network to
extend the Daisy Chain configuration. The
personnel installing the system are
responsible for providing and terminating
the network to the NIB. The NIB uses the
office receptacle to supply the power.
Since the NIB is normally located at one end
of the Network, it will normally have the
Network termination 120 ohm resistor.
When a good chassis ground is available at
the NIB location, the Shield on the NIB is the
preferred ground location for the shield. If
not, the preferred ground location for the
Shield is the closest Network panel to the
NIB.
When connecting the Network wires to the
NIB network connector, the Network black
wire is connected to the ‘+’ terminal and the
Network white wire is connected to the ‘-‘
terminal. The shield is connected to the third
terminal. If the NIB is located at the end of
the Network, a 120 ohm termination resistor
should be connected between the ‘+’ and ‘-‘
terminals.
6-1 NIB TO PC CONNECTION
The PC is connected to the NIB through the
DB9 serial communication connector. A
standard serial modem cable is used to
connect the NIB to an available serial
communication port on the PC. The length of
the communication cable between the PC
and the NIB can not exceed 25 feet.
6-2 ETHERNET SERVER TO PC
CONNECTION
In some cases it is desirable to connect the
Network to a PC using a standard Ethernet
connection. For this need the Ethernet
Server was created. The Ethernet Server
has the same purpose as a NIB, except it is
designed for connection to Ethernet. In this
case the Ethernet Server need not be
physically located near the PC but rather
near the Ethernet hub or repeater. The PC
can be located anywhere on the Ethernet
network. The connection between the
Ethernet Server and the Ethernet is done
using a standard CAT5 connector located
on the Ethernet Server. The Ethernet Server
will communicate at 10base T and must
have a fixed IP address assignment on the
Ethernet network.
Power Connector
On/Off Switch
Power LED
Network Connector
RS-485 Test Port
DB-9 Connector For RS-232
Communications
Figure 6-1: Network interface Box
Power Connector
On/Off Switch
Power LED
RS-485 Test Port
Network Connector
CAT5 Connection For 10base T
Ethernet Communications
Network Status LED’s
Figure 6-2: Ethernet Server
