Data Communications - Eaton Cutler-Hammer FP-6000 Series Instructions Manual

Instructions for the FP-6000 Protective Relay

10 Data Communications

10.1 Overview of Ports
The FP-6000 is designed to provide several communication
options. The major options are single-point RS-232 and 2-wire
INCOM Local Area Network (LAN). This section describes these
two communication ports and the two major software packages
which make use of these ports to interface with the FP-6000. One
additional software package, the FlashLoader, is treated in
Section 12 - Troubleshooting. That program updates the
firmware, an infrequent event which is not part of the day-to-day
operation of the FP-6000.
10.1.1 Handling of Multiple Communication Hosts
The FP-6000 is designed to handle simultaneous
communications with the front and rear communications
channels. Monitoring functions can occur in parallel, however
service routines like setpoint download or control functions will
be handled on a "first come – first serve" basis. Whichever port
starts first will lock the other port out until finished.
10.1.2 INCOM Network Information and Wiring
The following simplified rules apply given a system consisting of
a single daisy chained main cable link between master and slave
devices. For more complex considerations, including star
configurations or systems containing old and new INCOM slave
devices, please refer to the IMPACC Wiring Specification 17513
available on the Eaton web site.
• The maximum system capacity is 10,000 ft. (3,048 m) of
communications cable and 1000 slave devices.
• The main cable link must be terminated at each end by a ½ W,
100 ohm carbon resistor.
• Non-terminated taps, up to 200 ft. (60.9 m) in length, off the
main link are permitted, but add to the total cable length.
• Terminals 1 and 2 of the INCOM J1 or J2 terminal plugs are for
the twisted pair conductors, terminal 3 is for the shield. The
polarity of the twisted pair is not important. Note: It is highly
recommended that ferrules be used to dress the ends of the
cable leads to minimize frayed connections and add stress
release.
• Always follow the National Electrical and local codes for cable
routing.
Figure 76. INCOM Network Connection.
IB02602004E
• When leaving a building, lightening surge protection is
• The twisted pair cable must be one of the following:
10.1.3 Front RS-232 Port Connection
The Front Panel RS-232 port provides the user convenient PC or
lap-top access to the data and update features of the FP-6000.
The user may access all the data measured and calculated,
program and retrieve settings, invoke or monitor logging or data
capture activity, and update firmware through the Front Panel
RS-232 port.
The FP-6000 places its transmit onto pin 2 and its receive onto
pin 3, making it a Data Set or Data Communication Equipment
(DSE or DCE) interface under the definitions of the RS-232
standard. PCs are generally defaulted to Data Terminal (DTE),
which allows them to connect directly to a Data Set with straight-
through wiring. Note that the FP-6000 communicates through a
9-pin D-Subminiature Connector, whereas a PC RS-232
connector may be either a 9-pin or a 25-pin D-Subminiature
Connector. The "straight-through" wiring for a 9-pin to 9-pin
cable is not the case for a 9-pin to 25-pin cable. (See Figure 77.)
The wire names are related to the Data Terminal end, thus RS-
232 output of the FP-6000 is connected to the Receive line, and its
RS-232 input is connected to the Transmit line.
The FP-6000 uses none of the RS-232 hardware control lines.
Although the FP-6000 operates with the "3-wire" connection
shown in Figure 77, a standard off-the-shelf serial cable will allow
communication. An example of an easily available and
acceptable cable is the RadioShack
Female DB9 Shield RS-232C Cable. This cable connects 1-1, 2-2,
..., 9-9. That is, the cable is connected "straight-through. "
6
For more information visit: www.eaton.com
Instructional Literature
Effective: May 2008
required. Phoenix Contact Plugtrab is recommended. This
two-piece design absorbs 0.5 db of signal strength (reduces
cable length maximum by ~ 250 ft.[76.2 m] per protector.):
– Base UFBK-BE #27 83 09 5
– Plug UFBK-M-2-PE-24DC-ST #28 17 05 5
– CH IMPCABLE – 600 V AWM, 300 V CM, 90C
(attenuation 1.6 db/1 K')
– Belden 3072F – 600 V TC, 75C (attenuation 2.0 db/1 K')
– Belden 9463 family (many variations are available) or
equivalent
Page 183
® , 26-117B, Male DB9 to