Effective.June.2007
Page
RS-485 PONI
66A2070 Rev. B
Introduction
The RS-485
P
roduct.
O
perated.
N
etwork.
I
nterface (RS-485
PONI) is a communications device that allows Eaton’s
Cutler-Hammer IQ Meters, IQ and MP Protective relays, and
IQ Transfer switches to communicate over a Modbus RTU
Network .
These host devices interface to the RS-485 PONI through
their DB9 PONI interface connector. The host device
provides a 24V DC voltage through the DB9 connector.
A 5-pin connector is provided for wiring to the RS-485
network. The RS-485 PONI mounts on the rear panel of the
host product.
Figure 1: RS-485 PONI
Product Compatibility
The following products are supported by the RS-485 PONI.
To ensure proper operation, the firmware of the host devices
must.be.considered .
Table 1: Firmware Compatibility
IQ Host
RS-485 V1.00 RS-485 V1.01 RS-485 V1.02
IQ Analyzer
Ver ..2 .02
Ver ..2 .02
Ver.2 .02
IQ DP-4000
Ver ..1 .04
Ver ..1 .04
Ver.1 .04
IQ Data Plus II Rev. 8B
6/26/95
Rev. 8B
6/26/95
Rev. 8B
6/26/95
MP-3000
Ver ..1 .08
Ver ..1 .08
Ver ..1 .08
ATC-400
Ver ..1 .40
Ver ..1 .40
Ver ..1 .40
IQ Transfer II
Ver ..4 .5
Ver ..4 .5
Ver ..4 .5
MP4000
Not.Supported Not.Supported Ver ..1 .06
Features
The RS-485 PONI provides the following features:
•
A means of communicating using the standard Modbus
RTU Protocol.
•
Various baud rates are selectable for networking flexibility.
•
Addresses 0-99 are selectable by way of two rotary
switches.
•
Status light provides indication of proper operation and
also functions as an error indicator light.
•
Data in IEEE Floating Point and fixed-point formats.
•
Host interface communications indicator light.
•
RS-485 TX/RX indicator lights.
•
Termination resistor is DIP switch-selectable.
Hardware Installation
The RS-485 PONI is designed to be installed, operated
and.maintained.by.adequately.trained.personnel ..
These instructions do not cover all details, variations
or combinations of the equipment, its storage, delivery,
installation, checkout, safe operation or maintenance.
NOTE: De-energize the device to which the RS-485
PONI will be attached or wired; otherwise, erroneous
operation or damage to equipment could occur.
The installer must comply with the National Electric Code
and local codes or regulations, as well as safety practices,
for this class of equipment.
. Ensure that mounting screws and adapter bracket for the
RS-485 PONI have been included.
2. Consult the Instruction Leaflet (IL) mounting instructions
for each RS-485 PONI-compatible host device.
The following sections – 3a through 3f – explain common
examples of mounting instructions.
3a. Mounting to an IQ Analyzer
Disconnect power to the IQ Device. Many applications will
have a separately mounted power module. In this case,
mount the RS-485 PONI to the IQ Device using the stacking
screws.provided .
