RDM172
Remote Display
Module
QUICK GUIDE
BG0324 Rev. A2
RDM172 Remote Display Module
QUICK GUIDE
The RDM172 is an optional remote display for the PM172 Powermeter.
It features a bright LED display (3 windows with 6 LEDs each), 18 LED
indicators, two communication receive/transmit LEDs, 6 control pushbuttons, and a communication port (RS-485). The RDM172 uses the
Modbus RTU transmission protocol for communication with the PM172
and acts as the Master.
The RDM172 offers approximately the same functions as the PM172
front panel, and supports both the PM172P and PM172E models without
additional adjustment. See the PM172 Installation and Operation Manual
for information on the display panel.
IMPORTANT
Please read instructions contained in this manual before
performing installation, and take note of the following precautions:
1. Ensure that the incoming DC power source is turned OFF
before performing any work on the instrument. Failure to do so
may result in serious or even fatal injury
and/or equipment damage.
2. Before connecting the instrument to the power source, check
that your power supply has 12V ±15% voltage and 350mA current.
3. Under no circumstances should the instrument be connected
to a power source if it is damaged.
4. To prevent potential fire or shock hazard, do not expose the
instrument to rain or moisture.
5. Mount the instrument away from heat sources in a dirt-free
environment. Do not operate the instrument in direct sunlight.
6. Setup procedures must be performed only by qualified
personnel familiar with the instrument and its associated electrical
equipment.
7. DO NOT attempt to open the instrument under any
circumstances.
8. Although designed to operate in an electrically noisy
environment, the instrument should not be placed near very high
electric fields. In the event that the instrument is mounted in a
harsh, noisy environment with high potential for electromagnetic
impulses from heavy switch gears, motors or lightning, it is
recommended to install appropriate protective devices such as
lightening and over-voltage arresters to incoming voltage and
communication inputs.
2
LIMITED WARRANTY
The manufacturer offers the customer a 24-month functional warranty on
the instrument for faulty workmanship or parts from date of dispatch from
the distributor. In all cases, this warranty is valid for 36 months from the
date of production. This warranty is on a return to factory basis.
The manufacturer does not accept liability for any damage caused by
instrument malfunction. The manufacturer accepts no responsibility for
the suitability of the instrument to the application for which it was
purchased.
Failure to install, setup or operate the instrument according to the
instructions herein will void the warranty.
Your instrument may be opened only by a duly authorized representative
of the manufacturer. The unit should only be opened in a fully anti-static
environment. Failure to do so may damage the electronic components
and will void the warranty.
NOTE
The greatest care has been taken to manufacture your instrument.
However, these instructions do not cover all possible contingencies that
may arise during installation, operation or maintenance, and not all
details and variations of this equipment are covered by these
instructions.
For additional information regarding installation, operation or
maintenance of this instrument, contact the manufacturer or your local
representative or distributor.
Table of Contents
1 Mechanical Installation _____________________ 3
1.1 Standard Cutouts (round or square) __________________ 3
1.2 Special Cutouts ___________________________________ 4
2 Electrical Installation_______________________ 5
3 Setup on the RDM _________________________ 6
3.1 Instrument Setup Menus____________________________ 6
3.2 Performing RDM Communication Adjustment _________ 6
3.3 RDM Setup Menu __________________________________ 6
4 Status Information Menu____________________ 8
5 Troubleshooting: Fault Condition Display _____ 9
6 Communications __________________________ 9
BG0324 Rev. A2
3
1 Mechanical Installation
1.1 Standard Cutouts (round or square)
Figure 1-1 RDM172 Cutout Dimensions
Figure 1-2
RDM172 Mounting
STEP 1: Insert RDM into cut-out.
STEP 2: Fasten washers and nut on screws.
4
1.2 Special Cutouts
Figure 1-3 Panel Cutout Dimensions
Figure 1-4 RDM172 Mounting
5
2 Electrical Installation
The RDM172 is connected to the PM172 via terminals as shown
in Figure 2-1. One RDM unit can be connected in multi-drop
mode to up to 32 PM172 instruments.
Figure 2-1 RDM172 Electrical Connections
IMPORTANT: It is recommended to solder the wire ends
before attaching them to the connectors.
6
3 Setup on the RDM
3.1 Instrument Setup Menus
Following is a list of instrument setups menus available from the RDM.
Instrument Menu Access from the RDM
Basic yes
Communication ports yes
User selectable options yes
Analog output, analog expander -
Digital inputs yes
Timer yes
Alarm/Event set points yes
Pulsing output, pulse counter yes
Log memory partitions -
Real time clock yes
Instrument display -
For full setup instructions for these parameters, see the complete PM172
Installation and Operation Manual.
3.2 Performing RDM Communication Adjustment
Î Î Î Î
Press to activate middle window. Press▲▼, and scroll to Addr.
Press
to activate the lower window. Set the instrument address
value and press to save the selected value.
Press
▲▼, and scroll to bAud. Press to activate the lower
window. Set the baud rate value and press to save the selected
value.
3.3 RDM Setup Menu
Î Î Î Î
This menu allows you to view and change RDM properties. Table
1-1 lists available options with their code names and applicable
ranges.
SELECT
CH
G
diSP
Ï
Ð
ENTE
R
ENTER
SELECT
CH
G
diSP
Ï Ð
ENTE
R
ENTE
R
SELECT
SELECT
ENTE
R
SELECT
ENTE
R
7
Table 3-1 RDM Options
(∗ default setting)
Display Code Parameter Options Description
UPdt
Display
update time
0.1 - 10.0 s
(0.5)*
Defines interval between
display updates
ScrL
Auto scroll nonE*
2-15 s
Disables/enables auto scroll
on common measurements
display (main screen) and
defines scroll interval
rEtn
Auto return
to the main
screen
diS*, En Disables/enables auto return
to the main screen after 30
seconds of uninterrupted
use
VoLt
Primary or
secondary
voltage view
Pri*, SEc
Defines primary or
secondary voltage to show.
Ph.P
Phase
powers
display
mode
diS*, En Disables/enables display of
phase powers in common
measurements (main
screen)
Fund.
Fundamenta
l values
display
mode
diS*, En Disables/enables display of
fundamental values in
common measurements
(main screen)
dAtE Date format ndY*
dnY
Ynd
Defines the date format in
the RTC display: d=day,
n=month, Y=year
Each date format character
is set separately.
Addr Instrument
address
1*-247
diSP
5
S
crL
diSP
0.5
UPdt
diSP
ndY
dAtE
diSP
diS
Ph.P
diSP
diS
rEtn
diSP
Pri
VoLt
diSP
diS
F
und.
diSP
1
Addr
8
Display Code Parameter Options Description
bAud Baud rate 2400,
4800,
9600,
19200*
dAtA Data format 8n*(8 bits,
no parity)
4 Status Information Menu
Table 4-1 lists the displays available from the RDM Status
Information Menu. The display windows are labeled in the table
as follows: 1=upper window, 2=middle window, 3=lower window.
Table 4-1
Page Window Parameter Digits Unit
1 1
PHAS.
Label
1 2
rOt.
Label
1 3 Phase rotation (POS/NEG/ERR) 4
2 1
rEL.
Label
2 2
1.2.
Label
2 3 Relay status #1-#2 2
3 1
St.In
Label
3 2
1.2.
Label
3 3 Status inputs #1-#2 2
4 1
Cnt.1
Label
4 3 Counter #1 6
5 1
Cnt.2
Label
5 3 Counter #2 6
6 1
Cnt.3
Label
6 3 Counter #3 6
7 1
Cnt.4
Label
7 3 Counter #4 6
8 1
bAtt
Label
8 3 The battery status (NORMAL/LOW)
diSP
19.2
bAud
diSP
8n
dAtA
9
5 Troubleshooting: Fault Condition Display
The RDM172 fault condition screen provides an indication of
communication problems, should any occur.
Reasons for a communication fault could be:
• Instrument switched off
• Communication cable disconnected
• Instrument communication setup changed
• RDM172 communication setup changed
Press to check or alter the RDM172 adjustment and scroll to
communication options.
6 Communications
NOTE
Where an RS-232/RS-422 converter is used, R1 is not applicable
since it is built in to the converter.
Use a shielded, 0.33 mm2/22 AWG twisted pair cable for each
communication link; terminate the ends of multi-drop line with 200-500
Ohm resistors. Connect the cable shield to the ground input.
ENTER
diSP
Con.
E
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