SEL-735 Meter Circuit Card
Upgrade Instructions
SEL ships SEL-735 Power Quality and Revenue Meters with four standard
circuit cards and any optional cards a customer orders.
You can add optional circuit cards at any time after the initial purchase of an
SEL-735. The following instructions explain how to upgrade an existing
SEL-735 for the addition of communications, I/O, AO/DO, and power supply
cards.
Installing the Cards and Upgrading the SEL-735
DANGER
Hazardous voltages and currents are
present inside this device when external sources are connected to input
and output terminals. Contact with
internal circuitry can cause electrical
shock that can result in injury or
death. Disconnect or de-energize all
external connections before opening
this device.
CAUTION
This procedure requires handling components sensitive to Electrostatic Discharge (ESD). Perform these steps in a
manner that prevents possible damage by ESD. Use the disposable ESD
wrist strap provided with this upgrade
kit. Handle all printed circuit board
assemblies by their edges. If your
facility is not equipped to work with
ESD-sensitive components, we recommend that you return the meter to
SEL for upgrading.
Although not required when adding meter cards, SEL always recommends that
you upgrade to the latest version of the meter firmware. For information on the
latest firmware version, see https://selinc.com/products/735/#tab-firmware.
Step 1. Remove the power supply inputs, current inputs, and voltage inputs.
Step 2. Remove all other connections.
Step 3. Remove the rear panel.
Step 4. Remove the black plastic blanker plate covering the expansion slot(s)
as applicable.
Step 5. Insert the expansion card in the proper slot, ensuring that the card
edge connectors are seated properly. See Figure 1.
Device Configuration Labels
NOTE: The firmware version in the
meter must be R200 or higher to
perform a hardware upgrade.
Rear Panel
Figure 1
Power Supply Label
Slot A (Power Supply)
Slot C (Expansion Slot 1)
Slot D (Expansion Slot 2)
24/48 Vdc Label
SEL-735 Expansion Slots
Step 6. Reattach the rear panel by inserting the circled screws first. See
Figure 1.
Step 7. Apply the appropriate labels to the meter, referring to Figure 1.
a. Place any supplied device configuration labels to the top overlay
of the meter.
b. If you install a new 24/48 Vdc power supply, place the supplied
small yellow label above the power supply inputs, which are
located on the left rear side of the meter.
Date Code 20211123
SEL-735 Meter Circuit Card Upgrade Instructions
2
c. If you install a communications card with the modem option,
place the supplied modem compliance label over the existing
sticker on the left side of the meter.
d. If you install a communications card without the modem option,
insert the supplied black plastic blanker plate over the Port 4B
opening on the rear panel.
CAUTION
When changing the power supply,
ensure that the input voltage matches
the rated power supply voltage.
Step 8. Attach all connections.
a. Attach any new connections for the newly installed upgrade
cards.
b. Reattach any connections removed in Step 2.
c. Reattach the power supply inputs, current inputs, and voltage
inputs.
d. Turn on the meter and connect it so you can communicate with
the meter.
Step 9. Use an ASCII terminal connection to enter Access Level 2.
Default passwords:
Access Level 1: OTTER
Access Level 2: TAIL
Step 10. If you installed an AO/DO card, issue a STA command. The
SEL-735 will detect the AO/DO card and prompt you to accept
changes; enter Y at the prompt. For all other cards, issue a PAR command.
Step 11. Make the required SEL-735 part number changes as follows:
a. Refer to Figure 2 and Table 1 for the monochromatic display
model.
b. Refer to Figure 3 and Table 2 for the color touchscreen model.
c. Refer to Table 3 and Table 4 for both models.
NOTE: You must change the meter
part number to reflect the installed
hardware. The meter might not enable
if you enter an incompatible part
number.
0
7
3
Figure 2
5
x
x
x
0
x
(A)
1 1
2 2
4 3
4
5
6
(C)
(D)
x X x X X x
F
A 1
G
B 2
C 3
D 4
5
6
x
x
x
x
x
x
x
x
SEL-735 Monochromatic Display Model Part Number (MOT)
Table 1 SEL-735 Monochromatic Display Model Slot A, Power Supply
(Sheet 1 of 2)
SEL-735 Meter Circuit Card Upgrade Instructions
Power Supply
Control Input Voltage
MOT
Number
(Slot A)
Kit Number
125/250 Vdc or Vac
24 Vdc/Vac
4
1
9754001
48 Vdc/Vac
4
2
9754002
110 Vdc/Vac
4
3
9754003
125 Vdc/Vac
4
4
9754004
220 Vdc/Vac
4
5
9754005
250 Vdc/Vac
4
6
9754006
Date Code 20211123
3
Table 1 SEL-735 Monochromatic Display Model Slot A, Power Supply
(Sheet 2 of 2)
Power Supply
Control Input Voltage
MOT
Number
(Slot A)
Kit Number
24/48 Vdc
24 Vdc/Vac
2
1
9754007
48 Vdc/Vac
2
2
9754008
110 Vdc/Vac
2
3
9754009
125 Vdc/Vac
2
4
9754010
220 Vdc/Vac
2
5
9754011
250 Vdc/Vac
2
6
9754012
12 Vdc/Vac
1
0
9754016
12/24 Vdc
0
7
3
5
L x
2
1
1
9754017
125 Vdc/Vac
1
4
9754018
0
x
(A)
2 1
2 2
4 3
4 4
4 5
4 6
(C)
(D)
x X x X X x
F
A 1
G
A 2
A 3
A 4
A 5
A 6
B 1
B 2
B 3
B 4
B 5
B 6
C X
D X
x
x
x
Figure 3
SEL-735 Color Touchscreen Model Part Number (MOT)
Table 2
SEL-735 Color Touchscreen Model Slot A, Power Supply
MOT
Number
(Slot A)
x
Power Supply
Control Input Voltage
125/250 Vdc or Vac
110 Vdc/Vac Digital Input 4
3
9754L432
125 Vdc/Vac Digital Input 4
4
9754L442
220 Vdc/Vac Digital Input 4
5
9754L452
250 Vdc/Vac Digital Input 4
6
9754L462
24 Vdc/Vac Digital Input
2
1
9754L212
48 Vdc/Vac Digital Input
2
2
9754L222
24/48 Vdc
Table 3
Date Code 20211123
24 Vdc/Vac
x
x
x
x
Kit Number
Communications Board, Slot C
Communication Boards
MOT Number (Slot C)
Kit Number
EIA-232/EIA-485
F
9751001
Telephone Modem/EIA-232/EIA-485
48 Vdc/Vac
G
9751002
SEL-735 Meter Circuit Card Upgrade Instructions
4
Table 4
I/O Board Expansion, Slot D
I/O Type
Control Input Voltage
MOT Number
(Slot D)
Kit Number
4 AO (1 mA) / 4 DO
N/A
C
X
9752013
D
X
9752014
24 Vdc/Vac
B
1
9752001
48 Vdc/Vac
B
2
9752002
110 Vdc/Vac
B
3
9752003
125 Vdc/Vac
B
4
9752004
220 Vdc/Vac
B
5
9752005
250 Vdc/Vac
B
6
9752006
24 Vdc/Vac
A
1
9752007
48 Vdc/Vac
A
2
9752008
110 Vdc/Vac
A
3
9752009
125 Vdc/Vac
A
4
9752010
220 Vdc/Vac
A
5
9752011
250 Vdc/Vac
A
6
9752012
4 AO (20 mA) / 4 DO
Electromechanical Outputs
Solid-State Outputs
Step 12. Upon receiving a prompt from the SEL-735, enter the new part number. You can edit only the values in bold shown in Figure 2 and
Figure 3.
Figure 4 shows the part number modification for addition of a
24/48 Vdc power supply card to Slot A, a communications card with
modem to Expansion Slot C (#1), and a solid-state I/O card to Expansion Slot D (#2) to a meter with a monochromatic display.
=>>PAR <Enter>
Part Number
PARTNO :=
0735LX20944EXXXXXX16101XX
?0735LX20922EGXA2XX16101XX
Figure 4
Example of Entering a New Part Number
Step 13. After you enter a valid part number, the meter responds Settings
Saved. Restarting the meter, and then restarts.
Step 14. If you enter an invalid part number, the meter responds with Invalid
part number.
Step 15. After the meter restarts, ensure the ENABLED LED on the front panel is
illuminated.
Step 16. Use an ASCII terminal connection to enter Access Level 1. Use the
STA command and installation testing to ensure proper operation of
the expansion card before you return the meter to service.
SEL-735 Meter Circuit Card Upgrade Instructions
Date Code 20211123
5
Technical Support
We appreciate your interest in SEL products and services. If you have questions
or comments, please contact us at:
Schweitzer Engineering Laboratories, Inc.
2350 NE Hopkins Court
Pullman, WA 99163-5603 U.S.A.
Tel: +1.509.338.3838
Fax: +1.509.332.7990
Internet: selinc.com/support
Email: info@selinc.com
Date Code 20211123
SEL-735 Meter Circuit Card Upgrade Instructions
6
WARNING
Operator safety may be impaired if the device is used in a manner not
specified by SEL.
CAUTION
Equipment components are sensitive to electrostatic discharge (ESD).
Undetectable permanent damage can result if you do not use proper ESD
procedures. Ground yourself, your work surface, and this equipment
before removing any cover from this equipment. If your facility is not
equipped to work with these components, contact SEL about returning
this device and related SEL equipment for service.
AVERTISSEMENT
La sécurité de l’opérateur peut être compromise si l’appareil est utilisé
d’une façon non indiquée par SEL.
ATTENTION
Les composants de cet équipement sont sensibles aux décharges électrostatiques (DES). Des dommages permanents non-décelables peuvent
résulter de l’absence de précautions contre les DES. Raccordez-vous correctement à la terre, ainsi que la surface de travail et l’appareil avant d’en
retirer un panneau. Si vous n’êtes pas équipés pour travailler avec ce
type de composants, contacter SEL afin de retourner l’appareil pour un
service en usine.
© 2021 by Schweitzer Engineering Laboratories, Inc. All rights reserved.
All brand or product names appearing in this document are the trademark or registered
trademark of their respective holders. No SEL trademarks may be used without written
permission.
2350 NE Hopkins Court • Pullman, WA 99163-5603 U.S.A.
Tel: +1.509.332.1890 • Fax: +1.509.332.7990
selinc.com • info@selinc.com
SEL products appearing in this document may be covered by U.S. and Foreign patents.
Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded
under federal and international copyright and patent laws in its products, including
without limitation software, firmware, and documentation.
The information in this document is provided for informational use only and is subject
to change without notice. Schweitzer Engineering Laboratories, Inc. has approved only
the English language document.
This product is covered by the standard SEL 10-year warranty. For warranty details,
visit selinc.com or contact your customer service representative.
SEL-735 Meter Circuit Card Upgrade Instructions
*PLS735-03*
Date Code 20211123