P.2.18
SEL-411L Relay Protection Manual Date Code 20151029
Installation
Jumpers
Changing Serial Port Jumpers
You must remove the EIA-232 board to access the serial port jumpers.
Perform the following steps to change the JMP1A, JMP2A, and JMP2B
jumpers.
Step 1. Follow your company standard to remove the relay from
service.
Step 2. Disconnect power from the relay.
Step 3. Retain the GND connection, if possible, and ground the
equipment to an ESD mat.
Step 4. Unscrew the keeper screws and disconnect any serial cables
connected to the PORT 1, PORT 2, and PORT 3 rear-panel
receptacles.
Step 5. Locate the jumper you want to change (see Figure 2.16).
Step 6. Install or remove the jumper as needed (see Table 2.5 for
jumper position descriptions).
Step 7. Reinstall the relay EIA-232 board and tighten the keeper
screws.
Step 8. Reconnect any serial cables that you removed from the EIA-232
PORTS in the disassembly process.
Step 9. Follow your company standard procedure to return the relay to
service.
I/O Interface Board
Jumpers
Jumpers on the I/O interface boards identify the particular I/O board
configuration and I/O board control address. Five I/O interface boards are
available: INT2, INT7, INTC, INTD, and INTE (see I/O Interface Boards for
more information on these boards). The jumpers on these I/O interface boards
are at the front of each board.
Contact with instrument terminals
can cause electrical shock that can
result in injury or death.
Have only qualified personnel service
this equipment. If you are not
qualified to service this equipment,
you can injure yourself or others, or
cause equipment damage.
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.
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