34
SEL-300G Relay
Quick-Start Guide
Date Code 20170804
Circuit Board Jumpers
Password and Breaker Jumpers
If an output contact is operating as an “extra alarm” (driven by the same signal
that operates the dedicated ALARM output contact), it will be in the opposite
state of the dedicated ALARM output contact in a standard relay shipment. In
a standard relay shipment, the dedicated ALARM output contact comes as a
b-type output contact and all the other output contacts (including the “extra
alarm”) come as a-type output contacts.
The output contact type for any output contact can be changed (see preceding
subsection
). Thus, the dedicated ALARM output
contact and the “extra alarm” output contact can be configured as the same
output contact type if desired (e.g., both can be configured as b-type output
contacts).
Password and
Breaker Jumpers
has C and D jumper positions, too.
Jumpers should not be installed in the C and D jumper positions.
EIA-232 Serial Port
Voltage Jumpers
The jumpers listed in
connect or disc5 Vdc to Pin 1 on the
corresponding EIA-232 serial ports. The +5 Vdc is rated at 0.5 A maximum
for each port.
In a standard relay shipment, the jumpers are OFF (removed/not in place) so
that the +5 Vdc is not connected to Pin 1 on the corresponding EIA-232 serial
ports. Put the jumpers ON (in place) so that the +5 Vdc is connected to Pin 1
on the corresponding EIA-232 serial ports.
Table 9
Password and Breaker Jumper Positions for Standard Relay
Shipments
Password Jumper/
Position (for standard
relay shipments)
Breaker Jumper/Position
(for standard relay
shipments)
Reference Figures
JMP6-A = OFF
JMP6-B = ON
Table 10
Password and Breaker Jumper Operation
Jumper Type
Jumper Position
Function
Password
ON (in place)
Disable password protection for serial
ports and front panel
a
a
View or set the passwords with the
PASSWORD
command.
OFF (removed/not in place)
Enable password protection1 for serial
ports and front panel
Breaker
ON (in place)
Enable serial port commands
OPEN
,
CLOSE
, and
PULSE
b
b
The
OPEN
,
CLOSE
, and
PULSE
commands are used primarily to assert output contacts for circuit
breaker control or testing purposes.
OFF (removed/not in place)
Disable serial port commands
OPEN
,
CLOSE
, and
PULSE
Table 11
EIA-232 Serial Port Voltage Jumper Positions for Standard Relay
Shipments
EIA-232 Serial Port 2
(rear panel)
EIA-232 Serial Port 3
(rear panel)
Reference Figures
JMP2 = OFF
JMP1 = OFF
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