
2.18
SEL-700G Relay
Instruction Manual
Date Code 20170814
Installation
I/O Configuration
Password, Breaker
Control, and SEL
BOOT
Jumper Selection
Figure 2.7 shows the major components of the
B
-slot card in the base unit.
Notice the three sets of pins labeled A, B, and C.
Figure 2.7
Pins for Password, Breaker Control, and SEL
BOOT
Jumper
Pins labeled A bypass the password requirement, pins labeled B enable
breaker control, and pins labeled C force the relay to the SEL operating
system called SEL
BOOT
. In the unlikely event that the SEL-700G suffers an
internal failure, communications with the relay can be compromised. Forcing
the relay to SEL
BOOT
provides a means of downloading new firmware. To
force the relay to SEL
BOOT
, position the jumper in Position C, as shown in
Figure 2.7 (SEL
BOOT
forced). Once the relay is forced to SEL
BOOT
, you can
communicate with the relay only through the front-panel port.
To gain access to Level 1 and Level 2 command levels without passwords,
position the jumper in position A, as shown in Figure 2.7 (password
bypassed). Although you gain access to Level 2 without a password, the alarm
contact still closes momentarily when you access Level 2. Table 2.18 tabulates
the functions of the three sets of pins and jumper default positions.
Table 2.18
Jumper Functions and Default Positions
Pins
Jumper Default Position
Description
A
Not bypassed (requires password)
Password bypass
B
Off (breaker control disabled)
Enable breaker control
a
a
Jumper position affects breaker control using the
PULSE
,
OPEN
, or
CLOSE
command via the
serial port, front panel, or communications protocols. Jumper position does not affect
breaker control using remote bits, which are always enabled.
C
Not bypassed (not forced SEL
BOOT
)
Forced SEL
BOOT
JMP1
A B C
JMP1
A B C
JMP1
A B C
JMP1
A B C
Password
Bypassed
Default
Positions
SEL
BOOT
Forced
Remote
Breaker
Control
Allowed
JMP1
A B C
Содержание SEL-700G Series
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