Date Code 20001006
Inputs, Outputs, Timers, and Other Control Logic
7-1
SEL-351 Instruction Manual
SECTION 7: INPUTS, OUTPUTS, TIMERS, AND OTHER
CONTROL LOGIC
This section explains the settings and operation of:
Optoisolated inputs
IN1 - IN8
IN101 - IN106
IN201 - IN208
model 0351xT
models 0351x0, 0351x1,
and 0351xY
models 0351x1 and 0351xY
Local control switches
local bits LB1 - LB8
Remote control switches
remote bits RB1 - RB8
Latch control switches
latch bits LT1 - LT8
Multiple setting groups
group switching settings
SS1 - SS6
SEL
OGIC
®
Control Equations
variables/timers
SV1/SV1T - SV16/SV16T
Output contacts
OUT1 - OUT11 and ALARM
OUT101 - OUT107 and ALARM
OUT201 - OUT212
model 0351xT
models 0351x0, 0351x1,
and 0351xY
models 0351x1 and 0351xY
Rotating default displays
display points DP1 - DP8
The above items are all the logic input/output of the relay. They are combined with the
overcurrent, voltage, frequency, and reclosing elements in SEL
OGIC
Control Equation
settings to
realize numerous protection and control schemes.
Relay Word bits and SEL
OGIC
Control Equation setting examples are used throughout this section.
See
Section 9: Setting the Relay
for more information on Relay Word bits and SEL
OGIC
Control
Equation settings. See
Section 10: Serial Port Communications and Commands
for more
information on viewing and making SEL
OGIC
Control Equation settings (commands
SHO L
and
SET L
).
O
PTOISOLATED
I
NPUTS
Figure 7.1 through Figure 7.3 show the resultant Relay Word bits (e.g., Relay Word bits IN1
through IN8 in Figure 7.1) that follow corresponding optoisolated inputs (e.g., optoisolated inputs
IN1 through IN8 in Figure 7.1) for the different SEL-351 Relay models. The figures show
examples of energized and deenergized optoisolated inputs and corresponding Relay Word bit
states. To assert an input, apply rated control voltage to the appropriate terminal pair (see
Figure 1.2 through Figure 1.5 and Figure 2.2 through Figure 2.5).
Figure 7.1 is used for following discussion/examples. The optoisolated inputs in Figure 7.2 and
Figure 7.3 operate similarly.
Summary of Contents for SEL-351
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