7.32
SEL-311C Relay Instruction Manual Date Code 20060320
Inputs, Outputs, Timers, and Other Control Logic
Output Contacts
Output Contacts
Figure 7.27 and Figure 7.28 show the example operation of output contact
Relay Word bits due to:
➤ SELOGIC control equation operation
or
➤ PULSE command execution
The output contact Relay Word bits in turn control the output contacts.
Alarm logic/circuitry controls the ALARM output contact (see Figure 7.27).
Figure 7.27 is used for the following discussion/examples. The output
contacts in Figure 7.28 operate similarly.
Factory Settings
Example
In the factory SELOGIC control equation settings, four output contacts are
used:
OUT101 = TRIP (overcurrent tripping/manual tripping; see Section 5: Trip
and Target Logic)
OUT102 = TRIP
OUT103 = CLOSE (automatic reclosing/manual closing; see Section 6: Close
and Reclose Logic)
OUT104 = KEY (POTT key permissive trip; see Section 5: Trip and Target
Logic)
·
·
·
OUT107 = 0 (output contact OUT107 not used—set equal to zero)
Operation of Output
Contacts for Different
Output Contact Types
Output Contacts OUT101 Through OUT107
Refer to Figure 7.27.
The execution of the serial port command PULSE n (n = OUT101 through
OUT107) asserts the corresponding Relay Word bit (OUT101 through
OUT107) to logical 1. The assertion of SEL
OGIC control equation setting
OUTm (m = 101 through 107) to logical 1 also asserts the corresponding
Relay Word bit OUTm (m = 101 through 107) to logical 1.
The assertion of Relay Word bit OUTm (m = 101 through 107) to logical 1
causes the energization of the corresponding output contact OUTm coil.
Depending on the contact type (a or b), the output contact closes or opens as
demonstrated in Figure 7.27. An a type output contact is open when the output
contact coil is de-energized and closed when the output contact coil is
energized. A b type output contact is closed when the output contact coil is de-
energized and open when the output contact coil is energized.
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