GE L60 Instruction Manual page 337

5 SETTINGS
b) DIRECT OUTPUTS
PATH: SETTINGS INPUTS/OUTPUTS
DIRECT OUTPUT 1
MESSAGE
MESSAGE
The setting allows the user to assign a descriptive name to the direct output. The
DIRECT OUT 1 NAME
the FlexLogic™ operand that determines the state of this direct output.
c) APPLICATION EXAMPLES
The examples introduced in the earlier Direct Inputs/Outputs section (part of the Product Setup section) direct inputs/out-
puts are continued below to illustrate usage of the direct inputs and outputs.
EXAMPLE 1: EXTENDING INPUT/OUTPUT CAPABILITIES OF A L60 RELAY
Consider an application that requires additional quantities of digital inputs and/or output contacts and/or lines of program-
mable logic that exceed the capabilities of a single UR-series chassis. The problem is solved by adding an extra UR-series
IED, such as the C30, to satisfy the additional inputs/outputs and programmable logic requirements. The two IEDs are con-
nected via single-channel digital communication cards as shown below.
Figure 5–126: INPUT/OUTPUT EXTENSION VIA DIRECT INPUTS/OUTPUTS
Assume contact input 1 from UR IED 2 is to be used by UR IED 1. The following settings should be applied (Direct Input 5
and bit number 12 are used, as an example):
UR IED 1:
DIRECT INPUT 5 DEVICE ID
DIRECT INPUT 5 BIT NUMBER
The operand of UR IED 2 is now available in UR IED 1 as
Cont Ip 1 On
EXAMPLE 2: INTERLOCKING BUSBAR PROTECTION
A simple interlocking busbar protection scheme can be accomplished by sending a blocking signal from downstream
devices, say 2, 3 and 4, to the upstream device that monitors a single incomer of the busbar, as shown in the figure below.
Figure 5–127: SAMPLE INTERLOCKING BUSBAR PROTECTION SCHEME
GE Multilin
DIRECT OUTPUTS
DIRECT OUT 1 NAME:
Dir Out 1
DIRECT OUT 1 OPERAND:
Off
DIRECT OUTPUT
EVENTS: Disabled
UR IED 1
UR IED 2
= "2"
= "12"
UR IED 2 UR IED 3
L60 Line Phase Comparison Relay
DIRECT OUTPUT 1(32)
Range: up to 12 alphanumeric characters
Range: FlexLogic™ operand
Range: Enabled, Disabled
1
TX1
RX1
TX1
RX1
UR IED 2:
DIRECT OUT 12 OPERAND
.
DIRECT INPUT 5 ON
UR IED 1
BLOCK
UR IED 4
842712A1.CDR
5.7 INPUTS/OUTPUTS
is
DIR OUT 1 OPERAND
= "Cont Ip 1 On"
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