GE C30 Instruction Manual page 386

INPUTS/OUTPUTS
DIRECT OUT 1 NAME
DIR OUT 1 OPERAND
5.8.6.3 Application examples
The examples introduced in the earlier Direct Inputs and Outputs section (part of the Product Setup section) are continued
here to illustrate usage of the direct inputs and outputs.
Example 1: Extending input/output capabilities of a UR relay
Consider an application that requires additional quantities of contact inputs or output contacts or lines of programmable
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 figure shows that two
IEDs are connected via single-channel digital communication cards.
5
Assume that contact input 1 from UR IED 2 is to be used by UR IED 1. The following settings are 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
UR IED 2:
DIRECT OUT 12 OPERAND
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.
5-192
DIRECT OUTPUT 1

EVENTS: Disabled
— This setting allows the user to assign a descriptive name to the direct output.
— This sets the FlexLogic operand that determines the state of this direct output.
Figure 5-98: Input and output extension via direct inputs and outputs
= "2"
= "12"
= "Cont Ip 1
On"
Figure 5-99: Sample interlocking busbar protection scheme
Range: Enabled, Disabled
.
DIRECT INPUT 5 ON
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS