CHAPTER 7: TESTING
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
7–9
7.2.7
Digital Inputs and Trip Coil Supervision
The digital inputs and trip coil supervision can be verified easily with a simple switch or
pushbutton. Verify the 24 V DC with a voltmeter. Perform the steps below to verify
functionality of the digital inputs.
Z
Open switches of all of the digital inputs and the trip coil supervision
circuit.
Z
View the status of the digital inputs and trip coil supervision in the
A1
STATUS
ZV
DIGITAL INPUTS
menu.
Z
Close switches of all of the digital inputs and the trip coil supervision
circuit.
Z
View the status of the digital inputs and trip coil supervision in the
A1
STATUS
ZV
DIGITAL INPUTS
menu.
7.2.8
Analog Inputs and Outputs
The specification for analog input and analog output accuracy is
±
1% of full scale. Perform
the steps below to verify accuracy. Verify the Analog Input +24 V DC with a voltmeter.
4 to 20 mA Inputs:
Z
In the
S11 ANALOG I/O
ZV
ANALOG INPUT 1
menu, set:
ANALOG INPUT 1:
“4-20 mA”
ANALOG INPUT 1 MINIMUM:
“0”
ANALOG INPUT 1 MAXIMUM:
“1000” (repeat all for Analog Inputs 2 to 4)
Analog output values should be
±
0.2 mA on the ammeter. Measured analog input
values should be
±
10 units.
18.73
Ω
250°C
482°F
Applied
Resistance
10
Ω
Copper
Expected RTD
Temperature Reading
Measured RTD Tempeature
Select One: ____°C ____°F
°C
°F
1
2
3
4
5
6
7
8
9
10
11
12
Input
Expected Status
(Switch Open)
4
Pass
8
Fail
Expected Status
(Switch Closed)
4
Pass
8
Fail
Access
Open
Shorted
Breaker Status
Open
Shorted
Assignable Input 1
Open
Shorted
Assignable Input 2
Open
Shorted
Assignable Input 3
Open
Shorted
Assignable Input 4
Open
Shorted
Assignable Input 5
Open
Shorted
Assignable Input 6
Open
Shorted
Assignable Input 7
Open
Shorted
Trip Coil Supervision
No Coil
Coil