Winco DSE7300 Series - Manual (Page 10)

DSE Model 7000 Series Control and Instrumentation System Operators Manual
10 Part No. 057-074 7000 Series OPERATING MANUAL ISSUE 5 15/10/2009 ADM
3.6 GENERATOR CURRENT SENSING
Measurement type
True RMS conversion
Sample Rate 5KHz or better
Harmonics Up to 10
th
or better
Nominal CT secondary rating 1A or 5A (5A recommended)
Maximum continuous current 5A
Overload Measurement 3 x Nominal Range setting
Absolute maximum overload 50A for 1 second
Burden 0.5VA (0.02
Ω
current shunts)
common mode offset ±2V peak plant ground to CT common terminal
Resolution 0.5% of 5A
Accuracy ±1% of Nominal (1A or 5A) (excluding CT error)
3.7 INPUTS
3.7.1 DIGITAL INPUTS
Number
DSE7200 6
DSE7300 8
Arrangement Contact between terminal and ground
Low level threshold 2.1V minimum
High level threshold 6.6V maximum
Maximum input voltage +50V DC with respect to plant supply negative
Minimum input voltage -24V DC with respect to plant supply negative
Contact wetting current 7mA typical
Open circuit voltage 12V typical
3.7.2 ANALOGUE INPUTS
Oil Pressure
Measurement type
Resistance measurement by measuring voltage across sensor with a fixed current
applied
Arrangement Differential resistance measurement input
Measurement current 15mA
Full scale 240
Ω
Over range / fail 270
Ω
Resolution 1-2 PSI / 0.1 Bar
Accuracy ±2% of full scale resistance (±4.8
Ω
) excluding transducer error
Max common mode voltage ±2V
Display range 0-200 PSI / 13.7 bar subject to limits of the sensor
Coolant Temperature
Measurement type
Resistance measurement by measuring voltage across sensor with a fixed current
applied
Arrangement Differential resistance measurement input
Measurement current 10mA
Full scale 480
Ω
Over range / fail 540
Ω
Resolution 1
°
C, 2°F
Accuracy +/-2% of full scale resistance (±9.6
Ω
) excluding transducer error
Max common mode voltage ±2V
Display range 0
°
C -140
°
C, 32°F - 284°F Depending on sensor