Winco DSE71xx Series - Manual (Page 8)

DSE Model 71xx Series Control & Instrumentation System Mk2 Operators Manual
8 Part No. 057-113 71xx Series OPERATING MANUAL ISSUE 2 12/08/2010 ADM
3.4 INPUTS
3.4.1 DIGITAL INPUTS
Number
4
Arrangement Contact between terminal and ground
Low level threshold 40% of DC supply voltage
High level threshold 60% of DC supply voltage
Maximum input voltage DC supply voltage positive terminal
Minimum input voltage DC supply voltage negative terminal
Contact wetting current 2.5mA @12V typical
5mA @ 24V typical
Open circuit voltage Plant supply
3.4.2 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 350
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 2k
Ω
(2000
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
Flexible Sensor
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%
Accuracy ±2% of full scale resistance (±9.6
Ω
) excluding transducer error
Max common mode voltage ±2V
Display range 0-250%