DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument

DC Input Process Indicator Model DIS871


CONNECTIONS

 Output - (Optional)
Output + (Optional)
NC
Input +
Input -
Shield
Alarm 1 NC (Optional)
Alarm 1 C (Optional)
Alarm 1 NO (Optional)
Alarm 2 NC (Optional)
Alarm 2 C (Optional)
Alarm 2 NO (Optional)
Power AC L1
Power AC L2		 (Terminal Labeled)

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DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument

DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Catalogue
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Manual


DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument


Features

DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Provides 3 1/2 Digit Display, Red or Green LEDs
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Display Calibrated in Engineering Units (°F,°C, %, PSI, etc.) Proportional to DC Input
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Fully Isolated Output and/or 0, 1, or 2 Alarms (Optional)
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Alarm Setpoints Adjustable Without Disturbing Transmitter Output
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Fail-safe Alarm Operation
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument LED Alarm Status Indicator
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Adjustable Deadband
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument 50 mV or 1 mA Minimum Input Span (10 mV available)
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Unlimited* Choice of Input/Output Ranges
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Wide Range Input Available
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Fits Standard 1/8 DIN Cutout
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument Rated NEMA-4X, Splashproof and Corrosion Resistant When Properly Installed
DC,Input,Process,Indicator,Model DIS871,Wilkerson Instrument 5 + 5 Year Warranty


Description

The DIS871 provides a display, optional isolated DC output voltage or current proportional to a DC input signal, and optional alarm setpoints. The units include filtering and conditioning to reduce susceptibility to transients and noisy operations. The digital display utilizes an auto-zero dual-slope integrating A/D converter for accuracy and stability.

All controls are accessible by removing the gasketed front access panel.  The display controls are wide-ranging so that it can be calibrated to display engineering units. Decimal point selection is made with a switch, also accessible from the front.

A complete set of engineering unit labels is sent with each DIS.  Once the display has been adjusted to read the correct engineering units, the alarm setpoints can be adjusted without test equipment and without disturbing the transmitter output.  Either setpoint may be displayed by use of the SP CAL switch.  Each setpoint has an LED to indicate alarm status. The alarms have adjustable deadbands. Terminations are made to a screw terminal connector on the rear of the case.

The wide-range (WR) DC preamplifier allows a choice of voltage or current input signal selection by the use of an 8-position DIP switch. The choices of full scale inputs are shown below:

Voltage
50 mV
100 mV
500 mV
1 V
1/5 V
5 V
10 V
Current
1 mA
5 mA
10 mA
4/20 mA
20 mA
10/50 mA
50 mA

Typical Applications

DC process indication, control, monitoring, voltage/current scaling, isolation, buffering, noise reduction, driving, DC monitor/current limit, level/position control, HI/LO pressure alarm, power demand warning.

Mounting

The DIS is designed to be mounted from the front of a panel through a standard horizontal 3.62 x 1.77 inches (1/8 DIN) cutout. Two mounting cam-screws secure the DIS to the panel.

Specifications

INPUT RANGE
Voltage
  select any range between ±250 V max
    (min span 50 mV)

Current
  select any range between ±5 A max
    (min span 1 mA, internal shunt)

Low Input (Option S)
  select any range between ±20 V max
    (min span 10 mV)

INPUT IMPEDANCE
Voltage
  200 kilohms

Current

Input
1 mA
10 mA
20 mA
4/20 mA
100 mA
1 A
5 A
Shunt Value
100 OHM
10 OHM
5 OHM
61.9 OHM
1 OHM
0.1 OHM
0.01 OHM

OUTPUT RANGE
Voltage
  select any range between ±10 V
    10 mA max load
    (min span 0.2 V)
Current
  select any range from 0 to 20 mA max
    24 V compliance**
    (min span 1 mA)

RELAY CONTACTS (spdt)
Resistive Load:
  5 A max, 150 W max,
  240 VAC max, 30 VDC max
Inductive Load:
  1/8 HP max at 120/240 VAC

SETPOINT
each alarm 0 to 100% of span

DEADBAND
0.25% to 100% of span

RESPONSE TIME
< = 100 ms

ISOLATION
 Output/Input
  >500 megohms
Breakdown Voltage
  >600 VAC rms

DISPLAY
 Digit Size
  .56 inch LED, 3 1/2 digits, ±1999

Decimal Point
  ±1.9.9.9

Control Range
  Zero
    ±1999
  Span
    min span 10
    max span 2000

Display Update
  3/sec

ACCURACY
±0.1% of span

LINEARITY
Display
  ±0.01% of span

Output
  ±0.025% of span

OUTPUT RIPPLE
 <0.1% of span
  (peak to peak)

COMMON MODE REJECTION
120 dB, DC to 60 Hz

OPERATING TEMPERATURE
 14°F to 140°F
-10°C to 60°C

TEMPERATURE STABILITY
±(0.02% of span +30 µV)/°C max

POWER
 115 VAC ±10%, 50/60 Hz
  (4 W max)
230 VAC ±10%, 50/60 Hz
  (4 W max)

* Within specified range limits.

** Compliance:  The sum of the voltage drops in the output loop cannot exceed 24 V at rated current 
    (1200 ohms at 20 mA).



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