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DIS876
POTENTIOMETER POSITION INPUT
PROCESS INDICATORS
FEATURES
 | Provides 3 1/2 Digit Digit Display, Red or Green LEDs |
| Display Calibrated in Engineering Units (%, gph, klb, etc.) Proportional to a Potentiometer Position Input |
| Potentiometer Values from 100 ohms to 100 kilohms |
| Fully Isolated Output and/or 0, 1, or 2 Alarms |
| Alarm Setpoints Adjustable Without Disturbing Transmitter Output |
| Fail-safe Alarm Operation |
| LED Alarm Status Indicator |
| Adjustable Deadband |
| Unlimited* Choice of Input/Output Ranges |
| Fits Standard 1/8 DIN Cutout |
| Splashproof Front Panel |
| Rated NEMA-4X, Splashproof and Corrosion Resistant When Properly Installed |
| 5 + 5 Year Warranty |
DESCRIPTION
The DIS876 provides a display, optional isolated DC output voltage or
current proportional to the slide position of a potentiometer, and optional
alarm setpoints. The units include filtering and conditioning to reduce
susceptibility to transients and noisy operations as well as a stable 1 V power
supply to excite the potentiometer. Any value potentiometer from 100 ohms to 100
kilohms can be used. 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 they 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 output voltage or current.
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.
TYPICAL APPLICATIONS
Tank level, valve or actuator position indication, control, monitoring, data
acquisition and warning, creating and displaying test signals.
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 POTENTIOMETER RESISTANCE
any range from 100
ohms to 100 kilohms
INPUT SPAN ADJUSTMENT
70% to 100% of pot rotation
INPUT OFFSET ADJUSTMENT
0 to 25%
of pot rotation
INPUT IMPEDANCE
>10 megohms
EXCITATION
1 V, 10 mA max
load
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
1 sec
typical
ISOLATION
Output/Input
>500 megohms
Breakdown
Voltage
>600 VAC rms
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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).
TERMINAL CONNECTIONS
Output - (Optional)
Output + (Optional)
Potentiometer Excitation
Potentiometer
Wiper
Potentiometer Common
Shield
(Common)
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
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(Terminals
Labeled)
1
2
3
4
5
6
7
8
9
10
11
12
13
14 |
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