DIS873
RTD INPUT
PROCESS INDICATORS
FEATURES
 | Provides 3 1/2 Digit, Red or Green LEDs |
| Display Calibrated in Engineering Units (°C,°F,°K, etc.) Proportional to an RTD Input |
| 3-Wire or 2-Wire, 10 ohms to 2000 ohms RTDs |
| Linearized for Platinum RTDs |
| 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 |
| Rated NEMA-4X, Waterproof and Corrosion Resistant When Properly Installed |
| 5 + 5 Year Warranty |
DESCRIPTION
The DIS873 provides a display, optional isolated DC output voltage or
current proportional to an RTD 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 a 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
Temperature indication, control, monitoring, data acquisition and warning for
HVAC, pumps, motors, etc.
MOUNTING
The DIS is designed to be mounted from the front of a panel through a standard
horizontal 3.62 x 1.77 (1/8 DIN) cutout. Two mounting cam-screws secure the DIS
to the panel.
SPECIFICATIONS
RTD INPUT
3-Wire or
2-Wire
10 ohms to 2000
ohms
INPUT RANGE
select any range within RTD limit
[min span 25°F/14°C]
EXCITATION CURRENT
10 ohms
100 ohms
1000 ohms
2000 ohms
|
10 mA
5 mA
0.5 mA
0.2 mA
|
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)
OPEN SENSOR OUTPUT
>= full
scale
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
(range
dependent)
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
(Pt RTD, output vs
temp)
±0.05% of span
(temp > = 32°F/0°C)
±0.15% of
span
(temp <
32°F/0°C)
(others, output vs res)
±0.01%
(display)
±0.05% (transmitter
output)
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)
NC
RTD Input
+
RTD Input
-
RTD Lead
Compensation
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
|
(Terminals
Labeled)
1
2
3
4
5
6
7
8
9
10
11
12
13
14 |
|
