:: Signal Isolators / Convertors
- Time Proven
High Precision Electronic Design
- Manufacturing
& Supplying since last 14 years
- Accuracies
upto 0.1% also achievable
- Opto &
Galvanic Isolators
- ???? of 1500V
DC
- Input : Predefined
- O/P : Predefined,
Max 4 nos.
- Lan incorporate
Non-Standard Signal I/P <-
O/P
- Display /
Bar graph facility optional
- 230V AC /
110V AC / 24V DC
- DIN RAIL
& WALL mount enclosure
- Supplying
to the most reputed names like ABB, Alstan, GAIL, Grasim, Dept.
of Atomic Energy, Atomic Power Stations and many others
- Totally service
/ maintenance free

>
Introduction
::
Pantech's
Signal Isolator, model 821
is an ideal instrument for providing isolation between input, multiple
outputs and power supply. The module is an ideal choice when fanning
out of process signal is required. It provides up to four output
signals, each capable of driving of 800 ohms. All these outputs
are isolated from each other, input and power supply. This ensures
isolation between various subsystems and protects the system from
all grounding problems.
The
module accepts variety of inputs. It accepts a current input of
4 – 20mA DC from two wire transmitters. The unique design
of the module requires only one single positive barrier at the input
from a two-wire transmitter for intrinsic safety and isolates the
control room. The module also accepts T/C and RTD signals. The cold
junction compensation is built in and up scale burn out is provided
as standard features for thermocouple input ranges.
Model
821 is also equipped with an optional 3-½ digit seven segments
LED display for process indication in percentage or engineering
units. It is also facilitated with internal transmitter power supply
of 24 V DC, to power up two-wire transmitters.
Low
drift precession components are used for long term accuracy of the
instruments. All instruments undergo a burn-in for better reliability.
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Specifications
::
Input
1) Current, 4 - 20 mA DC/ 0 - 20 mA DC
2) Voltage, 1 - 5 V DC/ 0 - 10 V DC
3) RTD Pt 100
4) T/C Type J, K, R, S, T.
Input impedance
200 K for
Voltage, mV & T/C inputs
250 for
current inputs
Cold
junction compensation
Built
in for T/C input.
Isolation
Between input, each of outputs and power supply
Analog output
1) Isolated 4 - 20 mA DC / 0 - 20 mA DC
2) Isolated 1 - 5 V DC / 0 - 5 V DC
Analog output
load capability
800 maximum
for current o/p.
|
Output
accuracy
+/- 0.25% of span
Display accuracy
+/- 0.1% of span
Transmitter
power
24 V DC for current inputs
Power supply
1) 24 V DC
2) 110 V AC, 50 Hz, +/- 10%
3) 230 V AC, 50 Hz, +/- 10%
Power consumption
6 VA max.
Ambient temperature
0 - 50° C.
Storage
temperature
0 - 70° C.
Humidity
90% RH (non-condensing)
|
Please
have a look at the following table to understand the availability
of different sizes.
Mounting |
Dimension |
Inputs
|
Power |
Isolated
Outputs |
Indication
Options |
Display
Size |
Type
of o/p |
Np.
of o/p |
Display
Resolution |
Bar graph |
Panel |
96
* 48 * 110 |
All |
24V
DC |
All |
Max.
1 |
3½
digit
|
21
LED's |
¼"
size |
Din |
75
* 22 * 110 |
All |
24V
DC |
All |
Max.
1 |
- |
- |
- |
75
* 45 * 110 |
All |
24V
DC |
All |
Max.
2 |
3½
digit
|
- |
¼"
size |
75
* 70 * 110 |
All |
24V
DC |
All |
Max.
4 |
- |
- |
- |
70
* 60 * 110 |
All |
All |
All |
Max.
2 |
- |
- |
- |
70
* 100 * 110 |
All |
All |
All |
Max.
4 |
- |
- |
- |
Wall |
195
* 70 * 115 |
All |
All |
All |
Max.
4 |
- |
- |
- |
EURO |
130
* 20 * 120 |
All |
24V
DC |
All |
Max.
2 |
- |
- |
- |
|