IntelliPack Series 811T Transmitter/Alarm User's Manual DC Voltage/Current Input
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X = 1 with Alarm Relay, X = 0 without Alarm Relay;
5 = Output: Transmitter Voltage or Current;
0 = Enclosure: DIN rail mount;
0 = Approvals: cULus Listed.
INPUT SPECIFICATIONS
Unit must be wired and configured for the intended input type and
range (see Installation Section for details). The following
paragraphs summarize this model’s input types, ranges, and
applicable specifications.
DC (Process) Current:
0-22mA DC and 0-5mA. A precision
24.9
current sinking resistor converts the input current to a
voltage that is processed by the A/D converter. An optional
external AC current sensor is required to monitor AC current
signals (Acromag Model 5020-350). This sensor generates
a low level DC milliampere signal of 0 to 11.17mA for the
module (see Table 2 for scaling to AC current). This module
also provides an excitation supply (15VDC @24mA) for use
with 2-wire transmitters.
Current Input Reference Test Conditions:
4 to 20mA input
using the on-board excitation supply; Ambient Temperature =
25
C; Power Supply = 24VDC; Alarm Delay = 100ms; Output
= 4-20mA, proportional.
Input Overvoltage Protection:
Bipolar Transient Voltage
Suppressers (TVS), 7.6V clamp level typical.
DC Voltage (100:1 Input Divider):
50 to
100V DC;
25 to
50V DC;
12 to
25V DC;
6 to
12V DC;
3 to
6V DC;
1
to
3V DC.
Voltage Input Reference Test Conditions:
-10 to 10V DC
input; Ambient Temperature = 25
C; Power Supply = 24V
DC; Alarm Delay = 100ms; Output = 4-20mA, proportional.
Input Overvoltage Protection:
Bipolar Transient Voltage
Suppressers (TVS), 135V clamp level typical.
General Input Specifications
Input/Alarm Accuracy:
Better than
0.05% of input span.
This includes the effects of repeatability, but not sensor
error. This refers to input and alarm accuracy, but does
not include analog output accuracy (see Table 7).
Accuracy Versus Temperature:
Better than ±0.005% of
input span per
C, or
1uV/
C, whichever is greater.
Resolution:
See Table 6.
Input Response Time:
100ms typical, to 98% of final value
for a step change in the input. This applies to the analog
output. See Relay Response Time for alarm output
response. Note that a software programmable delay can
be implemented for filtering transients and this will
increase the response time.
Input bias current:
±25nA maximum, excluding excitation
current of process current inputs.
Input Filter:
Normal mode filtering, plus digital filtering,
optimized and fixed per input range within the
-
ADC.
Noise Rejection (Normal Mode):
40dB @ 60Hz, typical
with 100
input unbalance (24.9
for process currents).
Noise Rejection (Common Mode):
100dB @ 60Hz, typical
with 100
input unbalance (24.9
for process currents).
Analog to Digital Converter (A/D):
A
16-bit
-
converter,
Analog Devices AD7714AR-5.
Input Conversion Rate:
20 conversions per second.
Input Excitation Supply:
+15V DC typical, current limited to
approximately 24mA. For use with two-wire process
current transmitters.
Input Zero/Span Range Turn-Down (See Table 5):
The
configuration software may be used to calibrate an output
response to input zero & full-scale values that are
subsets of their nominal input ranges. Select input spans
from 10% to 100% of nominal full-scale input range. For
best results, select the smallest input range that contains
the desired zero & full-scale input signal. See Table 5.
Table 5: Input Zero/Full-Scale Span Selection
Nominal Input Range
Selected (Av Gain)
Recommended Input Span
Calibration Range
0-22mA DC (Av=2)
Any Span 2.2mA to 22mA
0-5mA DC (Av=2)
Any Span 0.5mA to 5mA
50 to
100V (Av=1)
Any Span 20V to 200V
25 to
50V (Av=2)
Any Span 10V to 100V
12 to
25V (Av=4)
Any Span 5V to 50V
6 to
12V (Av=8)
Any Span 2.4V to 24V
3 to
6V (Av=16)
Any Span 1.2V to 12V
1 to
3V (Av=32)
Any Span 0.6V to 6V
Table 6: A/D Resolution Per Nominal Input Range
Gain A
V
Input Range
A/D
Resolution
2
0-22mA, 0-24mA Typical
757nA/LSB
2
0-5mA, 0-6mA Typical
757nA/LSB
1
50 to
100V
3770uV/LSB
2
25 to
50V
1880uV/LSB
4
12 to
25V
942uV/LSB
8
6 to
12V
471uV/LSB
16
3 to
6V
236uV/LSB
32
1 to
3V
118uV/LSB
ANALOG OUTPUT SPECIFICATIONS
These units contain an optically isolated DAC (Digital-to-Analog
Converter) that provides a process current or voltage output.
Note that calibration can only occur with respect to one of the
outputs, voltage or current, and only one of the outputs may
operate at a time. A jumper is required bet
ween the output “I+”
and “JMP” terminals for voltage output. Remove this jumper for
current output.
Voltage Output Specifications:
Output Range:
0-10V DC, 0-5V DC.
Output Accuracy:
See Table 7.
Output Current:
0-10mA DC maximum.
Output Impedance:
1
.
Output Resolution:
See Table 7.
Output Short Circuit Protection:
Included
Current Output Specifications:
Output Ranges:
0-20mA DC, 4-20mA DC, or 0-1mA DC.
Output Maximum Current:
21.6mA typical.
Output Accuracy:
See Table 7.
Output Compliance:
10V Minimum, 12V Typical.
Output Resolution:
See Table 7.
Output Load Resistance Range:
0 to 550
, typical.