Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual User Manual
Page 16
1–2
Overview of the High Resolution Isolated Analog Modules
Publication 1771ĆUM127B-EN-P - December 2002
The modules have either four or eight channels, each electrically
isolated from each other and from the backplane. Input and output
terminations are made through prefabricated cables which connect to
remote termination panels (RTP). The modules are compatible with
all 1771-A1B, A2B, A3B, A3B1, A4B, and later 1771 universal
I/O chassis. In addition, they can be used in 1771-AM1, and -AM2
chassis.
The analog modules are comprised of modular analog signal
conditioning blocks that are plugged into a common circuit board.
These signal conditioning blocks provide the following:
•
4–20mA output range
•
0–50mA output range
•
+10V output (scalable +5V, 0-5V, 0-10V, etc.)
•
thermocouple input (+
100mV)
•
+5V input (+20mA with resistor RTP)
•
+10V input (+20mA with resistor RTP)
•
4–20mA input with sourcing/sinking input
•
1–650 ohm RTD input
Your particular module may have a combination of the above
conditioning blocks.
The N-Series analog modules feature:
•
scaling of data to engineering units
•
self-calibration (external reference required)
•
software configuration
•
user-selectable high and low alarms with deadband (hysteresis)
•
self diagnostics
•
input open circuit detection
•
programmable ramped outputs
Specific analog modules have these additional features:
•
Thermocouple input channels
–
input channels configurable for thermocouple input ranges —
Types B, E, J, K, R, S and T thermocouples (1771-NT2 also
includes types C and N)
–
cold junction compensation
–
scaling to selected temperature range in
o
C or
o
F
–
temperature resolution —
up to 0.03
o
C/0.06
°F (E, J, K, T, N)
up to 0.1
o
C/0.2
°F (B, R, S)
up to 0.07
o
C/0.1
°F (C)
–
millivolt resolution up to 1 microvolt
Features of the High
Resolution Isolated
Analog Series Modules