Rockwell Automation 1771-IFE ANALOG INPUT MODULE - Manual (Page 63)

Appendix
B
Publication 1771Ć6.5.115 - February 1999
Differences Between Series A
and B Modules and Series C
Modules
The following is a list of the major differences between the Series A
and B 1771-IFE modules and the series C 1771-IFE module
Figure B.1
Differences Between 1771ĆIFE Series A and B and 1771ĆIFE
Series C Modules
Feature Series A, and B Series C
Indicator lights 1. At power-up, the green run indicator
comes on and stays on.
2. Limited to 3 bits of diagnostic
information
1. At powerup, the green run indicator blinks until a
configuration BTW is received. After a configuration BTW
is received, the green indicator stay on.
2. Has 6 bits of diagnostic information representing 6
possible faults.
Input Data Input clamped at range ends. Will not go
above or below range limits.
Returns input data above and below the range end points. For
example, a 1-5V input with default scaling will return all values
between +5.2V. Jumper settable for Series A and B simulation
to internally limit input to range end points.
Default Scaling Allows default scaling with both maximum and minimum
scaling values as zero. No scaling error will be reported.
Block Transfer Lengths Maximum block transfers lengths of 20
words for BTR and 37 words for BTW.
Default length of 0 words.
Maximum block transfers lengths of 22 words for BTR and 39
words for BTW (due to autocalibration). Default length of 0
words (same as series A).
Configuration Plugs 24 configuration plugs to set on 3 row
headers.
16 configuration plugs to set on eight 2 row headers.
Compatibility The series A and B modules are compatible
with the 1771ĆAL PLC local adapter.
The series C module is not compatible with the 1771ĆAL PLC
local adapter.
Calibration Procedures Used jumpers and potentiometers to adjust
10V reference and null input offset.
Uses precision voltage source to supply voltage and a block
transfer to set offset and gain.
Agency Approvals Series A module not CE certified. Series B
module CE certified.
Series C module CE certified.