UG-1091
6QBI
User’s Guide
Copyright © 2021 QEI
6AIP1 Analog Panel Interface
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9
6 6AIP1 Analog Panel Interface
6.1 General
The Analog Panel Interface (J7) samples differential analog input signals that are
wired to the 6AIP1 or 6AMP Analog Input Panels, at any given time one of up to
eight 6AIP1s and one of the sixteen input points in each pane is selected. The
Analog Panel Interface continuously samples in this manner for a total of 128 analog
inputs. The Analog Panel Interface also includes two fixed reference points (
– 2.5
and +2.5 VDC). If these two reference points are used, they must be included as
two of the 128 analog points.
The selected analog input, in the range of 0 to +5 VDC, is digitized by the A/D
converter into a 12-bit signed value (11-bit plus sign). This value is stored in RAM
for further processing and subsequent transmission to the "client".
Unlike the other panel interfaces, where the isolation is done at the panels
themselves, the Analog Panel Interface has its own isolation on board. A DC/DC
converter provides the necessary power supply and isolation for the analog input
panels, while opto-isolators are used to provide isolation for the logic signals.
A 16-pin IDC header, J7, is used for the connections to the analog input panels
(6AIP1 or 6AMP) through a 16-conductor ribbon cable. Signals in this connector
include:
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3 panel select lines
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4 point select lines
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1 enable line
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2
15 VDC isolated power lines
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3 common (analog ground)
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2 analog signal lines
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1 acknowledge line
Additional scaling and measurement ratios are accomplished via software
configuration.
