Allen-Bradley A-B QUALITY DL20 Series User Manual page 174

Appendix H
Parallel Input Converters
Description
Converter Circuit
D0
120 VAC
Common
Converter Circuit
D0
120 VAC
Common
H–2
Figures H.1 and H.2 provide block diagrams of the converter circuits.
Figure H.1
Series A and B Parallel Input Converter Block Diagram
Common
D0
Figure H.2
Series C and Later Parallel Input Converter Block Diagram
Common
+
D0
The Parallel Input Converter is available in two different mounting styles:
Catalog Number 2706–NG1 is a display mounted input converter which
mounts directly to the parallel port terminals 11A through 22. No wiring
between the display and the converter is necessary. With the 2706–NG1
installed, the overall depth of the display is increased by 0.46 inches.
Catalog Number 2706–NG2 is panel mounted and wired to terminals 11A
through 22 of the DL20 parallel port.
Note: A Parallel Input Converter does not fit inside the 2706–NE1 or
2706–NE2 enclosure. If a parallel input converter is used with a display in
one of these enclosures, use a panel–mounted input converter (Catalog
Number 2706–NG2) in a separate enclosure.
Terminals on both input converters are marked identically to the terminals on
the back of the DL20.
Input to DL20
VDC AC Input On
5
0
Input to DL20
VDC AC Input On
5
0
AC Input Off
Time
AC Input Off
Time