Allen-Bradley A-B QUALITY DL20 Series User Manual page 169

Parallel Interface
Connections
The following connections are applicable to the program examples shown
previously.
The standard voltage levels required for the DL20 parallel port are 5 to 30
VDC. When using DC Output Modules, an external power supply of the
appropriate voltage level and current capacity is required.
AC Output Modules can be used, however, these applications require one of
the Parallel Input Converters as described below. The need for an external
DC power supply is eliminated.
2706-NG1 - Display Mounted 120VAC Parallel Input Converter.
2706-NG2 - Panel Mounted 120VAC Parallel Input Converter.
Figure G.5 shows connections between a parallel Input Converter and AC
Output Module (Catalog No. 1771-OA).
Figure G.6 shows connections between a DL20 and DC Output Modules
(Catalog No. 1771-OB or -OG)
Figure G.7 shows connections between a DL20 and High Density Output
Module (Catalog No. 1771-OBD).
Appendix G
Application Notes
G–17