Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 329)

Appendix
G
Publication 2755-833
Output Module Applications
Figures G.1 through G.3 show typical output module applications.
Outputs are open when power is first applied to the decoder (during
initial diagnostics) and again when the decoder is powered off.
DC Output Module Application
Figure G.1 illustrates a typical DC output module application. When
using high impedance loads, you may have to add an additional
resistor (R) in parallel with the load. Select a value for R that
maintains a minimum current of 10mA through the output module in
the closed state. Typical R values range from 300 to 6,000 ohms
depending on the source voltage.
Figure G.1 DC output module application
– 4 +
Fuse
Connector Block
Enclosure
Conduit Hole
DC Output Module➀
MOD 1-8
➀ Output module functions as switch, not a power source.
DC Source 3-60 VDC
R
Load
– +
Note: For highly inductive or capacitive loads, make sure that the
current does not exceed the maximum ratings of the fuse or module.
You can use a diode to protect the module. See Figure G.3.