Rockwell Automation 2706-DXX Dataliner Message Display DL5 Series - Manual (Page 62)

2706-UM001A-US-P
7-12 Using the Parallel Port
Determining Current Requirements For DC Outputs
You must check to make sure that the DC outputs supplying the parallel port
can supply enough current to handle the requirements of the DL5’s parallel
port. The table below lists the current requirements for one DL5 parallel
port input.
Parallel Port Typical Requirements for DC Outputs
To determine the total current requirements of the parallel port, multiply the
number of inputs being used by the value found in the above table. For
example: Assume that you are using 24 VDC outputs:
Each input will draw a peak current of 14.6 milliamperes. If you are
using all sixteen inputs, your output source must be able to provide 234
milliamperes of current (16 x 14.6 mA = 234 mA).
The table below lists the voltage and current requirements, per DL5 input,
for various Allen-Bradley output devices.
Voltage and Typical Current Requirements Per DL5 Input
5V DC Input 12V DC Input 24V DC Input
3.0 mA 7.3 mA 14.6 mA
Output Type Input Voltage Input Current
1771-OB 12 or 24V DC 7.3 or 14.6 mA
1771-OBD 12 or 24V DC 7.3 or 14.6 mA
1771-OW 24V DC 14.6 mA
1746-OB 12 or 24V DC 7.3 or 14.6 mA
1746-OV 12 or 24V DC 7.3 or 14.6 mA
1746-OG 5V DC 3.0 mA