Rockwell Automation 4100 ALEC AXIS LINK ENCODER CONVERTER - Manual (Page 28)

Publication 4100-5.3 - June 1999
20 Installation & Hook-Up
Connecting a Registration
Sensor The ALEC provides a high-speed optically isolated registration input.
If required in your application, this input can be used to latch the
position of the encoder when the registration sensor is activated. The
registration input requires 2.5 mA at 5V DC or 24V DC to operate.
If you are using a current sinking proximity switch, registration sensor,
or active-low encoder marker, connect it to the ALEC and an
appropriate power supply as shown in the following diagram.
Figure 2.5 Current-sinking Registration Sensor
If you are using a current sourcing proximity switch, registration
sensor, or active-low encoder marker, connect it to the ALEC and an
appropriate power supply as in the following diagram.
IMPORTANT
Do not use the relatively noisy machine 24V power
supply for the registration input. For best results, use a
separate power supply just for the registration sensor.
5V
24V
-
*Use 5V terminal and 5V power supply for 5V sensors.
Use 24V terminal and 24V power supply for 24V sensors.
Recommended cable is Belden 9501 or equivalent.
*
Supply
Output
Common
Power
Supply
−
+
Current-sinking
Registration
Sensor