Rockwell Automation 4100 ALEC AXIS LINK ENCODER CONVERTER - Manual (Page 30)

Publication 4100-5.3 - June 1999
22 Installation & Hook-Up
making them more susceptible to interference. For these devices, the
ON current can be raised by a shunt resistor across the registration
input, as shown in the following diagram.
Figure 2.7 ALEC Terminal Block
This resistor increases the current drawn from the registration sensor
to over 50mA. If your registration sensor can handle more ON current,
you can use a lower resistance value, but be sure to check the power
dissipation of the resistor.
In severe cases, it may also be necessary to use an isolated power
supply only for the registration inputs. With 24V devices, do not use
the relatively noisy machine or I/O power supply.
Power Supply Connector
The power supply connector is used to connect power to the ALEC.
There is one power input connector for the ALEC. The input power is
used to operate the ALEC and attached transducers.
The ALEC operates within the voltage range of 18-36V DC. The power
source must be able to supply at least 12W of power continuously.
IMPORTANT
Where high levels of repetitive noise is unavoidable,
Normally Closed sensors can offer improved immunity.
24V
-
ALEC
AxisLink
Terminal Block
Normal 24V
Registration
Connections
470
,
2W