Specifications

20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786 page: 4
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3401 Manual
Point I/O Stepper Module
Revision 2.0
Chapter 1: Installing the 3401 module
Installation Notes
• Verify that your system’s power supply has adequate reserve current capacity. The 3401 module
requires 85mA @5Vdc
• A maximum of five (5) 3401 modules can be installed in one network base. The cause is a small
voltage drop across each of the 3401 modules, and past five modules, the voltage is too low for a 3401
module to operate. It is possible to add more 3401 modules to the Point I/O base by adding a 1734-
EP24DC to the system.
• Because of their on board microprocessors, the 3401 modules will become warmer than most Point I/O
modules. There is no reason to be concerned and adequate spacing around the Point I/O system to
allow convection cooling is all that is required.
• The 3401 module is not shipped with the 1734-TB (screw clamp) or the 1734-TBS (spring clamp)
mounting base assembly. These parts must be separately ordered from Rockwell Automation.
Installing the Mounting Base
1. Verify that the DIN rail locking screw is in the horizontal position. The mounting base will not attach
to the DIN rail if this screw is in the vertical position.
2. Position the mounting base vertically above any currently installed units, such as an adapter, power
supply, or an existing module.
3. Slide the mounting base down allowing the interlocking side pieces to engage the adjacent module or
adapter.
4. Press firmly until the mounting base snaps onto the DIN rail.
5. To remove the mounting base from the DIN rail, remove the 3401 module, and then use a small
bladed screwdriver to rotate the base locking screw to the vertical position. This releases the locking
mechanism holding the mounting base to DIN rail. Lift the mounting base straight up to remove.
Installing the 3401 Module into the Mounting Base
The 3401 module can be installed before or after Mounting Base has been installed. However, before
installing the module, verify that the Mounting Base is correctly keyed for the 3401 module. If it is not,
use a small bladed screwdriver to rotate the keyswitch on the mounting base until it matches keying on
the 3401 module.
Install the 3401 module by inserting it into the Mounting Base and pressing straight down. The module
will lock into place.
Installing/Removing the Removable Terminal Block (RTB)
A removable terminal block is supplied with the Mounting Base assembly. Pull up on the RTB handle to
remove. This allows the mounting base to be removed and replaced as necessary without removing any
of the wiring. Use the following procedure to reinsert the removable terminal block.
1. Insert the end opposite the handle into the base unit. This end has a curved section that engages with
the wiring base.
2. Rotate the terminal block into the wiring base until it locks itself in place.
3. If an I/O module is installed, snap the RTB handle into place on the module.
WARNING
Disconnect power before attempting to install or remove the 3401 module.