Rockwell Automation Publication 1794-IN049E-EN-P - May 2022
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FLEX I/O 2-input Frequency Modules Installation Instructions
Install Your Frequency Input Module
The FLEX™ I/O 2-input frequency modules mounts on a 1794-TB3G or 1794-TB3G-TB3GS terminal base.
1.
Rotate the keyswitch (1) on the terminal base (2) clockwise to position 1 as required for this type of module.
2.
Make sure that the Flexbus connector (3) is pushed all the way to the left to connect with the neighboring terminal base/adapter.
You cannot install the module unless
the connector is fully extended.
3.
Make sure that the pins on the bottom of the module are straight so that they align properly with the connector in the terminal base.
4.
Position the module (4) with its alignment bar (5) aligned with the groove (6) on the terminal base.
5.
Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism (7) is locked into the module.
Connecting Wiring for the 1794-TB3G and 1794-TB3GS Terminal Base Unit
Connect wiring as shown in
ATTENTION:
During mounting of all devices, be sure that all debris (metal chips, wire strands, and so on) is kept from falling into the module. Debris
that falls into the module could cause damage on power-up.
WARNING:
If you remove or insert the module while the backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous
location installations. Be sure that power is removed or the area is nonhazardous before proceeding.
ATTENTION:
To reduce susceptibility to noise, power analog modules and digital modules from separate power supplies. Do not exceed a length of 3
m (9.8 ft) for DC power cabling.
ATTENTION:
Do not daisy chain power or ground from this terminal base unit
to any AC or DC digital module terminal base units
.
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