C4 User Manual
October 25, 2021 ©2021 Smartrise Engineering, Inc. All Rights Reserved Page 11
2.1.4 Drive Communication
The drive communication connector is for transmitting and receiving signals to and from the
drive (the type of drive is dependent on the application) as well as triggering the Normal
Terminal Stop (NTS) operation.
Figure 12: Drive Communication Connector
RX And TX Terminals – Communication line to and from the drive. When O46 LED is lit, it
indicates the activity of the NTS signal.
REF Terminal – A shield connection to connect to the drive, as applicable.
See the C4 Controller sheet 02 Machine Room I/O for wiring information.
2.1.5 Network
The network is used for board to board communication between the Machine Room, Car Top,
Car Operating Panel, and Expansion boards.
CN Network Terminals – Uses both CN1 and CN2 for communication.
REF Terminal – Provides a ground to prevent noise on the CN1 and CN2 signals.
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