The VW3A3E302 is a Modbus Plus communication card for Altivar drives, providing a 1 Mbps network connection via a 9-way female SUB-D connector. It supports messaging for the Modbus CiA 402 profile, I/O profile, global data (8 I/O), and peer cop, with adjustable communication monitoring. The front panel carries a single LED for MB+ status indication and a graphic display terminal showing control word received, I/O data, and reference received.
The 1 Mbps transmission rate matches the native speed of Modbus Plus networks — no speed negotiation or auto-sensing; the network must be configured for that rate. The 9-way female SUB-D connector is the standard physical interface for Modbus Plus cabling; verify the cable assembly uses the correct pinout (typically pins 1 and 2 for data, pin 5 for shield). The addressing range of 1 to 64 nodes means this card can participate in a full Modbus Plus segment without address restrictions.