Expansion Cards The SJ–FB Encoder Feedback Board installs in the inverter’s expansion bay, which can accept up to two expansion cards. The encoder card accepts two-channel incremental encoder signals. Position feedback is essential for certain torque-control algorithms, and is useful for improving low-speed performance. The card can also generate linear acceleration/deceleration ramps for velocity control.
All wiring associated with this card connects to its PWB connectors as shown. Some related signals may be assigned to the intelligent I/O terminals, as described in Chapter 4. For more information, refer to the SJ–FB manual.
The SJ–DG Digital Input Card installs in the inverter’s expansion bay. This card accepts up to eight digital input signals, in addition to the intelligent inputs on the inverter’s control terminal connector. All wiring associated with card connects to its PWB connectors as shown.
PWB connector to external wiring
SJ–FB Encoder Feedback Card
PWB connector to external wiring
SJ–DG Digital Input Card
The SJ–DN DeviceNet Interface Card (not shown) installs in the inverter’s expansion bay. It connects directly to a DeviceNet network. Inverter parameters P044 to P049 configure the card. Only one DeviceNet card may be installed in an inverter. For more information, please refer to the DeviceNet Expansion Card Instruction Manual.