1791DS-IB4XOW4 A-B  Servo Controller

The PowerFlex 70 drive is typically used with a three-phase input supply. Underwriters Laboratories (UL) lists the drive to operate on single-phase input power. Single-phase operation provides 50% of the three-phase rated current. See 208/240V AC Single-phase Input Drive Ratings and Input Protection Devices on page 24 through 600V AC Single-phase Input Drive Ratings and Input Protection Devices on page 26. Generator Input Power Contact technical support for details on how to power a drive properly when using generator power. See Rockwell Automation Support on the back cover.

The safety ground for the drive is required by code. This point must be connected to adjacent building steel (girder, joist), a floor ground rod, or bus bar (see Typical Grounding). Grounding points must comply with national and local industrial safety regulations and/or electrical codes. Shield Termination - SHLD The shield terminal (see Typical Power Terminal Block Location (B frame shown) on page 17) provides a grounding point for the motor cable shield. The motor cable shield can be connected to this terminal on the drive (on the drive end) and the motor frame (on the motor end). A shield terminating cable gland can also be used. If you use shielded cable for control and signal wiring, the shield can be grounded at the source end, and not the drive end.

Various cable types are acceptable for drive installations. For many installations, unshielded cable is adequate as long as the cable is separated from sensitive circuits. As an approximate guide, provide a spacing of 0.3 m (1 ft) for every 10 m (32.8 ft) of length. In all cases, do not use long parallel runs. Do not use cable with an insulation thickness fewer than 15 mils (0.4 mm/0.015 in.). Use copper wire. Wire gauge requirements and recommendations are based on 75 °C (167 °F). Do not reduce wire gauge when using higher temperature wire.

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