ABB 3HAC7344-1 Mains line filter unit

Beginning with optimum mechanical alignment, adjust for optimum optical alignment as described in steps 1 through 6. This procedure assumes use of the SMBLS mounting bracket. 1. Loosen the two bolts holding the two parts of the bracket together just enough to allow the upper (carriage) bracket along with the emitter to be rotated about the emitter's vertical axis. 2. Slightly loosen the mounting bolts in the curved slots of the base bracket, which will allow the SMBLS bracket to be tipped side-to-side

With power applied to both units

tip the entire SMBLS bracket slightly from side-to-side. a. Find the extremes of movement between which the receiver's red indicator LED remains OFF. b. Secure the base bracket at the point midway between the extremes. 4. Rotate the carriage bracket (to which the emitter is attached) slightly in both directions about the emitter's vertical axis. a. Find the extremes of bracket rotation between which the receiver's red indicator LED remains OFF. b. Secure the emitter midway between the extremes by tightening the two bolts that lock the two parts of the SMBLS bracket together. 5. Loosen the two mounting bolts that hold the emitter to the carriage bracket. a. Slide the emitter up and down vertically in the bracket, noting the extremes between which the receiver's red LED indicator remains OFF. b. Tighten the bolts to secure the emitter midway between the extremes.

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