Preparing the EAS for Mounting

Short shaft applications

NOTE: The short shaft adapter is included in the packing box with the shaft adapter.

With the short shaft adapter in place, align the notch of the EAS over the protruding tab on the position adapter ring and secure in place. (See Figure 7).

Short Shaft

Adapter

EA1178R1

Figure 7. Attaching EAS to GCA/GIB/GBB Shaft Adapter.

2.On the back of the EAS, push the plastic inserts into the mounting holes. (See Figure 8 and Figure 9).

3.Mount the position indicator on the face of the EAS (See Figure 8 step 2 and Figure 9, step 2).

Document No. 129-420

Installation Instructions

December 13, 2004

EA1181R1

Figure 9. For GCA, GBB, GIB Actuators, Use the Bottom

Screw Holes.

Mounting External Auxiliary Switch to Actuator

1.Nest the alignment peg of the EAS position adapter ring into the notch (See Figure 10).

The EAS lies flush against the face of the actuator.

Note: GMA/GEB actuators use top screw holes, GCA, GBB/GIB models use bottom screw holes.

EA1182R1

9.5 ± 1.5 lb-in (1.1 Nm ± 0.2)

EA1183R1

Figure 10. Bringing the EAS and the Actuator together.

2.Secure the EAS in place with the M5×25 screws provided. (See Figure 10).

CAUTION:

Figure 8. For GMA/GEB Actuators, Use Top Screw Holes.

Siemens Building Technologies, Inc.

The EAS should not shift when it is correctly installed firmly against the face of the actuator.

The installation is complete.

Page 3 of 5

ASC77.2U specifications

The Siemens ASC77.2U is a state-of-the-art automation and control system designed to meet the growing demands of industrial processes in various sectors. This advanced system is renowned for its reliability, scalability, and adaptability, making it a vital component for modern factories and plants.

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