GBB/GIB Series Non-spring Return, 24 Vac, Modulating Control
Technical Instructions
Document Number 155-176P25
June 22, 2015
Siemens Industry, Inc.
Page 13
Reversing the Position
Indicator
Reverse the position indicator so that the counterclockwise 0 to 90 scale is visible.
See
Figure 27.
Figure 27. Position Indicator.
Wiring
All wiring must conform to NEC and local codes and regulations.
Use earth ground isolating step-down Class 2 transformers. Do not use
autotransformers.
The maximum rating for a Class 2 step-down transformer is 100 VA. Determine the
supply transformer rating by summing the VA ratings of all actuators and all other
components used. It is recommended that one transformer power no more than 10
actuators (or 80% of its VA).
WARNINGS:
•
Mixed switch operation is not permitted to the switching outputs of both
auxiliary switches (A and B).
•
Either AC line voltage from the same phase must be applied to all six
outputs of the dual auxiliary switches, or UL-Class 2 voltage must be
applied to all six outputs.
NOTE:
With plenum cables, only UL-Class 2 voltage is permitted.
CAUTION:
Do not parallel wire GBB/GIB with any other type of actuator, including
GBB/GIB actuators with date codes earlier than 501
.
