Siemens ASC77.2U User Manual
Installation Instructions
Document No. 129-420
December 13, 2004
OpenAir™ External Auxiliary Switch
a
b
c
d
e
f
g
EA1
175R1
a. External dual auxiliary switch
b. Position
indicator
c. GCA/GBB/GIB position adapter
d. GMA/GEB position adapter
e. 3 mm hex key
f. Plastic mounting adapter inserts (2)
g. Threaded M5 × 25 screws (2)
Figure 1. External Auxiliary Switch Kit Contents.
Product Description
The OpenAir External Auxiliary Switch (EAS) provides
switch functionality for standard model damper actuators
with easy installation for in-service units.
switch functionality for standard model damper actuators
with easy installation for in-service units.
Product Number
ASC77.2U
Specifications
Dual Auxiliary Switches
24 Vac to 250 Vac
AC 6A resistive
AC 6A resistive
AC rating
AC 2 FLA, 12 LRA
12 Vdc to 30 Vdc
12 Vdc to 30 Vdc
DC rating
DC 2A
Insulation system
Double insulated
Switch range
Switch
Switch
A
0° to 90° with 5° intervals
Recommended
usage
0° to 45°
Switch B
0° to 90° with 5° intervals
Recommended
usage
usage
45° to 90°
Switching hysteresis
2°
UL listed to UL 873
cUL certified to Canadian
Standard C22.2
No. 24-93
Electromagnetic
compatibility 89/336/EEC
UL listed to UL 873
cUL certified to Canadian
Standard C22.2
No. 24-93
Electromagnetic
compatibility 89/336/EEC
Agency certification
Low voltage directive
73/23/EEC
73/23/EEC
Conduit Connection
Threaded 1/2-inch
NSPT, flex only
NSPT, flex only
Shipping Weight
1.1 lb (0.48 kg)
Warning/Caution Notations
WARNING:
Personal injury/loss of life
may occur if you do not follow
the procedures as specified.
may occur if you do not follow
the procedures as specified.
CAUTION:
Equipment damage, or loss of
data may occur if you do not
follow the procedures as
specified.
data may occur if you do not
follow the procedures as
specified.
Required Tools
Phillips screwdrivers
No. 2 for screws, No. 1 for adjustment
No. 2 for screws, No. 1 for adjustment
Expected Installation Time
15 minutes
Prerequisites
CAUTION:
Remove power from in-service damper
actuator before installing external
auxiliary switch.
actuator before installing external
auxiliary switch.
WARNING:
Do not open the external auxiliary switch.
EA1
191R1
ASK75.3U
or
ASK75.1U
ASK75.3U
or
ASK75.1U
Figure 2. NEMA Type 3R Rating Only
With Use of Weather Shield.
Item Number 129-420, Rev. 010
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