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OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

November 5, 2012

Control Signal

Adjustment

GCA 163 and GCA164

The offset (start point) and span of the control signal can be adjusted. The offset,

Uo, can be adjusted between 0 to 5 Vdc. The span, ΔU, can be adjusted between

2 to 30 Vdc.

Ys Mechanical positioning range

(100% = angle of rotation 90°)

Yu Control signal

Uo Offset (start point)

ΔU Span

Uo = 0V, ΔU = 2V

The minimum working range for Ys = 100%

1. Uo = 5V, ΔU = 30V The maximum

working range for Ys = 100%

2. Uo = 0V, ΔU ≈ 10V Factory setting

Offset, Uo

Span, U

Control

Signals

EA0287R1

Setting for

10V span

0V offset

Figure 13. The Minimum and Maximum Control Signal Adjustment.

Example:

Open the actuator from 0% to 50% (45°) using a control signal of

Umin = 2V to Umax = 10V.

Calculating the value of ΔU:

V16

2)(10 x 100

% in rotation of angle Working

min) Umax (U %] [ 100

U =

−

=Δ

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