Siemens SQM5 Instructions d'exploitation télécharger pdf (Page 14)

Technical Instructions

Document No. 155-517P25

Rev. 1, July, 2000

Page 14 Siemens Building Technologies, Inc.

Features of

SQM5x.xxxxxZx

Actuators

SQM5xx.xxxxxZx actuators contain the AGA56.9A… multi function circuit board. This

circuit board provides the following features:

Multiple Input Signals

The AGA56.9A… circuit board accepts the following input signals:

Line voltage

• Power to A drives the actuator open to the setting of switch cam I (Maximum).

• Power to ZL drives the actuator closed to the setting of switch cam III

(Minimum).

• Power to Z drives the actuator closed to the setting of switch cam II (Economy).

• 4-20 mA (Signal to Y3, common to M)

• 0-135 Ω

ΩΩ

Ω (Slide wire signal to Y0, potentiometer connected to M and U4)

• 0-10 Vdc (Signal to Y1, common to M)

• 0-20 mA (Signal to Y2, common to M)

Multiple Output Signals

The AGA56.9A… circuit board provides the following output signals:

• 4-20 mA (Signal from U3, common to M)

• 0-10Vdc (Signal from U1, common to M)

• 0-20mA (Signal from U2, common to M)

Double potentiometers ASZ22… provide additional output signals.

Electronic Linearization

Function

With jumper J1 in position 1 (upper position), the linearization function is enabled. The

circuit board electronically converts the input signal to match the flow characteristics of a

typical butterfly valve. Consequently, the actuator will make smaller rotational

movements when subjected to lower input signals and larger rotational movements

when subjected to higher input signals. For example (based on a 90° modulating range),

a change in input signal from 4 to 8 mA (25% increase) will cause a rotational movement

of 11.25°. An equal signal change from 16 to 20 mA will cause a rotational movement of

45°.

With jumper J1 in position 2 (lower position), the linearization function is disabled. When

disabled, the rotational movement of the shaft is proportional to the input signal.

Input Signal Override

Line voltage to terminal P will drive the actuator to a pre-set adjustable position,

overriding all modulating input signals. Use the potentiometer marked POS to adjust the

override position to any setting within the setting range of switch cams I and III.

Parallel Operation

To configure the actuator for parallel operation, set the jumper J2 in position 1 (upper

position). Input signals Y0, Y1, Y2 or Y3 are directly shunted to output signals U1, U2

and U3. All output signals are available regardless of which input signal is applied.

Master/Slave Operation

To configure the actuator for master/slave operation, set J2 in position 2 (lower position).

The output signals U1, U2 and U3 reflect actual shaft position.

Split Ranging

AGA56.9… circuit boards have a modulating signal shift feature which can be used for

split ranging. If no signal is present on Y0, Y1, Y2 or Y3, the actuator will modulate

through the full rotational range in response to a 12 to 20 mA signal applied at ZF. If a

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Siemens SQM5 Instructions d'exploitation Page 14

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