Watlow SDAC User Manual

WATLOW SDAC User’s Guide 1

Introduction

The Serial Digital-to-Analog Converter (Serial DAC) is
an optional module for Watlow Anafaze Controllers. It
allows the controller to output precision analog volt­ages or currents. The Serial DAC is typically used for
precision open-loop control, motor or belt speed con­trol, or phase-angle fired control.

This manual contains installation instructions, config­uration information, and specifications.

Features

• Electrically isolated

• 0.003% resolution and linearity; factory calibrated
to 0.05% accuracy for voltage outputs and 0.5%
accuracy for current outputs. The Serial DAC can
also be recalibrated to 0.1% accuracy on current
output.

• User-selectable voltage or current output.

• Controller setup menus allow zero- and full-scale
value adjustments within the Serial DAC’s 0 to
10V

Î (dc) and 0 to 20 mAÎ (dc) output ranges.

Installing the Serial DAC

You will need the following tools:

• Power drill with 4-mm (0.15-in) bits

• Screwdriver

• Four screws up to size #6 (up to 3.8 mm). Choose
screws appropriate for your panel material.

• Wire strippers

ement

&

Contr

Watlow Controls

1241 Bundy Blvd., Winona, MN 55987

Customer Service

Phone: [phone]

Fax: [phone]

Technical Support

Phone: [phone]

Fax: [phone]

E-mail: [e-mail]

Part No. 0600-2185-2000 Rev. 4.0

December 2004

SDAC User’s Guide

To install the SDAC module:

1. Choose a wall or panel to install the Serial DAC.
For best results choose a location near the con­troller and in an area free from dust, excessive
heat and moisture and unauthorized personnel.

2. Drill four holes for screw mounting. See Figure 1
on page 2 for mounting hole dimensions and place­ment.

3. Place the Serial DAC in its mounting location so
that the screw holes in the Serial DAC line up
with the holes you have drilled. Insert the screws
in the holes and tighten.

4. Shut the system power off and wire the Serial
DAC to the controller and final control element.

Warranty

The Serial DAC is warranted to be free of defects in
material and workmanship for 36 months after deliv­ery to the first purchaser for use, providing that the
units have not been misapplied. Since Watlow has no
control over their use, and sometimes misuse, we can­not guarantee against failure. Watlow’s obligations
hereunder, at Watlow’s option, are limited to replace­ment, repair, or refund of purchase price, and parts
which upon examination prove to be defective within
the warranty period specified. This warranty does not
apply to damage resulting from transportation, alter­ation, misuse, abuse, or improper fusing.

Measurement & Contr

SERIAL DAC

Power Input: 5Vdc, 300mA max.

Voltage Output: 10Vdc, 10mA max.

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DATA IN

FLASHING

=RUNNING

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+ OUT

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4 mm (0.2 in.)

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&

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2 WATLOW SDAC User’s Guide

Wiring the Serial DAC

The Serial DAC provides a robust analog output sig­nal. The module converts the proprietary Serial DAC
signal from the controller’s open collector output in
conjunction with the clock signal to an analog current
or voltage. See Figure 2 for wiring a Serial DAC. The
Serial DAC is user-configurable for voltage or current
output. Refer to Figure 3 for configuration information.

The Serial DAC optically isolates the controller’s con­trol output from the load. One Serial DAC may be
powered by the 5VÎ (dc) supplied by a CLS200,
MLS300 or CPC400 controller at its output terminal
board. These controllers cannot provide sufficient cur­rent for more than one Serial DAC; use an external
power supply.

Figure 2. Single or Multiple Serial DACs with External
Power

Configuring Serial DAC Outputs

The Serial DAC’s voltage and current output is jumper
selectable. Refer to Figure 3. Configure the jumpers as
indicated on the Serial DAC label.

Figure 3. Voltage and Current Jumper Positions

Measurement

&

Control

DA

N

ut

O

t

O

E

Figure 1. Serial DAC Dimensions

WARNINGS

Ó

WARNING

The SDAC module is for indoor use only. To reduce
the risk of fire or electrical shock, install in a con­trolled environment relatively free of contaminants.

Ó

WARNING

Use a power supply with a Class 2 rating only.

NOTE

Tighten screw terminal connections to 0.5 to 0.6 Nm
(4.5 to 5.4 inch-pound).

NOTE

Use copper conductors only.

diameter

44 mm

(1.8 in.)

Measurement & Contr

SERIAL DAC

Power Input: 5Vdc, 300mA max.

Voltage Output: 10Vdc, 10mA max.

C

urrent O

U

S

E

:

+5V IN

1

COM IN

2

CLK IN

3

DATA IN

4

C

O

FLASHING

=RUNNING

V

O

utpu

P

P

t: 10V

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R

C

d

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c, 20

N

O

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C

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C

P

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A

A

T

U

R

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m

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R

R

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ax.

E

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{

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+ OUT

5

OUT

-

6

P

IN

ol

119 mm (4.7 in.)

138 mm (5.5 in.)

91 mm

(3.6 in.)

76 mm

(3.0 in.)

8 mm

(0.3 in.)

10 mm
(0.4 in.)

Daisy chain up to

16 SDAC

IN

:

+5V I

1

COM IN

2

COPPER CONDUCTORS ONLY

CLK IN

3

DATA IN

4

FLASHING

CURRENT

=RUNNING

VOLTAGE

: 5Vdc, 300mA max.

utput: 10Vdc, 10mA max.

utput: 10Vdc, 20mA max.

OUTPUT SELECT

{

{

+ OUT

5

OUT

-

6

C

Power Supply

+V1 (5V)

0

+V2 (15V)

COM

Controller Output

SDAC Clock

Serial DAC

1 +5V In

2 COM In

3 CLK In

4 Data In

5 + Out

6

-

Out

Pins

Control Output

–

Load

+