Watlow Dual DAC User Manual

WATLOW DAC User’s Guide 1

Watlow Controls

1241 Bundy Blvd., Winona, MN 55987

Customer Service

Phone: [phone]

Fax: [phone]

Technical Support

Phone: [phone]

Fax: [phone]

E-mail: [e-mail]

DAC User’s Guide

Warranty

The 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 & Contrement & Control

See Manual for safe operation instructions

ASSY NO: 10045-

SERIAL NO:

4-20mA

0-5Vdc

0-10Vdc

DAC 1

+5V IN

DAC IN

123456

+10-24V IN

Introduction

The Digital to Analog Converter (DAC) is
an optional module for Watlow Anafaze
controllers. It is used to convert the con­troller’s Distributed Zero Crossing (DZC)
output signal to an analog process control
signal. Each DAC supports 4 to 20 mA, 0 to
5V and 0 to 10V output signals. This man­ual contains installation instructions, con­figuration information, and specifications.

Installing the DAC

You will need the following tools:

• Power drill with 0.15 inch bit

• Screwdriver

• Four screws up to #6 size. Choose
screws appropriate for your panel
material.

• Wire strippers

DUAL DAC

V OUT

I OUT

OUT COM

MADE IN THE USA

DAC 2

+5V IN

DAC IN

123456

+10-24V IN

V OUT

I OUT

OUT COM

ANAFAZE

Ordering Information

DAC -

DAC Type

1 Dual digital to analog converter module (con-

verts two DZC control outputs to two 0 to 5VÎ
(dc) analog outputs). Separate power supply
required.

2 Dual digital to analog converter module, (con-

verts two DZC control outputs to two 0 to 10VÎ
(dc) analog outputs). Separate power supply
required.

3 Dual digital to analog converter module, (con-

verts two DZC control outputs to two 4 to 20
mAÎ (dc) analog outputs). Separate power sup­ply required.

Power Supply

A None
B 120VÅ (ac) 60Hz wall mount power supply

adapter, powers up to 8 dual DAC modules.

C 120/240VÅ (ac) 50/60Hz panel mount power

supply adapter, powers up to 12 dual DAC modules).

To install the DAC module:

• Choose a wall or panel to install the
DAC.

• Drill four holes for mounting screws.
Refer to Figure 1 for mounting hole
dimensions and placement.

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

• Shut the system power off and wire the
DAC to the controller and final control
element. Figure 2 shows the wiring for
current. Figure 3 shows the wiring for
voltage.

Part No. 0600-1003-8000 Rev. 3.1

November 2008

WATLOW DAC User’s Guide 2

Wiring the DAC

A DAC module includes two identical cir­cuits. Each can convert a controller's DZC
or burst fire signal to an analog voltage or
current signal. Devices that are driven by
analog signals are often sources of electri­cal noise. Without the proper isolation
noise may interfere with the controller's
operation. To isolate the measurement and
control circuits from such noise, power
DAC modules with a dc power supply that
is isolated from the controller's power sup­ply.

Several DAC modules may be powered by
one power supply. Consult Specifications
for the DAC’s power requirements.

Operation

Before operating your DAC:

• Make sure the jumpers have been set
for the desired output signal type. See

Configuring DAC Outputs.

• Select Distributed Zero Crossing (DZC)
as the output type for the correspon­ding loop or channel.

To test the DAC:

1. Select the loop to be tested.

2. Set the control output to manual mode.

3. Set a percent output level.

4. Use a volt or current meter to verify
the output level.

ement & Contr

Holes for #8 (4 mm)

Figure 2. DAC with Current Output

Figure 3. DAC with Voltage Output

Figure 1. DAC Dimensions

screws or bolts

1.75 in
44 mm

3.6 in.
91 mm

SERIAL NO:

4-20mA

0-5Vdc

0-10Vdc

DAC 1

+5V IN

DAC IN

123456

+10-24V IN

3.0 in.
76 mm

Measurement & Contr

See Manual for safeoperation instructions

ASSY NO

V OUT

I OUT

: 10045-

OUT COM

DUAL DAC

MADE IN THE USA

DAC 2

+5V IN

DAC IN

123456

+10-24V IN

V OUT

ol

I OUT

OUT COM

3.7 in.
94 mm

4.4 in.
112 mm

0.3 in.
8 mm

0.4 in.
10 mm

Controller Output

+5V

control output

Load mA

Power Supply

12 to 24VÎ (dc)

+

–

+ –

1 +5V CTRL supply

2 DZC signal

3 +12/24VÎ (dc) external

power supply

4+VÎ (dc) load connection

5 -mA dc load connection

6 -external power supply

& VÎ (dc) load connection

Controller Output

+5V

control output

Load volts dc

Power Supply

12 to 24VÎ (dc)

+

–

+ –

1 +5V CTRL supply

2 DZC signal

3 +12/24VÎ (dc) external

power supply

4+VÎ (dc) load connection

5 -mA dc load connection

6 -external power supply

& VÎ (dc) load connection

DAC

DAC