Watlow VPAC-BT Remote Mount Transformer Bedienungsanleitung PDF herunterladen

General Description

The BT card (Watlow P/N 08-5406) is time proportioning

with a variable (very fast) time base. At 50% power, one

full cycle is ON, and one full cycle is OFF. At 25%

power, it is ON one cycle and OFF for three. At 90%, it

is ON nine cycles and OFF for one. As the command

signal gets farther from 50% power, the time base gets

longer. The maximum time base resolution is 1 in 360

ac cycles. The BT card is factory set for 4-20mA into

250Ω. It can be changed to a voltage input by removing

the 300Ω, R22 resistor, located on the lower right corner

of the card. Without R22, it is a 5K input impedance.

See the illustration on the reverse side. Bias and gain

pots allow the card to be adjusted for any voltage from

0-3VÎ (dc) to 15VÎ (dc) or current between 0 to 25mA.

BT card power supply requirements are 24VÅ (ac) cen-

ter tap transformer secondary. Transformer primary

must be connected to the same line phase as the heater

load. For example, is the heater is powered by L1 and

L2, then the power transformer must also be connected

to L1 and L2. See the illustration on the reverse side.

Dimensions

Specifications (1276)

Input

• Process input factory set @ 4-20mA Î (dc)

• Input impedance 250Ω (clip resistor for 5KΩ voltage

input), or manual control input

Output

• Burst firing control, variable time base

• TTL compatible (5V logic) at about 5mA @ 5V. Will

drive one industry standard 3-32VÎ (dc) input ran-

dom fire SSR. For single phase only.

Line Voltage Power

• 50/60 Hz V~ (ac) line frequency

• Voltage ±10%, 120, 208, 240, 277, 380, 415, 480V~

(ac). Power transformer is supplied with the BT

card. When ordering, specify power supply voltage

and line frequency.

Line Voltage Compensation

• 10%∆ in line, 2%∆ in load in the 30% to 70% power

region.

Input to Output Linearity

• 2%, 30% to 70% power region

Operating Environment

• 32 to 122°F (0 to 50°C)

Storage Temperature

• -40 to 185°F (-40 to 85°C)

Options

• Manual control kit for voltage input cards (1KΩ

potentiometer) #08-5362. Includes dial, knob, 1KΩ

pot and wiring.

Ordering Information

• Watlow P/N 08-5406

2.5"

(64 mm)

2.5"

(64 mm)

3.0"

(76 mm)

Input

Bias

Gain

To VÎ (dc)

Input SSR

08-5406

R22

Watlow Controls

1241 Bundy Blvd., P.O. Box 5580

Winona, MN 55987-5580

Phone: 507-454-5300, Fax: 507-452-4507

VPAC-BT

Remote Mount Transformer

Data Sheet

0600-0028-0002 Rev C (1277) Made in the U.S.A.

January, 1998 Printed on Recycled Paper

10% Postconsumer Waste

1 2

Inhaltsverzeichnis

Seite 1 - VPAC-BT

General DescriptionThe BT card (Watlow P/N 08-5406) is time proportioningwith a variable (very fast) time base. At 50% power, onefull cycle is ON, an

Seite 2 - Remote Mount Transformer

InputPot (+) (-)Transformer PlugR22Zero CrossSSR- +BT876543214321HeaterSafety Contactorif requiredSemiconductorFuseBranch CircuitFusesTr

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Watlow VPAC-BT Remote Mount Transformer Bedienungsanleitung

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Inhaltsverzeichnis

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