Watlow QPAC Manual de usuario descargar pdf (Pagina 14)

14 QPAC User's Guide Chapter 2: Install & Wire

63.5mm (2.50 in)

Motherboard Connector

120VÅ (ac)

Input

38.1mm

(1.50 in)

08-5285

Input Signal Wiring

When wiring the input signal do not run any signal wires alongside or in the

same conduit with the ac power or load wires. Signal input should be pro-

vided by a shielded, two-conductor wire. Shield should be grounded at the

temperature control end only. Wrap the power control end with electrical

tape. The following gures show the wiring conguration for the input signal

to the QPAC Control Cards.

CA Control Card — AC Input Contactor

The 120VÅ (ac) input (24 volts input optional) signal lines for the CA (ac In-

put, Solid-State Contactor) Control Card are connected to pins 1 and 3 of the

input signal connector. A 120VÅ (ac) input signal turns the power control on.

The turn off voltage for the power control is 0VÅ (ac).

Input Wiring

CAUTION:

Built-in noise reduction

circuitry on the CA card

requires an external load

resistor (1000Ω, 25W,

typical) across the input

when operating from a

triac source, to prevent

false triggering. Failure

to apply this resistor

could result in damage

to product and equip-

ment or injury to person-

nel.

CA Card Wiring SS

Contactor, 120V

Å (ac)

Input.

Motherboard Connector

Pin 2 (+)

Pin 3 (-)

51mm

(2.00 in)

38mm

(1.50 in)

2 (+)

3 (-)

08-5286

CD Control Card — DC Input Contactor

For dc input, the input signal is wired into pin 2 (+) and pin 3 (-) of the input

signal connector. An input signal of 3 to 30VÎ (dc) turns the QPAC power

control on. 0 to 1VÎ (dc) turns the power control off.

CD Control Card, Solid-

State Contactor, 3 to

30V

Î (dc) Input.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 33 34

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Watlow QPAC Manual de usuario Pagina 14

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