CDA PC44 Instruções de Operação descarregar pdf (Página 37)

Current Sinking (NPN)

Requirements

IIIII

Ill

Installation 3-15

A current sinking (NPN) device capable

sinking at least 10 rnA must

used to stimulate the signal inputs.

The

internal circuitry for the

Nordson photosensor is pre-wired to include the required NPN

switching element. Figure

shows

the

wiring diagram for the

Nordson photosensor.

- 8

Figu

- Nordson photosensor wiring diagram

(wired as a sinking device)

-Photosensor

+12VDC

2-Signal

3-Ground

-Shield

itching element (NPN transistor), pre-wired within sensor circuitry

6 - Pigtail wire for shield

B - PC40

logic circuit

8 - +12V

Tips

for

Minimizing Unwanted

Triggering

NOI'clson

Corpotabon 1993

AI Aoghts Aeser.red

The

occure

unwanted trigger signals can

reduced

following

these recommendat

ns:

• Avoid routing sensor wires near

power lines, solenoid output

lines,

other electrical devices (i.e., motors, contactors, relays,

etc.) that

may

cause electrical interference. Especially avoid

routing wires in troughs

conduits with other high

current-carrying conductors.

• Make sure that no objects other than the substrate pass between

the sensor and substrate during line operation.

• Mount the sensors within the recommended distance range

the

substrate.

P/N 108 389A

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