Cynergy3 UF Series Інструкція з монтажу - Сторінка 2

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Connecting an Open Collector Pulse Output device

The term

open-collector

typically refers to a transistor output where the collector (output) of the transistor is not connected to a positive

voltage. Since a transistor used in outputs is a saturated switch, the collector needs to be connected to a positive voltage to complete the

transistor circuit. This positive voltage need not be any specific value as long as it is above the saturation of the transistor. Because of this, an

open collector output can be connected to a range of voltages using a pullup resistor. This resistor is required for the output to function as it

completes the transistor's circuit.

Many circuits use open-collector outputs to be able to provide Different Voltage Interfacing

Since the exact voltage of the pullup resistor is not critical, an open-collector output can be used to interface one logic voltage level with

another.

Supply +V1

8-2 Vdc

Red

UFunit

Circuit using different voltages

Connecting a 4-20mA Output device

4-20mA Standard

4-20mA output systems are an industrial control standard as they allow input signal changes, without affecting the output current. This also

means that the output signal is relatively immune to noise (as most noise will cause voltage disturbances, and not affect the regulated

current). This makes 4-20mA devices more suited to critical-control systems.

Cable Connection

s -

Red: Power Supply +ve connection Black: Common

Excessive Load Resistance will cause current sourcing that will affect the accuracy of this device's current output.

Note:

There is no requirement for a minimum Load resistance, as this is a current sink device

Supply +V

(8-24Vdc)

Power Supply

Sensor

Black

Common

An ammeter (or suitably arranged multi-meter), placed in series at the Iout point, will give an indication of the sensors current performance i.e.

flow.

If the meter used has adjustable zero and span, then the meter could be altered to represent the flow in litres/min.

9001

ISO

C E R T I F I E D

© 2014 Cynergy3 Components, All Rights Reserved. Specifications are subject to change without prior notice. Cynergy3 Components and the Cynergy3 Components logo are trademarks of Cynergy3 Components Limited.

Supply +V2

5-2 Vdc

10kR

Blue

Counter

Black

Maximum Load Impedance:

Red +V

Brown

Current Sink

4-20mA

UFunit

, Brown

: Current Sink (4-20mA)

R L = Vin -

(

Iout

Red

10kR

Blue

Black

Circuit using common voltage supply

5) x 40

Load(circuit)

www.cynergy3.com

Supply +V

8-2 Vdc

Counter