Digicom 8D5684QB Guide de l'utilisateur télécharger pdf (Page 10)

2.2

Pocket AL I/O QB QB Installation

Non optoinsulated Digital Inputs

Two status are supported for each non optoinsulated input: open or closed to ground. It is necessary

to connect a free contact only (without voltage) between the input pin and the ground pin.

It is not necessary to give voltage to inputs.You can use 1 and 6 GND ground pins present on 20

pins terminal board.

DIGITAL INPUTS FEATURES

Supported status : - Input open

- Input closed at ground (GND)

Open Collector outputs

The four Open Collector outputs of Pocket AL I/O QB allow the control of the devices that can be enabled

and disabled when a switch is closed (i.e. Light, Alarm, Logic port, etc.).

When connecting your devices, keep into consideration the maximum voltage that can be applied between

the collector and the emitter (Vce) of the Transistor and the maximum current that can pass through the

collector circuit (Ic):

Vce (max) Ic (max)

60V 700mA

You can use 1 and 6 GND ground pins present on 20 pins terminal board.

Connection examples

If with the output you want to manage a simple led (1,5V – 20mA) and you have at your disposal a 12V power supply, then you

will have to insert a pull-up resistor of 470Ω to limit the current.

If you want to control the 230V bulb through the open collector output of Pocket AL I/O QB, you must connect to Pocket AL I/O

QB an external relay and a protection diode for the internal transistor. In this case it is necessary to build a little external circuit

inserting a 1N4007 or 1N4148 diode and then to connect a proper relay.

NOTE: if an extension cable is needed to reach the relay, insert the protection diode as security for the

transistor.

GND

O.C.

GND

led

12V

230Vac

1N4007

Rele

GND

O.C.

GND

in pin

GND pin

GND

O.C.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 35 36

Pas de commentaire

Digicom 8D5684QB Guide de l'utilisateur Page 10