DAD10-8P Optical data coupler
Product description
Dat
e of
issue
2010-
04
Par
t No.
226387
7
4
Product description
Features
• Supply Voltage: 10-60 VDC
• Range: 0 - 1,5 m.
• Sensitivity control
• Half Duplex Data transmission
• Baud Rate: 2400
• 10 optocoupler inputs
• 10 PNP-outputs.
• Action of outputs by interrupting the beams is selectable
• Optical signals for receiving, data inputs and data outputs
• Programmable Operating mode - Master/Slave.
• External transmitter switch off
4.1
Technical Description
The DAD 10-8P unit allows for bidirectional data transmission of 8 bit data words. A pair
of units is required to create the transmission path. One of the units is set up as the MAS-
TER (High-level at input Master / Slave) and the second as the SLAVE (Low-level at input
Master / Slave).
All parallel binary control signals connected to the inputs D1 to D8 are converted into an
8 bit serial sequence. This serial data is transmitted by light beam to the receiver where
it is converted back to parallel data available at the outputs D1 to D8. Frequency shift
keying is used to provide secure transmission of the binary data. The total response time
is 3ms during which both 8 bit words are transmitted, one in each direction, in timed mul-
tiplex mode.
This provides a transmission speed of 2400 baud. A feature of the timed multiplex mode
is that the last data message is always stored at the output until the next message is
transmitted.
4.2
Action on light beam interruption:
The action required in case the light beam is interrupted can be controlled by a switch.
Switch position 1: data outputs are switched off, when the light beam is interrupted.
Switch position 2: The data received last is still available at the outputs, when the light
beam is interrupted.
4.3
Switching off the transmitter:
For operating the DAD10-8P a High-level is necessary at the ENABLE input. If the EN-
ABLE-input is at low level, the transmitter is switched off.
If the transmitter is switched off at the MASTER, the SLAVE -transmitter is also switched
off automatically. If the SLAVE is switched off, the MASTER still transmits data, that the
SLAVE receives.
