Specifications
17-420 | OWNER’S GUIDE
The ORION-DAQ-SYNC option is required for Dewetron 16-bit ORION cards.
The ORION-DSA-SYNC option is required for Dewetron 22- and 24-bit ORION cards.
The SYNC option also includes the security circuit if two master systems have to be connected together
over the sync bus connection. As soon as the system is congured to a master system the external sync is
ignored by disabling the SYNC-IN amplier. The LED labeled MI (master internal) indicates if the system is
congured to a master system. ME (master external) will light up if a valid sync signal is being received on
the SYNC-IN connector.
Above: schematic of ORION-XXX-SYNC option
- Note - if you plan on adding more compatible Dewetrons and hardware synchronizing them like this, it is highly
recommended to have the sync option installed at the factory. It is dicult to add later.
Opto-coupler emitter
Opto-collector
System on
Power +5V
Power GND
To ORION card sync
bus interface
SYNC IN
ME/MI LEDs (2)
SYNC OUT
In addition to the synchronization function the ORION-xxx-SYNC allows also the remote power-on of any
connected slave system. When the master is powered on, an opto coupler output (PC817) is activated
to switch on the power supply of the slave system. The remote power on also can be controlled with an
external control voltage (+5 V@Sys-On). Systems with this option typically have a three way power switch
labeled ON, OFF, and SLAVE ON. In this third mode, the system can be powered on remotely if connected
to a master. This is very convenient for powering on everything at once, and in the correct order.
On-board RS-485 interface
ORION cards are equipped with an RS-485 interfaced as standard. The baud-rate is xed to 9600, 8 data,
1 stop bit and no parity. This interface is used for conguration of DAQ, MDAQ, and HSI signal conditioning
modules. In addition, PAD and EPAD2 series modulescan also be handled. Therefore there is no need for
an additional serial interface for module control when ORION cards are used within your system.