Sonics GXT - Manual (Page 39)

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I N S T R U C T I O N M A N U A L • M O D E L G X T P O W E R S U P P LY
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SINKING OUTPUT TO PLC INPUT DIAGRAM
When the optical IC is placed into socket U43, the G series outputs are
configured as “Sinking.” The isolated transistor emitters must be connected
to the return line of the loop supply (all 4 emitters are connected together;
signal name Voltage Sink Return (output); pin 19 on I/O Connector J3; cable
wire – blu/red).
When the G series output is true or ON, current from the loop supply is
conducted through the PLC input card, the G series output transistor and
100 ohm limiting resistor to the loop supply return line.
See schematic drawing on page 41 for more detail.
PLC OUTPUT TO SINKING INPUT DIAGRAM
When the optical IC for input configuration is placed into socket U28, the G
series inputs (DI1, DI2, DI3, DI4) are configured to receive a “Sinking” input,
a pull down transistor or relay contact to the loop return. The anodes of the
input LEDs must be connected to a user supplied loop supply; +30 VDC max
(all 4 LED anodes are connected together; signal name +VDC Sink-Input; pin
12 on I/O Connector J3; cable wire – black/white).
When the PLC output is true or ON, current from the loop supply is
conducted through the G series opto LED and 2.4 kohm limiting resistor to
the PLC output card which returns to the loop supply. If the PLC output is
ON (conducting), the current is returned to the loop return line and the input
is true or ON. If the PLC output is OFF the G series input is false or OFF.
See schematic drawing on page 42 for more detail.
PLC OUTPUT TO SOURCING INPUT DIAGRAM
When the optical IC for input configuration is placed into socket U44, the G
series inputs are configured to receive a “Sourcing” input, a high side
transistor or relay contact to the positive loop supply. The cathode side of the
input LEDs must be connected to the return line of the loop supply (all 4
cathodes are connected together; signal name Voltage Source Return –
input; pin 13 on I/O Connector J3; cable wire – red/white).
When the PLC output is true or ON, current from the loop supply is
conducted through the PLC output element to the G series input opto LED
and limiting 2.4 kohm resistor to the return of the loop supply. If the PLC
output is ON (conducting) the G series input is true or ON. If the PLC output
is OFF the G series input is false or OFF.
See schematic drawing on page 43 for more detail.
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