Quantum Instruments Splitter Boxes - Manual (Page 15)

15
Functions
(continued)
0
IP 67 monobloc I/O splitter boxes
for fieldbuses
0
Advantys™ Distributed I/O, FTB splitter boxes
b DESINA - Standard relating to the connector technology of sensors, and actuators,
established by the German Machine Tool Builder’s Association.
Diagnostics
Each Advantys FTB splitter box has one LED per channel to indicate the status of
the channel and to enable fast and precise location of a fault. Fault monitoring
diagnostics are indicated on the splitter box by LEDs and are fed back to the control
system (PLC) via the bus.
There are 2 levels of diagnostics:
b diagnostics per channel,
b diagnostics per splitter box.
Diagnostics per channel
b Sensor short-circuit
A short-circuit or overload on contact 1 of the M12 female connector blows the self-
resetting fuse. Each M12 connector is individually protected. A red LED indicates
the fault on the corresponding M12 connector. This fault is signalled to the Master.
Supply to the sensors is automatically restored after elimination of the fault.
b Actuator short-circuit
A short-circuit or overload of an output causes disconnection of this output. The fault
is signalled to the Master. A red LED indicates the fault on the corresponding M12
connector. The output does not restart automatically. After having eliminated the
cause of the fault, the channel must be reset by the PLC. This operation erases the
short-circuit memory.
b Actuator warning
When the output is at state 0, the contact corresponding to the M12 female
connector is checked for presence of 24 V voltage. If + 24 V is present, it means
there is a “short-circuit”. A red LED indicates the fault on the corresponding M12
connector. The fault is signalled to the Master.
Diagnostics per splitter box
b Sensor/actuator supply status.
b “Undervoltage” fault on the I/O supply.
b Sensor short-circuit.
b Actuator short-circuit.
Use of the sensor/actuator diagnostics function
Advantys FTB splitter boxes allow the use of sensors and actuators incorporating an
integrated diagnostics function (DESINA type c). Configuring contact 2 of each M12
connector as a diagnostic input enables detection of external faults associated with
the sensors or actuators.
This information enables the following faults to be detected:
b damage to the detection surface,
b faulty electronics,
b no load.
Selection of either the sensor input or diagnostic input function on contact 2 is made
channel by channel, by entering parameters, when configuring the splitter box.
Fault indication by a red LED is possible for each channel configured as a diagnostic
input (LEDs 10 to 17).
Example of connection of a sensor with integrated diagnostics function:
Using the M12 diagnostics adaptor accessory FTX DG12, it is possible to monitor
breaks in wiring to sensors or actuators which do not have an integrated diagnostics
function.
1
2
4 (S)
3
Diagnostic
M12
connector
DESINA
sensor
1
4 (S)
3
1
2
4 (S)
3
M12 adaptor
FTX DG12
(by-pass)
Diagnostic
Sensor
M12
connector
Description, configuration:
pages 18 , 21, 24, Characteristics:
pages 26, 27 References:
pages 28 - 30 Dimensions:
pages 31 - 33
Example of connection of a sensor with integrated diagnostics
function
Example of connection of a standard sensor with the
diagnostics adaptor
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com