System Manual Compact Systems
3 Product Description
HI 800 141 E Rev. 2.02
Page 17 of 110
The digital outputs DO are pulsed (briefly set to low level), to monitor the wires connected to the
digital inputs. The
time base of the test pulse can be configured within 5...2000 μs (default value
400 μs).
i
If line control is configured in a remote I/O, the remote I/O's watchdog time must be increased
(default value 10 ms).
Line control detects the following faults:
Cross-circuit between two parallel wires.
Improper connection of two wires DO to DI, connection in contrast with the configuration
specified in the software, e.g., DO 2 → DI 7 (configured), DO 2 → DI 6 (wired).
Earth fault on one wire (with earthed ground only).
Open-circuit or open contacts, i.e., including when one of the two EMERGENCY STOP
switches mentioned above has been engaged, the
FAULT
LED blinks and the error code is
created.
If such a fault occurs, the following reactions are triggered:
The
FAULT
LED on the module's or device's front plate blinks.
The inputs are set to low level.
An (evaluable) error code is created.
If multiple faults occur simultaneously, the error code is the sum of all single fault error codes.
Line control can be configured if the following systems are used: F1 DI 16 01, F3 DIO 8/8 01,
F3 DIO 16/8 01, F3 DIO 20/8, F20, F30 and F31.
3.2
Line Monitoring with HIMatrix F35
Refer to the HIMatrix F35 manual (HI 800 149 E) for details on how to implement open-circuit
and short circuit monitoring for digital inputs.
3.3
Supply Voltage Monitoring
The HIMatrix system is a single voltage system. In accordance with IEC/EN 61131-2, the
required supply voltage is defined as follows:
Supply voltage
Nominal value
24 VDC, -15...+20 %
20.4...28.8 V
Max. permissible function limits in
continuous operation
18.5...30.2 V
(including ripple)
Maximum peak value
35 V for 0.1 s
Permissible ripple
r < 5 % as r.m.s. value
r
PP
< 15 % as value peak-to-peak
Ground
L- (negative pole)
Earthing the ground is permitted, see Chapter
7.2.5.1.
Table 11: Supply Voltage
The power supply units of HIMatrix systems must comply with the SELV (Safety Extra Low
Voltage) or PELV (Protective Extra Low Voltage) requirements.
Observing the permitted voltage limits guarantees the system's proper operation.
The required SELV/PELV power supply units ensure safe operation.