HIMA HIQuad X - I;O Bus; I;O Watchdog (WD)

Product Description System
Page 52 of 110 HI 803 211 E Rev. 1.01.00
To perform the connection, use patch cables with the following characteristics:
 At least Cat. 5e (in accordance with IEEE 802.3) for 1 Gbit/s, for industrial applications.
 Industrial RJ-45 connectors on both sides.
 The cable shielding must comply with at least Class D in accordance with ISO/IEC 11801.
 Autocrossover allows the use of both crossover and straight through cables.
Suitable patch cables (Cat. 5e) with industrial connector are available from HIMA in standard
lengths.
NOTICE
Communication interference possible!
Use patch cables compliant with industrial standard Cat. 5e or better!
In harsh environments (e.g., subject to temperature changes, electromagnetic
interference), low-quality patch cables may cause communication to fail.
The maximum system bus latency can be set to System Defaults or 100 µs using the Maximum
System Bus Latency [µs] system parameter located in the resource properties. When the
Maximum System Bus Latency [µs] is set to System Defaults, the maximum system bus latency
is determined by the system. For the 100 μs setting, the maximum system bus latency is set to
this value!
For system bus connections running within a control cabinet, the minimum cross-section of
patch cables must be 0.2 mm².
For system bus connections running outside a control cabinet, the minimum cross-section of
patch cables must be 0.5 mm². If necessary, installation cables with rigid cores must be used
instead of patch cables with flexible cores.
4.5 I/O Bus
All I/O modules are connected to the I/O processing module via the I/O bus. The I/O processing
module in the H41X base rack (slot 13) and in the extension rack (slot 17) connect the I/O bus
to the system buses.
4.6 I/O Watchdog (WD)
A second independent shutdown option is required in safety-related systems. This is ensured by
an I/O watchdog signal (24 V). The I/O watchdog is controlled, monitored, and applied to the
output modules by the I/O processing modules. The output modules only operate when the
watchdog signal is present (high level). If the I/O watchdog signal is switched off, the output
modules safely enter the de-energized state.