Table of Contents
Advertisement
1-1
DeviceNet Safety System Overview
1-1-1
About DeviceNet Safety
DeviceNet is an open-field, multi-vendor, multi-bit network, which combines the controls in the machine and
line control levels with information. The DeviceNet Safety network adds safety functions to the conventional
standard DeviceNet communications protocol. The DeviceNet Safety concept has been approved by a third-
party organization (TUV Rhineland).
Just as with DeviceNet, DeviceNet Safety-compliant devices from third-party vendors can be connected to a
DeviceNet Safety network. Also, DeviceNet-compliant devices and DeviceNet Safety-compliant devices can
be combined and connected on the same network.
By combining DeviceNet Safety-compliant products, a user can construct a safety control/network system
that meets the requirements for Safety Integrity Level (SIL) 3 according to IEC 61508 (Functional Safety of
Electrical/Electronic/Programmable Electronic Safety-related Systems) and the requirements for Safety Cat-
egory 4 according to EN 954-1.
Safety Control performed by the
Safety Network Controller
- Safety remote I/O communications
Safety Network Controller
- Safety Master functions
- Standard Slave functions
16
Safety
configuration
Safety communications
Safety I/O Terminal
- Safety Slave functions
- Standard Slave functions
Standard Control and Monitoring by
the Standard PLC
- Standard remote I/O communications
Network Configurator
- Explicit message communications
Standard
configuration
Standard communications
Safety Network Controller
- Safety Slave functions
- Standard Slave functions
Standard PLC and Master
Standard Slave
Section 1: Overview
Advertisement
Table of Contents
