Rockwell Automation 1753-DNSI DeviceNet Safety Scanner for GuardPLC Controllers - Manual (Page 17)

Publication 1753-UM002A-EN-P - July 2005
Before You Begin 1-7
The 1753-DNSI features two communication ports; one for DeviceNet
communications and one for High-Speed Safety Protocol (HSP)
communication with a GuardPLC controller. The HSP port is a 1 Mbps,
full-duplex RS-485 interface.
The safety scanner also features a 4-character dot-matrix display,
which provides status and error codes. Status LEDs on the safety
scanner indicate module, network, and HSP connection status. See
Chapter 10 for more information.
Supported Connections
The DeviceNet Safety port supports a maximum of 32 DeviceNet
Safety input connections, 32 DeviceNet Safety output connections,
and standard connections for up to 63 nodes.
The safety scanner does not support Quick Connect, Auto Device
Replacement or Autoscan.
Safety Connections
The safety scanner supports single-cast producing or consuming
connections and multi-cast consuming connections as a DeviceNet
Safety originator. Up to 32 producing and 32 consuming safety
connections can be made. These connections are used when the
safety scanner is communicating to distributed safety I/O modules.
The safety scanner also supports the use of two safety targets, defined
by RSLogix Guard PLUS! and made available via the Target
Connections File. One target may be a single- or multi-cast producer,
the other may be a single-cast consumer. These connections allow the
safety scanner to look like safety I/O to another safety scanner on the
network, and can be used for interlocking of safety data between two
GuardPLC systems.
Standard Connections
The safety scanner supports the following standard DeviceNet
connection types:
Standard Master Connections Standard Slave Connections
Polled Polled
Change of State (COS) —
Cyclic —
Bit Strobe —