Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 166)

Publication 1747-UM010B-EN-P - September 2003
A-2 Specifications
Network Specifications Baud Rate Determination of Maximum Cable Length and
Terminating Resistor Size
DIP Switch Position for Baud Rate Selection
Throughput Introduction RIO throughput is defined as the time between when an input event
occurs at an I/O module in an RIO chassis to when an output event
occurs at an I/O module within the same RIO chassis. There are three
types of throughput concerning the 1747-BSN Backup Scanner
Module and its RIO network:
•
discrete throughput (time from discretely mapped input to
discretely mapped output) without block transfers (BTs) present
•
discrete throughput (time from discretely mapped input to
discretely mapped output) with BTs present
•
BT throughput (time from when a BT is enabled to when the BT
successfully completes)
Baud Rate Max. Cable
Distance
(Belden™ 9463) Resistor Size
Using Extended
Node Capability 57.6K baud 3048 m (10,000 ft.) 82
Ω
1/2 Watt
Gray-Red-Black-Gold
115.2K baud 1524 m (5,000 ft.)
230.4K baud 762 m (2,500 ft.)
Not Using
Extended Node
Capability 57.6K baud 3048 m (10,000 ft.) 150
Ω
1/2 Watt
Brown-Green-Brown-Gold
115.2K baud 1524 m (5,000 ft.)
230.4K baud 762 m (2,500 ft.) 82
Ω
1/2 Watt
Gray-Red-Black-Gold
Position 1 Position 2 Baud Rate
ON ON 57.6K
ON OFF 115.2K
OFF ON 230.4K
OFF OFF Disabled