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Chapter 3 Power and ST-Bus Wiring
Drawing No. LP1106
ST-Bus Wiring Guidelines
Revision B
ST-IPm-8460
SixTRAK IPm
®
RTU/Controller
SixTRAK IPm Power Connections
Figure 3.1. Power Connections
ST-Bus Wiring Guidelines
ST-Bus wiring connects the legacy SixTRAK I/O modules and expanders to the SixTRAK IPm RTU/Controller. Follow the
upcoming guidelines for reliable performance.
ST-Bus Capability
• Max. modules or expanders connected directly to SixTRAK IPm RTU/Controller 10
• Max. modules connected to expander output 20 (any mix)
• Required cable type: any with 2 individually shielded pairs, 22 AWG min.
• Recommended cables: Alpha 2466C, Belden 8723, Carol C1352
• Max. cabling off each SixTRAK IPm RTU/Controller or expander 25 ft.
EtherTRAK-2 Wiring Guidelines
Connection to Dual Network I/O modules is standard 802.3 Ethernet. Best performance is seen when following the
guidelines set out in that standard.
EtherTRAK-2 Guidelines
The specifications below are application guidelines to get the best performance from the SixTRAK IPm RTU/Controller.
Depending on the specifics of the application these numbers can be tweaked. Factors that can affect performance are scan
time, network, protocol and load from other programs running in the RTU.
• Maximum number of 3rd party stations and I/O modules per RTU: 128
• Ring Network limit (Switches and I/O modules): <50 per ring for best performance
• Passthru network limit (Switches and I/O modules): <25 for best results
• Minimum recommended cable quality: Cat 5
• Maximum length of Ethernet cable (per hop): 100 meters
• Maximum number of 3rd party stations and I/O modules at 10ms poll time: 16
• Maximum number of 3rd party stations and I/O modules at 100ms poll time: 50
• Poll time is not exact. Please allow for variance of poll time by up to 30% depending on application details.
Please contact Technical Support for more information.