Specifications
Table Of Contents
- 1.0 System Overview
- 2.0 Product Description
- 2.1 Application Software
- 2.2 Custom Software Development
- 2.2.1 SITECONFIG-SVC - SiteScan Configuration Service Agreement
- Additional Benefits
- HIGRAPHIC - Create a Graphic
- HIGRAPHICM - Modify a Graphic
- HIGRAPHICUP - Upgrade SS2000W Graphic to SSWeb Java-Based Graphic (1)
- HIGRAPHICUP-5 - Upgrade SS2000W Graphics to SSWeb Java-Based Graphics (2-5)
- TEXTMOD - Customized Modifications
- MODCONFIG-4 - Modbus Configuration
- MODCONFIG-12 - Modbus Configuration
- BACCONFIG-4 - BACnet Configuration
- BACCONFIG-12 - BACnet Configuration
- 2.2.1 SITECONFIG-SVC - SiteScan Configuration Service Agreement
- 2.3 Gateway Modules
- 2.4 SiteLink Modules
- 2.5 Site I/O Modules
- 2.6 Stand-Alone Monitoring Modules
- 2.7 Module Accessories
- 2.8 ARCnet Communication Enhancement Devices
- 2.8.1 ARC156-KIT - ARCnet Kit
- 2.8.2 Other ARCnet Parts
- ARCDIAG485 - ARCnet156 Diagnostics Board
- ARCDIAG485WO - ARCnet156 Diagnostics Board Without Enclosure
- ARCPROT485 - ARCnet156 Surge Protection Board
- ARCPROT485WO - ARCnet156 Surge Protection Board Without Enclosure
- ARCREP485 - ARCnet156 Repeater Board (Signal Booster)
- ARCREP485WO - ARCnet156 Repeater Board Without Enclosure
- 2.9 Third-Party Interfaces
- 3.0 Application and Configuration
- 4.0 Upgrading SiteScan 2000 Systems to SiteScan Web
- 5.0 Third-Party and Building Management Interfaces
- 5.1 SiteScan Web and BACnet/IP to BMS
- 5.2 BACnet/IP to BMS Without a SiteScan Web Front-End
- 5.3 BMS Front-End Interfacing to Liebert Equipment by EIA-485 Modbus
- 5.4 SiteTPI-E with OpenComms NIC (or OpenComms 485)
- 5.5 Basic SiteTPI-E with Third-Party Equipment
- 5.6 SiteTPI-E and Third-Party Equipment with Different Modbus Protocol
- 6.0 ARCnet156
- 7.0 Wiring Guidelines
- Appendix A - Terminology

Third-Party and Building Management Interfaces
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5.3 BMS Front-End Interfacing to Liebert Equipment by EIA-485 Modbus
Modbus is an industry standard means of communicating between systems from different vendors. A
SiteScan Web system using Modbus allows a Third Party to request information from a SiteLink,
With SiteScan Web, single or multiple SiteLinks can communicate to other systems using Modbus on
either Port A or Port B.
Both ports send out Modbus information. They differ in that Port A is configurable for RS-232 or two-
or four-wire RS-485 media access. Port B is DB-9 and RS-232 only.
5.3.1 Port A—RS-485 Modbus
When configured for RS-485, this allows Port A to be daisy-chained with multiple SiteLinks. In this
example, both the SiteLinks and the third-party device use a five-screw terminal to make the wiring
connection. When using RS-485 each SiteLink or the third-party equipment is between 1250 and
4,000 ft. (381-1219m) away depending on the baud rate being used. Make this connection with
shielded or unshielded twisted pair wiring.
Figure 12 Modbus on Port A—RS-485
Table 14 Bill of materials: Port A—RS-485 Modbus
Qty. Mktg. P/N Description
3 SITELINK-4-M SiteLink-4-M (4 Liebert IGM interfaces)
3 XFMR24 Transformers for 120/24VAC module power supply
Note: The bill of materials does not include LGS startup part numbers. Most LGS startup part
numbers are added automatically when ordering.
Third
Party
Network
RS-485