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Concept

Concept


Products: AS-P Smoke Control, Automation Server Smoke Control
Functionalities: Smoke Control
Product version: 2.0
2/12/2019

MS/TP Network Accessories

MS/TP network accessories include the following:

  • bLINK Series MS/TP Repeaters

  • MS/TP Network Bias Supply

For more information, see Common Network Accessories .

bLINK Series MS/TP Repeaters

You use the bLINK Series MS/TP repeaters (the bLINK-AC-S, the bLINK-DC-S, the bLINK-F-AC-S, and the bLINK-F-DC-S models) to provide an RS-485 repeating function between multiple BACnet MS/TP ports. The -F models provide two fiber optic ports for extending the MS/TP network over fiber and dropping the copper MS/TP interface at a remote location with EMI immunity over the fiber extension. A 24 VDC power supply powers the -DC models and the -AC models are powered by 120 VAC line voltage.

 
action_zoom_plus_stroke bLINK Series MS/TP repeaters
Figure: bLINK Series MS/TP repeaters

All four models pass the standard BACnet MS/TP protocol through the five, provided RS-485 ports. You can use these units to extend the MS/TP bus length or segment excess node counts. The repeaters may have UUKL listed product on any or all ports. They have also been approved by UL 864 for use as an isolation device where non-UUKL product may be isolated on one or more of the ports. UUKL listed controllers used in the smoke control application must not be placed on the MS/TP bus segments containing any non-UUKL devices.

Note:

For UL 864 compliance, any non-UUKL product must have a UL listing (of some type in order to reduce the risk of shock and fire) before it can be connected to an open/available repeater port (that is not used for connecting to any smoke control controllers).

MS/TP Network Bias Supply - Altronix VR1TM5

The I/A Series MNB MS/TP controllers require a 5 volt bias on the MS/TP network bus. When a MNB-300 controller is used and positioned at the ends of the bus, it provides network bias via its plug-on bias resistor connections. When an MNB-300 is not positioned at the end of the network bus, and the cable length exceeds 500 feet, you can use an external isolated 5 volt supply to bias the network.

The supply you use for this purpose is the Altronix model VR1TM5 bias supply. This model is configured on the bus as described in the installation section of the guide. For more information, see RS-485 Field Bus Cable Routing .

 
action_zoom_plus_stroke Altronix VR1TM5 Bias Supply
Figure: Altronix VR1TM5 Bias Supply

See Also

  • EcoStruxure BMS Hardware Overview
  • EcoStruxure BMS Overview
  • MS/TP BACnet Field Controllers
  • Smoke Control Enclosures and Requirements
  • RS-485 Field Bus Cable Routing
  • Transformers