Contemporary Control Systems BASgatewayLX - Manual

BASgatewayLX
Modbus to BACnet ® Converter
C
ONTR LS O
®
CONTEMPORARY
BAS
gateway LX
InstAllAtIon GuIde
IntroduCtIon
Modbus remains a popular network interface. It is commonly used with boiler control,
variable speed drives, and metering applications — but these devices lack BACnet
compliance. To make Modbus devices appear as individual BACnet devices, the
BASgatewayLX is used. This device has one 10/100 Mbps Modbus TCP or BACnet/
IP Ethernet port and an opto-isolated Modbus EIA-485 serial port for Modbus RTU or
Modbus ASCII devices.
Up to 30 Modbus serial devices can share the unit’s Modbus port and up to 1000
Modbus registers can be processed. The virtual routing feature in the BASgatewayLX
allows each connected Modbus device to appear as an individual BACnet-compliant
device. What is needed is a device profile for each Modbus type device. Contemporary
Controls maintains a library of common device profiles. If one is not available,
Contemporary Controls will provide it upon request. Custom device profiles can be
uploaded to the gateway.
Using web pages and a resident database of common Modbus device profiles, Modbus
registers from Modbus Serial devices can be mapped to BACnet objects.
Gateway Functionality Between …
• Modbus Serial (RTU or ASCII) to BACnet/IP
• Modbus TCP and BACnet/IP
Routing Functionality Between…
• Modbus Serial (RTU and ASCII) and Modbus TCP
Flexible Communication Ports
• 10/100 Mbps Ethernet with auto-negotiation and Auto-MDIX
• Opto-isolated serial port supports either 2-wire or 3-wire EIA-485
• Jumper-selectable EIA-485 bias and termination
• Baud rates from 2.4–115.2 kbps
Convenient Installation
• 24 VAC/VDC powered
• DIN-rail mounting