2 introduction, Introduction – Contemporary Control Systems BASremote User Manual (firmware 3.1.x) User Manual
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TD040300-0MF
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2 Introduction
The BAS Remote Master provides the ultimate in flexibility. It can be used for
Expansion I/O at remote locations where an Ethernet connection exists. Its built-in
router and gateway capability addresses unique integration needs where more than one
communications protocol is involved. It can function as a controller with its resident
Sedona Virtual Machine. Powered by a Linux engine, the BAS Remote Master can
operate as BACnet/IP or Modbus TCP remote I/O, Sedona controller, Modbus Serial to
Modbus TCP router, Modbus Serial to BACnet gateway, and Modbus master to
attached Modbus slaves
– all at the same time. The BAS Remote also supports web
services. You can customize the unit via custom web pages that utilize special java
applets provided in the device. A 10/100 Mbps Ethernet port allows connection to IP
networks and popular building automation protocols such as Modbus TCP, BACnet/IP,
and Sedona SOX. Six universal I/O points and two relay outputs can be configured
through resident web pages using a standard web browser and without the need of a
special programming tool. A 2-wire Modbus serial port can greatly expand the I/O count
with built-in routing to Modbus TCP clients. If BACnet mapping is preferred, the unit
incorporates a Modbus serial to BACnet/IP gateway. Additional universal I/O can be
achieved with the simple addition of BAS Remote Expansion modules. The BAS
Remote Master PoE has the same capabilities as the BAS Remote Master except it is
powered over the Ethernet connection
— thereby providing a “One Cable Solution.”
Both the BAS Remote Master and BAS Remote Expansion modules have the same
I/O capability. Six universal input/output points are provided on each module.
Depending upon configuration, each unit can accommodate a contact closure from a
digital point, a thermistor, voltage or current analog input from a field transmitter or
supervisory controller. Analog inputs can range from 0
–5 VDC, 0–10 VDC or 0–20 mA.
Inputs can be scaled to accommodate ranges such as 1
–5 VDC, 2–10 VDC, and 4–20
mA. Input point resolution is 10-bits.
Type II and III 10 kΩ thermistor calibration curves are resident in the BAS Remote. Single-
point calibration of temperature is accomplished using the internal web server. Inputs can
accept pulse trains in the range of 0
–40 Hz (50% duty cycle) to measure flow rates.
Analog outputs can be 0
–10 VDC or 0–20 mA. However, scaling for 2–10 V, 0–5 V,
1
–5 V and 4–20 mA is possible. LED indicators identify the state of I/O points. Output
point resolution is 12 bits.
There are two relay outputs available with both normally open (NO) and normally closed
(NC) contacts. The relay output rating is 30 VAC/VDC, 2A.
There are two non-isolated 2-wire EIA-485 Expansion ports on the Master module. The
downstream port (DN) is intended for Expansion modules while the Modbus (MB) port
functions as either a Modbus TCP router or Modbus serial to BACnet gateway
— allowing
for the attachment of Modbus 2-wire or 3-wire EIA-485 serial devices. On BAS Remote
Expansion modules, the two ports are marked UP and DN, and are dedicated for
communication with the BAS Remote Master module and other Expansion modules.
All field connectors are removable
— making field replacement of units quick and simple.
A single RJ-45 shielded connector provides the 10/100 Mbps twisted-pair Ethernet
connection. The unit supports auto-negotiation of data rate and duplex. A resident web