Contemporary Control Systems BASRTP-B User manual

BASRTP-B
Portable
BACnet®Multi-Network Router
Installation Guide
TD070210-0ID
For Firmware Versions 2.x

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Trademarks
Contemporary Controls, ARC Control, ARC DETECT, EXTEND-
A-BUS, RapidRing, and CTRLink are trademarks or registered
trademarks of Contemporary Control Systems, Inc. Specifications
are subject to change without notice. Other product names may be
trademarks or registered trademarks of their respective companies.
BACnet is a registered trademark of the American Society of Heating,
Refrigeration, and Air-Conditioning Engineers, Inc. (ASHRAE).
TD070210-0ID 19 February 2010
Copyright
© Copyright 2010 by Contemporary Control Systems, Inc. All
rights reserved. No part of this publication may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated
into any language or computer language, in any form or by any
means, electronic, mechanical, magnetic, optical, chemical, manual,
or otherwise, without the prior written permission of:
ContemporaryControlSystems,Inc.
2431 Curtiss Street
Downers Grove, Illinois 60515 USA
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.ccontrols.com
ContemporaryControls (Suzhou)Co. Ltd
11 Huoju Road, Science & TechnologyPark
New District, Suzhou, PR China 215009
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.ccontrols.com.cn
Contemporary Controls Ltd
Sovereign Court Two, UWSP
Sir William Lyons Road
Coventry CV4 7EZ UK
Tel: [phone]
Fax: [phone]
E-mail [e-mail]
Web: www.ccontrols.co.uk
Contemporary Controls GmbH
Fuggerstraße 1 B
04158 Leipzig, Germany
Tel: [phone]
Fax: [phone]
E-mail [e-mail]
Web: www.ccontrols.de
Disclaimer
Contemporary Control Systems, Inc. reserves the right to make
changes in the specifications of the product described within this
manual at any time without notice and without obligation of
Contemporary Control Systems, Inc. to notify any person of such
revision or change.

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Contents
1Introduction ................................................................. 4
2Specifications............................................................... 5
Electrical...................................................................... 5
Environmental.............................................................. 5
Functional.................................................................... 5
Electromagnetic Compatibility ..................................... 5
Connectors................................................................... 6
Mechanical .................................................................. 6
3Power........................................................................... 7
4Operation..................................................................... 9
MS/TP Port.................................................................. 9
Ethernet Port................................................................ 9
IP Address Reset Switch .............................................. 9
LEDS........................................................................... 9
5Webpage Configuration ............................................. 10
Device Parameter ....................................................... 13
BACnet Ethernet........................................................ 13
BACnet/IP Parameters ............................................... 14
MS/TP Parameters ..................................................... 15
Status Screen.............................................................. 16
6Warranty.................................................................... 18
Returning Products for Repair .................................... 18
7Declaration of Conformity.......................................... 19

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1 Introduction
The BASRTP-B is a multi-network router, sharing messages
among BACnet/IP, BACnet Ethernet and MS/TP networks. The
router is configurable via its internal webpage. The unit attaches
to a USB port of your computer and has one isolated MS/TP port
and one 10/100 Mbps Ethernet Auto-MDIX port.
The MS/TP port offers a 3-pin terminal block with a removable
plug for the EIA-485 connection. Through this port, up to 254
devices can be addressed —as many as 31 full-load devices on
the attached segment. All MS/TP baud rates (as stated in the
BACnet standard) are supported.
The Ethernet port offers a shielded RJ-45 connector. Through
auto-negotiation and Auto-MDIX, it automatically matches its
duplex setting, data rate and signal polarity to whatever is
needed by the attached equipment. Thus, only a straight-through
CAT5 cable is needed for hook-up.
The USB port is strictly used to power the BASRTP-B. No
communications is supported via the USB port.
The BASRTP-B features a user-accessible switch to reset the IP
address, subnet mask and gateway address to the factory defaults.
Three LEDs are present: A power LED glows green when proper
power is provided. The Ethernet LED glows green for 100 Mbps
operation and yellow for 10 Mbps and flashes to indicate activity.
A green LED flashes when MS/TP traffic is received.
Each unit complies with Class A radiated and conducted emissions
as defined by EN55022 and CFR 47, Part 15, and is intended for
use in non-residential areas.

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2 Specifications
Electrical
INPUT USB (Type B Port)
Voltage (V, nominal): 5 VDC
Current (mA, typical): 300
Power: 2.5 W
Environmental
Operating temperature: 0°C to 60°C
Storage temperature: –40°C to +85°C
Relative humidity: 10–95%, non-condensing
Functional
Ethernet MS/TP
Signalling: 10BASE-T EIA-485
100BASE-TX (ANSI/ASHRAE135-2008)
Cable length limit: 100 m 1200 m (for AWG 18)
MS/TP Baud rate (bps): 9600, 19200, 38400, 76800
MS/TP node limit: 254 devices total
31 full-load devices per segment
MS/TP LED: flashing green = receive valid activity
Ethernet LED: green = 100 Mbps
yellow = 10 Mbps
flashing = activity
Regulatory Compliance
CE Mark; RoHS; CFR47, Part 15 Class A
Electromagnetic Compatibility
Each unit complies with Class A radiated and conducted emissions
as defined by EN55022 and CFR 47, Part 15. This equipment is
intended for use in non-residential areas.
Warning This is a Class A product as defined in EN55022. In a
domestic environment this product may cause radio interference in
which case the user may be required to take adequate measures.

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Connectors
3-pin (MS/TP) Pin Assignments
(Also explained on product label)
RJ-11 (MS/TP) Pin Assignments
2 RT –
4 SC
5 RT +
(All other pins are unused.)
RJ-45 (MDI Ethernet) Pin Assignments
1 TD + 3 RD +
2 TD –6 RD –
(All other pins are unused.)
Mechanical
Figure 4 —Product Dimensions
Figure 3 —RJ-45 Connector
Figure 1 —3-pin Connector
Figure 2 —RJ-11 Connector

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3 Power
The BASRTP-B features a USB 2.0 Full Speed Device Port that
accepts the USB cable with Type B plug that is included in the box. It
takes 5 VDC from a host computer, while typically drawing 300 mA of
current. It can operate from a USB hub, if desired, and no driver
installation is needed.
For MS/TP devices, see Figure 5 for proper 2-wire bus connections and
Figure 6 for proper 3-wire bus connections. The BASRTP-B does not
apply any failsafe bias or termination.
Figure 5 —2-wire MS/TP Bus Wiring

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Figure 6 —3-wire MS/TP Bus Wiring

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4 Operation
MS/TP Port
The MS/TP port uses an isolated EIA-485 transceiver that is
connected to both a removable 3-pin connector (Figure 1) and an
RJ-11 jack. Either connector can be used for the MS/TP line.
The EIA-485 transceiver’s + and – lines tie to + and –pins of
both connectors. The SC pin ties to the circuit ground of the
EIA-485 transceiver and is isolated from both the USB and
Ethernet ports.
The router can access 254 MS/TP devices and supports 31
devices on thelocal bus at rates of 9600, 19200, 38400, or 76800 bps.
Ethernet Port
This port offers a shielded RJ-45 connector. Through auto-
negotiation and Auto-MDIX, it automatically matches its duplex
setting, flow control, data rate and signal polarity to whatever is
needed by the attached equipment. Thus, the provided CAT5 cable
is the only cable needed for the Ethernet hook-up.
IP Address Reset Switch
When pressed for at least 1 second
(at any time the router is under
power), this switch will reset the
default values of the IP address
(192.168.92.68), gateway address
(192.168.92.1) and netmask (24).
It is accessed by a paper clip (or similar device) via a small hole
in the case —then after reboot, the default values apply.
LEDS
Power glows green if power supplied to the unit is proper
Ethernet glows solid for a valid link (green for 100 Mbps or
yellow for 10 Mbps) and flashes to show activity
MS/TP flashes green when receiving valid MS/TP traffic
Figure 7 —Reset Switch

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5 Webpage Configuration
Each router contains an interactive web server, accessible from
any Internet-compatible PC on the local network and compatible
with recent versions of Internet Explorer (5.0 or later, suggested)
or Netscape Navigator (7.1 or later, required). It is factory-
programmed with a default IP address of 192.168.92.68 and a
Class C subnet mask of 255.255.255.0 (/24).
Figure 8 shows the setup for accessing the MS/TP network using
the BASRTP-B, a computer for configuration, and a connection
to the MS/TP network. Make sure that a USB cable connects
between the PC and the BASRTP-B so it can be powered.
To configure the router, attach it to a computer with an Ethernet
connection and a standard web browser. For initial configuration,
the PC chosen for the procedure should temporarily have its IP
address modified as illustrated in Figure 9 —which employs a
Windows®XP example.
The example in Figure 9 suggests an IP address for the PC of
192.168.92.69, but the final quad of the address could be any
value from 3 to 254 —except for 68 which is used by the router.
After the IP address of the PC has been set to the same subnet as
the router, a browser can access the router via its default IP address.
Figure 8 —Setup for Initial IP Address Configuration

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Figure9—Stepsfor Changing the IP Address of the PC Usedfor Setup
On some systems, this
option is:
―My Network Places‖.

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After entering the router’s IP address into your browser’s address
field, you will see the Router Configuration Page with the default
values as shown in Figure 10 —using Windows Internet Explorer.
Figure 10 —Router Configuration Page with Default Values
Each parameter of the configuration is explained on the following
pages. When save changes is selected, the parameters are stored
to non-volatile memory and you are prompted to recycle power to
the unit.

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Device Parameter
Device Instance (Default Value = 0)
The router’s device instance is a 22-bit value (0–4,194,302). Do
not use 4,194,303 which is reserved by BACnet. Each BACnet
device within the same BACnet internetwork must have a unique
device instance. One must be assigned to the BASRTP-B.
BACnet Ethernet
Ethernet Network (DefaultValue= 0—disables BACnet Ethernet)
Most BACnet communication that is carried by Ethernet uses the
BACnet/IP protocol. However, there are still instances in which
the older BACnet Ethernet protocol (ISO 8802-3) is found. The
BASRTP-B allows these two protocols to communicate.
BACnet Ethernet uses Ethernet MAC addresses for station
addressing —unlike BACnet/IP which addresses messages by
means of Internet Protocol (IP) addresses. Each Ethernet MAC
address (often called the physical address) is unique to the
Ethernet network adapter. It is permanently embedded into the
adapter during manufacture and cannot be changed. It is
composed of six two-digit hexadecimal numbers (00–FF). An
example of an Ethernet MAC address is:
00-08-A1-10-BD-EB
Each Ethernet network adapter has the ability to store an IP
address that is changeable. This IP address is typically
represented as four decimal values (each is 0–255) separated by
dots. Often called the dotted quad format, an example is:
192.168.92.1
NOTE: Although they may share the same Ethernet physical
network, BACnet Ethernet devices and BACnet/IP devices must
have their own unique network number and these two networks
cannot communicate unless their messages pass through a router.
These network numbers must be in the range of 1–65534 (0 and
65535 are reserved). If the BACnet Ethernet network value is
left at its default value of 0, the BACnet Ethernet function within
the BASRTP-B will be disabled.To prevent message loops, a
subnet must have only one router enabled for BACnet Ethernet.

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BACnet/IP Parameters
BACnet/IP UDP Port (Default Value = 0xBAC0)
This 16-bit hex value (BAC0–BACF) is set to BAC0 by default.
Usually, this default value should not be changed. In a typical
installation, each BASRTP-B will be assigned the same UDP
port.
BACnet/IP Network (Default Value = 1)
The BACnet/IP network number is a 16-bit value (1–65534).
Each network within the BACnet internetwork must have a
unique number. This includes the BACnet/IP and MS/TP sides
of the BASRTP-B. Do not use addresses 0 or 65535 since these
addresses are reserved.
IP Address (Default Value = 192.168.92.68)
The IP address of the router can be 0.0.0.1–255.255.255.254. A
private address is usually assigned to the BASRTP-B.
IP Subnet (Default Value = 24)
This value (0–30 in the ―slash‖ notation) is the number of bits
with a ―1‖ in the mask. The default value of 24 corresponds to
255.255.255.0 in the dotted decimal format. All devices on the
same subnet which communicate via BACnet/IP should use the
same subnet mask.
IP Gateway (Default Value = 192.168.92.1)
The default gateway for the IP stack is a dotted decimal number
in the range of 0.0.0.0–255.255.255.254. This will be the IP
address of your local IP router —if one exists.

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MS/TP Parameters
MS/TP MAC (Default Value = 00)
This is the 8-bit (0–127) MAC address of the router’s MS/TP port,
in decimal. Lower MAC address numbers are preferred with the
default recommended. It is further recommended that all other
BACnet devices attached to the same MS/TP network be assigned
consecutive MAC addresses beginning with 1 without allowing any
gaps in addressing. Slave devices may have MAC addresses of 128–
254, but MAC address 255 is reserved.
MS/TP Network (Default Value = 2001)
This 16-bit decimal network number (1–65534) must be unique
for all BACnet networks within the BACnet internetwork. No
other networks, regardless of type, can have the same network
number. Do not use addresses 0 or 65535 since these addresses
are reserved.
Max Masters (Default Value = 127)
Only master nodes participate in the MS/TP token-passing
process. The highest master MAC address (in decimal) in the
MS/TP network is 127 and you should use 127 if you are unsure
of other MS/TP device addresses. Each MS/TP device should
use this same value. For a value in this field to be proper, it must
equal or exceed the highest MAC address for any master on the
network. Optimum performance occurs when this value:
1. equals the highest MAC address of any master, and
2. all masters use sequential MAC addresses
Since many BACnet devices do not allow this parameter to be
changed, leave the BASRTP-B at the default value.
Max Info Frames (Default Value = 40)
This is the maximum number of messages that can be routed
onto the MS/TP network by the router per token pass. Its range
is 1–100, and typical values are 20–40. Smaller values provide
less access to the MS/TP network from the BACnet/IP network
because they give native MS/TP messages higher priority than

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those passed by the router from BACnet/IP. The default value
usually provides good performance.
MS/TP Baud Rate (Default Value = 9600)
The baud rate of the MS/TP network can be 9600, 19200, 38400
or 76800 bps. All MS/TP devices on the same MS/TP network
must use the same baud rate. On power up the router checks for
other masters; if finding none, it begins token passing —at which
point autobauding devices will adjust to the router’s baud rate.
MS/TP Tolerance (Default Selection = Strict)
This setting determines the degree to which interoperability with
devices is successful. The Lenient option is less efficient for
traffic flow but optimizes interoperability. A slight improvement
in performance will be realised by selecting the Strict setting.
Status Screen
The Status Screen depicted in Figure 11 reports the traffic of the
various protocols handled by the BASRTP-B. It shows the
number of messages received and transmitted for each of the
supported networks.
Note: ―BIP 1‖ is the only BACnet/IP port in use. Although it
appears in the screen, ―BIP 2‖ is not used in this version of the
product. Therefore, the counts of ―BIP 2 Incoming Packets‖ and
―BIP 2 Outgoing packets‖ will always be 0.
―Available Memory‖ (at the bottom of the list) is the amount of
RAM currently unused (normally about 30K). If one network is
temporarily offline and another network is attempting to
communicate with this network, the available memory may drop
very low until the offline network returns to an online condition.
The remaining information indicates the instantaneous MS/TP
state of the router and is documented in the MS/TP portion of the
BACnet standard.
―RFSM‖ is the current Receive Frame State Machine state.
―MNSM‖ is the current Master Node State Machine state.

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By refreshing this page, you can watch the router MS/TP state
change and gain insight into the state of the MS/TP network (as
seen by the router). For example, if ―MNSM‖ always reports
SoleMaster or PollForMaster, after repeated refreshes, then the
router cannot communicate with any MS/TP devices.
―Next Station‖ is the MS/TP MAC address of the device to
which the router will next pass the token. This value may
change if devices leave or enter the network —and when the
router searches for devices on the network, as per the BACnet
MS/TP standard.
Figure 11 —Status Screen

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6 Warranty
Contemporary Controls (CC) warrants this product to the original
purchaser for two years from the product shipping date. Product
returned to CC for repair is warranted for one year from the date the
repaired product is shipped back to the purchaser or for the remainder of
the original warranty period, whichever is longer.
If the product fails to operate in compliance with its specification during
the warranty period, CC will, at its option, repair or replace the product
at no charge. The customer is, however, responsible for shipping the
product; CC assumes no responsibility for the product until it is received.
CC’s limited warranty covers products only as delivered and does not
cover repair of products that have been damaged by abuse, accident,
disaster, misuse, or incorrect installation. User modification may void the
warranty if the product is damaged by the modification, in which case this
warranty does not cover repair or replacement.
This warranty in no way warrants suitability of the product for any
specific application. IN NO EVENT WILL CC BE LIABLE FOR
ANY DAMAGES INCLUDING LOST PROFITS, LOST SAVINGS,
OR OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE
PRODUCT EVEN IF CC HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY
ANY PARTY OTHER THAN THE PURCHASER.
THE ABOVE WARRANTY IS IN LIEU OF ANY AND ALL OTHER
WARRANTIES, EXPRESSED OR IMPLIED OR STATUTORY,
INCLUDING THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR PARTICULAR PURPOSE OR USE, TITLE AND
NONINFRINGEMENT.
Returning Products for Repair
Return the product to the location where it was purchased by
following the instructions at the URL below:
www.ccontrols.com/rma.htm

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7 Declaration of Conformity
Applied Council Directives:
Low Voltage Directive 2006/95/EC
General Product Safety Directive 2001/95/EC
Electromagnetic Compatibility Directive 2004/108/EC
Restriction of Hazardous Substances Directive 2002/95/EC
Waste Electrical and Electronic Equipment Directive 2002/96/EC
Standards to which Conformity is Declared
EN 55022:2006 + A1:2007, Class A, Limits and Methods of
Measurement of Radio Disturbance Characteristics of Information
Technology Equipment
EN 55024:1998 + A1:2001 + A2:2003, Information Technology
Equipment —Immunity Characteristics —Limits and Methods
of Measurement
Manufacturer: Authorized Representative:
Contemporary Control Systems, Inc.
2431 Curtiss Street
Downers Grove, IL 60515 USA
Contemporary Controls Ltd
Sovereign Court Two, UWSP
Sir William Lyons Road
Coventry CV4 7EZ UK
Type of Equipment:
Portable BACnet Multi-Network Router
Model: BASRTP-B
Manufacturer’s Declaration: The specified product conforms
to the directives and standards listed above.
February 2010

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