Download BRG-N100 Guide Spec [MS WORD]

Guide Specification - MasterFormat™ 2012 Style
Source File Name: 582761147_R1A
©EBTRON, Inc.
SECTION 230923.14 FLOW INSTRUMENTS
Data contained in this guide specification may be placed in either of the following sections, depending on the specifics of the
system design, or incorporated within the next higher level controls specifications (230923.14 FLOW INSTRUMENTS or even
higher in 230923 DIRECT DIGITAL CONTROL (DDC) SYSTEMS FOR HVAC).
PART 2 PRODUCTS
2.1 SECTION INCLUDES
A. Acceptable Manufacturers
1. EBTRON, Inc.
2. Approved performance equal
B. Products Included in this Section
1. Analog-to-RS-485 Network Bridge (ATNB) with configurable display and integral alarm capability.
2.2
ACCEPTABLE MANUFACTURERS
A. EBTRON, Inc. model BRG-N100 is the basis of design
1. Basis of Design and Acceptable Manufacturers
a. Substitution requests for acceptance less than 60 days prior to bid date or products submitted in
non-conformance with the requirements of this specification will not be considered.
1) For any product to be considered for substitution, a written document shall be
submitted to the engineer detailing exceptions and compliance, section-by-section with
supporting documentation, before an approval will be considered.
2) Any product submitted as an equal shall be expected to comply with all performance
capabilities and functional aspects of this specification.
B. Products approved
1. [List approved equals here that comply with ALL functional and performance requirements of this
specification]
2.3
PRODUCTS INCLUDED IN THIS SECTION
A. Analog-to-RS-485 Network Bridge (ATNB) with configurable display and integral alarm function
1. General
a. Provide one ATNB with display and an integral alarm function for each location indicated on the
plans, schedules and/or control diagrams.
2. Capabilities and Potential Applications
a. Provide a display for any analog or BACnet/Modbus sensor, without the need of BAS.
b. Convert any analog output sensor to an RS-485 BACnet MS/TP or Modbus RTU network sensor.
c. Add alarm capability to any analog output or RS-485 BACnet or Modbus network sensor.
d. Display custom units of measure.
e. Accurate and scalable voltage conversion.
f. Make any sensor a BACnet or Modbus network sensor.
3. Design and Construction
a. Network Bridge shall consist of a PCB with external terminals mounted inside a flame retardant
ABS electronics enclosure.
1) The electronics enclosure shall be UL94 flame spread rated.
2) The enclosure shall include flanges for surface mounting, textured cover with screws for
flush attachment to the base and integral screw bosses for PCB mounting.
b. The ATNB shall provide an integral 16-character LCD display for display of airflow, temperature,
alarms or other definable values; and a 4-button user interface for configuration and diagnostics.
c. Internal wiring between the connecting cable and sensor nodes shall be Kynar coated copper.
Guide Specification - MasterFormat™ 2012 Style
Source File Name: 582761147_R1A
1) PVC jacketed internal wiring is not acceptable.
Internal wiring connections shall consist of solder joints and spot welds.
All PCB interconnects and test points shall be gold plated.
All PCB shall be electroless nickel immersion gold (ENIG) plated.
The transmitter shall have an on-off power switch. Isolation transformers (by installers) may be
required.
h. The ATNB shall be powered by 24 VAC (22.8 to 26.4 under load) @2.5 V-A.
i. The ATNB shall be mounted in an environment protected from direct contact with water.
j. The ATNB shall use a “watchdog” timer circuit to ensure continuous operation in the event of
brown-out and/or power failure.
BAS Connectivity Options
a. The ATNB shall be provided with one of the following:
1) One non-isolated RS-485 network connection (field selectable BACnet MS/TP or Modbus
RTU protocol) for the scalable network value of AI1, including units of measure.
2) An analog input network object may be substituted for the physical analog input AI1 in
applications that require an RS-485 BACnet device be read without a BAS network.
Note: This functionality is not available for Modbus devices.
3) Provide individual 24 VAC transformers at each bridge for applications requiring isolated
RS-485.
b. One analog input alarm shall be configurable or user defined as appropriate.
1) Analog Input (AI1) shall be compatible with incoming signals of either voltage or current:
0-10VDC or 4-20 mA (from 4-wire source, no excitation voltage).
2) When the alarm is active, the alarm condition shall be indicated on the LCD display.
3) The network type shall be indicated on the LCD.
4) Alarm reset shall be field-selectable either as manual or automatic.
5) Alarm set points shall be adjustable by type, tolerance (user defined % of set point),
delay, disable/enable, and analog signal indication.
c. Each bridge shall provide one dry contact relay with onboard jumper to drive a remote LED.
1) The relay shall be rated for no less than 30 VDC or 24 VAC @ 2.5 V-A max.
2) NO or NC function shall be field selectable via user setup.
3) Contact closure relay shall be assignable.
Environmental Limits
a. Operating temperature range for the bridge shall be -20° F to 120° F (-28.9° C to 48.9° C).
b. Operating humidity range for the bridge shall be 5 to 95% RH.
Physical Dimensions
a. 3.57H x 6.00W x 1.58D inches (90.7 x 152.4 x 40.1 mm)
d.
e.
f.
g.
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©EBTRON, Inc.