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BTI; BTI-MDM w/ modem

Supervisory Interface Devices
Date Last Saved: 6/7/2005 4:43:25 PM

Product Name(s): BTI; BTI-MDM w/ modem
Product Description: The Alerton BTI is a programmable supervisory interface and multi-port BACnet compliant router. The BTI can support up to 256 Alerton secondary control units (VisualLogic Controllers also known as VLCs) on four MS/TP networks. The BTI communicates using BACnet/IP or alternately using BACnet/EtherTI can also communicate with 3rd-party BACnet-compliant devices. Tnet. When communicating using BACnet/IP the BTI can act as a BACnet Broadcast Management Device (BBMD) and communicate with up to 31 other BBMDs.
Product Application(s): The BTI communicates with all connected VLCs to update information and share points, and then coordinates building-wide control and energy management functions via commands to these secondary control units (VLCs). The BTI has the capacity to execute pre-programmed and custom routines for global building control and energy management functions.
Point Quantity Characteristics
Analog Input (AI): N.A. N.A.
Digital Input (DI): N.A. N.A.
Universal Input (AI or DI): N.A. N.A.
Analog Output (AO): N.A. N.A.
Digital Output (DO): N.A. N.A.
Universal Output (UO): N.A. N.A.
Other: N.A. N.A.
A/D Converter Resolution
D/A Converter Resolution
HOA switches provided on each output?
Note: These are also available as an add-on from 3rd party vendors.
Indicating status LED on each output?
Integral Flow Sensor? N.A.
Integral Damper Actuator? N.A.
Can controller accept occupant override from thermostat? N.A.
Can controller accept occupancy sensor input? N.A.
Expander Boards N.A.
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1) - BACnet/IP or BACnet/Ethernet port to primary network @ 10/100 Mbps
(4) - BACnet MS/TP ports to secondary network @ 9.6 - 76.8 kbps (polling; alternate use)
(1) - BACnet port to PTP (9.6 - 115.2 kbps)
External Communication Ports, Speeds and Access Devices (1) - EIA-232 port using BACnet/PTP @ 57.6 kbps; To: Laptop/PC for device configuration (Alerton AC-2650 cable required)
(1) - Modem port
Additional Information (Optional)
Network Accessing Capabilities via Controller
Controller Access Devices
Zone-Based Interface Access N.A.
Zone Interface Hardware
*Note: This section covers the capabilities for accessing the controller or other parts of the network from the controller (i.e. 'bottom-up').
Standard access functionality is covered in the Architecture and Software sections.
**Does NOT include front-end OI functions. See vendor for specific functions available.
Microprocessor(s) Motorola 32-bit Power PC CPU
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization Synched up via standard BACnet Time_Synchronization message by OWS, or by any device which can transmit standard BACnet Time_Synch.
Volatile Memory (RAM) Capacity 32 MB DRAM
Volatile Memory (RAM) Uses
RAM use unrestricted
RAM use restricted as shown below
Information Not Provided
Program Execution / Calculation storage
Data / Trends / Alarms storage
Configuration / Parameter storage
Control Programming storage
Others Information not provided
Is Volatile Memory Supported By Battery? Yes - external battery provides power conditioning and noise filtering for ongoing operational data integrity and internal battery
Battery Type(s) Battery Type(s) External 12v gel-cell and internal replaceable 3v lithium coin-cell
Battery Life External 12v gel-cell is continuously charged and replacement is recommended every two years. Internal 3v lithium coin-cell has a standby life of ten years.
Backup Battery Operating Time External 12v gel-cell provides up to five minutes of powerless operation for orderly shutdown and data backup. Internal 3v lithium coin-cell provides up to 1.5 years cumulative real-time clock without AC or battery power.
Non-Volatile Memory Capacity (EEPROM/Flash)* 128K SRAM
16MB CompactFlash
64K Flash ROM
Non-Volatile Memory Uses
Data / Trends / Alarms / Calculation Storage
Configuration / Parameter Storage
Control Programming Storage
Controller Operating System
Additional Information Items in NV memory are not lost upon power or battery failure. Other types of NV memory such as EPROM, NOVROM, etc. do not directly impact system performance.
* Items in NV memory are not lost upon power or battery failure. Other types of NV memory such as EPROM, NOVROM, etc. do not directly impact system performance.
Can trend data be stored in this controller? Yes
How many total trend values can be stored? Up to 1000 trendlogs can be stored consisting of 1 point per log and 256 samples per point (for a total of 256,000 stored samples per controller)
What is the controllers role in trending? Programming resident within the BTI gathers and stores trend data on-board. At set intervals, data is sent by the BTI to a workstation for archival.
Can controller be programmed to 'push' data to archive or are trends 'pulled' from controller?
When full, does controller automatically send up trend data, overwrite data, or stop logging data? If controller trend data buffer fills before being called by archive workstation, old data is overwritten.
Programming Method(s) N.A.
Resident vs Non-Resident Program Execution N.A.
Resident Energy Management
Specific Pre-Programmed Algorithms Available
Additional Programming Functions N.A.
DDC Loops (P, PI, PID) N.A.
Automatic PID Tuning Feature N.A.
Automatical-Dial Alarm Support N.A.
Does controller perform multiple retries and buffer/store alarm until connection is made? N.A.
Are multiple destinations possible? N.A.
Upon controller power loss or hardware failure:
Are network communications affected? N.A.
Is loss recognized on/by the network and alarm reported? N.A.
DO and AO response?
Volatile memory functions?
Upon restoration of power does the controller:
Auto-reboot without operator intervention? N.A.
Automatically reset/synchronize the clock? N.A.
Update all monitored functions? N.A.
Generate an alarm if backup battery is dead? N.A.
Upon network or communications failure does controller:
Continue to operate standalone? N.A.
Operate with last global settings or user-specified value? N.A.
Do broken network segments continue to communicate within the remaining segment?
(Note: May depend on proper termination of segments for higher speed networks.)
Does network automatically reconfigure upon restoration? N.A.
Does network store 'loss of communications' alarm with time of event? N.A.
Additional Information (optional) N.A.
Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
Processor failure? N.A.
Internal hardware failure? N.A.
Open/shortened sensor? N.A.
Others? N.A.
Control Enclosure N.A.
Power Supply Required
Voltage 24 Vac
VA (10 VA)
Surge Protection Provided - Surge and lightning protection provided as standard feature. External 12v gel-cell battery provides additional power conditioning and noise filtering.
Underwriters Laboratories UL 916 PAZX (Energy Management)
FCC Part 15, Sub-Part J, Class A
CE EMC Directive 89/336/EEC (European CE Mark)
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided

Programming Method(s)

(See also 'Software' Form)

Alerton VisualLogic graphical programming. Optional menu-based set-up/configuration can be performed


(See also 'Software' Form)

Resident/Supervisory. This controller supervises the scheduling of other controllers. Up to 250 weekly schedules, 250 holiday schedules, and 250 event schedules can be stored in the BTI.

Energy Management

SI-resident energy management functions/algorithms calculated and performed by this SI. One or more of these choices may be selected. 'No' indicates that it is not available.

Energy management algorithms for this controller can be custom programmed.
Pre-programmed/built-in algorithms available, and are fully editable using custom programming.
Pre-programmed/built-in with limited editing via template-based programming.
SI is not typically used for energy management functions

Specific, pre-programmed algorithms available.

'No' indicates that it is not available.

None (custom programming only)
None (not applicable)
Optimal Start/Optimal Stop
Peak Demand Limiting/Load Shedding
Additional Energy Management functions resident at individual controllers
Other Tenant Activity Billing Program
Hardware I/O Points
Additional SI Functions

Automatic-Dial Alarm Support

(See also 'Software' Form)

The BTI-MDM provides autodial alarm support.
Does SI perform multiple retries and buffer/store alarm until connection is made? Yes
Are multiple destinations possible? Yes
Upon SI power loss or hardware failure:
Is loss recognized on/by the network and alarm reported? Yes
Upon restoration of power does the SI:
Auto-reboot without operator intervention? Yes
Automatically reset/synchronize its clock? No
Automatically reset/synchronize its secondary network? Yes
Update all monitored functions? Yes
Generate an alarm if backup battery is dead? No
Control Enclosure Provided - cover completely encloses unit with access wings for wiring terminations and network/port connections.