Control Solutions’ AddMe III Model AM3-SB Programmable I/O for BACnet MS/TP is a BACnet Application Specific Controller (B-ASC) with 32 I/O points and programmable control. The AM3-SB features 18 analog/universal inputs with configurable type and scaling. You can individually configure each universal input for high resolution analog, fast analog, or discrete input. When configured as an analog input, the continuously self-calibrating sigma-delta converter produces 15-bit resolution with high noise immunity. When configured as a discrete or fast analog input, the converter switches to 10-bit resolution at 128 samples per second for fast response. All I/O points are accessed as BACnet objects (AI, AO, BO).

The AddMe III a;sp features 8 discrete outputs with Form A dry contact relays and HOA switches, 4 analog outputs sourcing 4-20mA, and 2 discrete inputs with pulse count capability to 5kHz.

Feature Highlights
• 18 Analog/Universal Inputs, 16-bit, Configurable as 0-10VDC, Thermistor, Dry Contact
• 4 Analog Outputs, 8-bit, 0-20mA (or 4-20mA)
• 8 Discrete Outputs, Form A Relay, 5A @ 120VAC, HOA Switches
• 2 Discrete Inputs, Pulse Count to 5kHz
• BACnet MS/TP 9600 to 76,800 Baud

AM3-SB Programmable I/O for BACnet MS/TP

AddMe® III AM3-SB Network I/O for BACnet MS/TP

Order code: AM3-SB
Retail price: $979.00

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Control Solutions’ AddMe III features 18 universal inputs which are context sensitive. When configured as an analog input, the continuously self-calibrating sigma-delta converter produces 15-bit resolution with high noise immunity. When configured as a discrete input, the converter switches to 8-bit resolution at 128 samples per second for fast response. All I/O points are accessed as BACnet objects.

Analog Input objects provide data from the analog I/O points. Linearization tables are provided for 10K and 20K type II, III, and IV thermistors. Input type and scaling is configured by writing to object properties. Analog and Binary Output objects provide BACnet access to the outputs. An additional 60 writeable Multistate Input objects are available for use by the user's program.

The AM3-SB configuration tool connects to the MS/TP network using the MTX002 MS/TP to USB adapter (if not using a BACnet IP router). This intelligent adapter plugs into your PC's USB port, and offloads the MS/TP token passing from the PC to make it more reliable. The MTX002 allows you to connect your PC to an MS/TP network running at 76800 baud, something not possible with a generic RS-485 port adapter.

The MTX002 functions as an MS/TP device itself. The combination of the MTX002 and configuration tool running on your PC will appear on the network as a discoverable BACnet device. The diagnostic section in the configuration tool can be used to read and write any objects in any MS/TP device on the network. The configuration tool provides a template for reading and writing the multiple properties per BACnet object that define its configuration or client/server mapping. All configuration parameters exist as properties of BACnet objects which are accessible to any BACnet client. The Control Solutions configuration tool simpy provides a user friendly template for accessing those properties.

Screen shot from AM3-SB Programmable I/O for BACnet MS/TP configuration tool

The AM3-SB Configuration Tool is a user friendly configuration tool that provides a simple template for assigning the BACnet object properties that configure the device. Connect the AM3-SB to your laptop via a USB to MS/TP adapter (MTX002) or via a BACnet IP router.

i.CanDrawIt® is available at no additional cost for use with AddMe III controllers from Control Solutions. i.CanDrawIt® works just like an electrical schematic CAD program, except you draw control programs that look like circuits. The resulting software will function like the circuit you draw. i.CanDrawIt® includes visual program simulation as well as visual live debugging where supported by the target device. Set breakpoints or step through the program one visual function block at a time. Update variables and I/O objects in simulation or live.


AM3-SB Features

• 18 Analog/universal inputs
    • 0-10VDC, Thermistor, dry contact
    • Software selectable input type
    • 0.1% reference, up to 16-bit resolution
    • Continuously self-calibrating sigma-delta converter
• 4 Analog outputs
    • 4-20mA (0-20mA)
    • 8-bit resolution
• 8 Discrete outputs
    • Form A relay, 5A @ 120VAC
    • HOA switches & LED status indicators
• 2 Pulse/Discrete inputs
    • TTL to 24VDC
    • Rate or totalizing count input
• BACnet MS/TP Slave
• Supports 9600, 19200, 38400, and 76800 baud
• Powered by 18-30VDC or 24VAC 50/60 Hz
• Power Consumption:
    • 0.3A @ 24VDC max.
• DIN rail mounting, 100mm H x 155mm W x 60mm D
• LED indicators for power, RS-485 RX/TX & error
• Pluggable screw terminal blocks
• -30C to +70C, 5%-95% RH non-condensing
• Certifications: FCC, CE

Objects Provided
• 40 Analog Input (20 uncommitted, writeable)
• 4 Analog Output (commandable)
• 8 Binary Output (commandable)
• 60 Multistate Input (60 uncommitted, writeable)
• 1 Device
• 2 File
• 1 Program


• AM3-SB Support Package
Contains configuration tool software, USB driver, documentation.

• Download Copy of AM3-SB Online Help

• BACnet Tutorial
Introduction to BACnet

Our most extensive technical support is provided by the same engineering staff that developed the products. Your personal attention from this staff is available via the support ticket system.

No user/password is required to open a new ticket. Once you open a ticket, you will immediately receive an email with your ticket number. Your ticket number becomes your login to review your ticket(s) later. Click the Support Ticket icon anywhere you see it. (If you do not get an email with your ticket number, within minutes, check your junk folder, spam settings, etc, and try again if necessary.)

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