DDC Online direct digital controls
Staefa Control - MS 1800  

Smart II Plus DDC Controller; Smart II Plus VAV Controller; Smart II Plus Fan Coil Controller; Smart II Plus Heat Pump Controller; Smart II Plus MUX Controller

Secondary Control Units
Smart II Plus Controllers
Date Last Saved: 3/23/2004 3:12:48 PM

Product Name(s): Smart II Plus DDC Controller; Smart II Plus VAV Controller; Smart II Plus Fan Coil Controller; Smart II Plus Heat Pump Controller; Smart II Plus MUX Controller
Product Description: 10 to 16-point (depending on model) application specific controllers.
Product Application(s): DDC controller: 2 different models with flexible loop configurations for zone and mechanical equipment control applications. VAV controller: 4 different models providing for pressure dependent or independent control of single or dual-duct VAV boxes including fan-powered boxes. Also provides for HW reheat valve modulation or 3-stage electric reheat. Fancoil controller: 3 different models for control of fancoils, induction units, unit ventilators, or single zone AHUs. Heat pump: 2 different models for control of single or multi-stage water source heat pumps, single or multi-stage air to air heat pumps. Both models provide for ventilation or mixed air control. Can also be used for packaged air-conditioners. MUX: 1 model provides for expansion of the Smart II network. Provides for remote interface/control of motor control centers, lighting panels, and mechanical equipment/AHU's.
Point Quantity Characteristics
Analog Input (AI):
Digital Input (DI):
Universal Input (AI or DI): * 0-5 Vdc, thermistor, dry contact.

Also see 'Range Module' in 'Additional Features' below.
Analog Output (AO): * 0-10 Vdc, fiber optic
Digital Output (DO): * 24 Vac, 10VA, 400 mA, 4 Amp inrush

24 Vac to 115 Vac (6 SPDT) relay board available
Universal Output (UO):
Control Unit Model #:AIDIUIDOAOUOOther
DDC8662 8 6 2 DPS
DDC8660 8 6 2
VAV4601 4 6 DPS
VAV4603 4 6 SVP
VAV8661 8 6 2 DPS
VAV8663 8 6 2 SVP
VAV8653 8 6 1 Fiber optic & SVP
FNC4600 4 6
FNC8650 8 6 1 Fiber optic
FNC8660 8 6 2
HTP4600 4 6
HTP8660 8 6 2
MUX8660 8 6 2
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
D/A Converter Resolution
6 bit
8 bit
10 bit
No Analog Output
Other Information not provided.
HOA switches provided on each output?
Note: These are also available as an add-on from 3rd party vendors.
Both AO and DO
DO Only
Indicating status LED on each output?
AO and DO
AO Only
DO Only
Integral Flow Sensor? Yes
Integral Damper Actuator? No
Can controller accept occupant override from thermostat? Yes
Can controller accept occupancy sensor input? Information not provided.
Expander Boards
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
Proprietary EIA-485 @ 9.6 Kbps (polling) from NCRS trunk
External Communication Ports, Speeds and Access Devices RS232 Smart II Plus Service Tool port @ 9.6 Kbps
Additional Information (Optional) Up to 40 Smart IIs per trunk from SI.
Network Accessing Capabilities via Controller
Access controller only
Access controller plus additional controllers on network segment / LAN
Access all controllers on system
No access available on this controller
Other Information not provided.
Controller Access Devices
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Zone-Based Interface Access Smart II thermostat with port for proprietary service tool
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
HID (proprietary device)
PDA (3rd party HID, with software)
*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.
Functions Available Through Field Interface**:View ParamsChange ParamsChange
O&M SupportTAB/Cx Support
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Microprocessor(s) Information not provided
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization No clock
Volatile Memory (RAM) Capacity No RAM
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
Is Volatile Memory Supported By Battery? No RAM
Battery Type(s) None
Battery Life No battery
Backup Battery Operating Time No battery
Non-Volatile Memory Capacity (EEPROM/Flash)* None
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.
Can trend data be stored in this controller? No
How many total trend values can be stored? None
What is the controllers role in trending? No trending
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? No trending
Programming Method(s) Smart II Plus PC Tool software communicates to the Smart II Plus and SMVU controllers through the MS1800 workstations for upload/download of configuration data.
Resident vs Non-Resident Program Execution Information not provided
Resident/Supervisory. This controller supervises the scheduling of other controllers.
Resident/Stand Alone. This controller contains its own schedule.
Non-Resident. This controller is dependent upon another controller for its schedule.
None. This controller has no scheduling features.
Other Information not provided
Resident Energy Management
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
Controller is not typically used for energy management functions
Specific Pre-Programmed Algorithms Available
None (custom programming only)
None (not applicable)
Optimal Start/Optimal Stop
Peak Demand Limiting/Load Shedding
Economizer (enthalpy, dry-bulb, CO2, modulating/2-position, etc.)
Additional Energy Management functions are resident at SI
Additional Programming Functions
DDC Loops (P, PI, PID) PID
Automatic PID Tuning Feature Yes. Through MS1800 workstation.
Automatical-Dial Alarm Support Information not provided
Does controller perform multiple retries and buffer/store alarm until connection is made? Information not provided
Are multiple destinations possible? Information not provided
Upon controller power loss or hardware failure:
Are network communications affected? Information not provided
Is loss recognized on/by the network and alarm reported? Information not provided
DO and AO response?
Outputs fail to a user pre-specified position
Outputs fail to a normal (unpowered) position
Outputs fail to last position
Other Information not provided
Volatile memory functions?
Retained for life of backup battery
Other Information not provided
Upon restoration of power does the controller:
Auto-reboot without operator intervention? Information not provided
Automatically reset/synchronize the clock? Information not provided
Update all monitored functions? Information not provided
Generate an alarm if backup battery is dead? Information not provided
Upon network or communications failure does controller:
Continue to operate standalone? Information not provided
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.)
Information not provided
Does network automatically reconfigure upon restoration? Information not provided
Does network store 'loss of communications' alarm with time of event? Information not provided
Additional Information (optional)
Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
Processor failure? Information not provided
Internal hardware failure? Information not provided
Open/shortened sensor? Information not provided
Control Enclosure Provided - Constructed of UL 94C-0/5VA plenum rated plastic.
Power Supply Required
Voltage 24 Vac
VA 15 VA
Surge Protection Provided - Surge and transient protection circuitry for power and communications. Optical isolation provided for communication.
Underwriters Laboratories UL 916 PAZX (Energy Management)

UUKL 864 UDTZ (Smoke Control)

CUL (PAZX7) C22.2
FCC Information not provided
CE Information not provided
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided