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VLC-444; VLC-550; VLC-651R; VLC-660R; VLC-853; VLC-1188; VLC-1600; VLC-16160

Secondary Control Units
VLC (VisualLogic) Controller Series
Date Last Saved: 7/11/2011 3:37:36 PM

Product Name(s): VLC-444; VLC-550; VLC-651R; VLC-660R; VLC-853; VLC-1188; VLC-1600; VLC-16160
Product Description: The VLC-Series SCUs are programmable terminal equipment controllers that reside on the secondary polling network. Each model can be custom programmed, but is not expandable and has a variety of I/O options for common applications. They perform stand-alone operation (except for the VLC-1600) and come with libraries of application logic for common unitary equipment.
Product Application(s): The individual VLC-Series controllers are designed to support general HVAC applications, including AHUs, unitary equipment applications (such as heat pumps, fan coils, and rooftop units), hydronic distribution systems, and smaller chillers/boiler/central plant control functions.
Point Quantity Characteristics
Analog Input (AI): N.A.
Digital Input (DI): N.A.
Universal Input (AI or DI): See below 0-5 VDC / 4-20 mA

0-5 VDC / 4-20 mA or 0-10 VDC (VLC-853, VLC-1188, CLC-1600)

0-10 VDC / 4/20 mA (VLC-444 only)

Control range not provided by MFR for VLC-651R and VLC-660R.

Thermistor (3K or 10K) / Dry Contact

Single input (optional) from zone sensor (Microset, Microset II, Microtouch). Refer to specific product data for full compatibility details.

Pulse input accepted (VLC-1600: Inputs 1-3 only)
Analog Output (AO): See below 0-10 VDC or 4-20 mA (VLC-444: auto-sensing; VLC-853, VLC-1188: switch-selectable)

0-20 mA (VLC-651R: 4-20 mA can be achieved in software, 0-10 VDC can be achieved through on-board wiring)

VLC-444: 0 - 10 VDC (min load resistance = 1000 ohms)
4 - 20 mA (max load resistance = 550 ohms)

VLC-853, VLC-1188: 0 - 10 VDC (min load resistance = 500 ohms)
4 - 20 mA (max load resistance = 1000 ohms)
Digital Output (DO): See below Hot-Switched Triacs: each rated @ 24 VAC, 0.5 A (VLC-444,VLC-550, VLC-651R, VLC-660R, VLC-853)

Hot-Switched Triacs: each rated @ 24 VAC, 0.47 A (VLC-16160)

Optically Coupled Triacs: each rated @ 24 VAC, 0.5 A (VLC-1188 only)

Independently Isolated, Normally Open Relay Outputs: Motor load rating (120 VAC 3/4 HP - 277 VAC 3/4 HP), General purpose rating (120 VAC @ 15 A, 240/277 VAC @ 10 A) (VLC-651R, VLC-660R only)
Universal Output (UO):
Control Unit Model #:AIDIUIDOAOUOOther
VLC-444 4 4 4
VLC-550 5 5
VLC-651R 6 5 1
VLC-660R 6 6
VLC-853 8 5 3
VLC-1188 11 8 8
VLC-1600 16
VLC-16160 16 16
A/D Converter Resolution
8 bit
10 bit
12 bit VLC-444 only
16 bit
D/A Converter Resolution
6 bit
8 bit VLC-853 and VLC-1188
10 bit VLC-651R only
No Analog Output VLC-550, VLC-660R, VLC-1600, VLC-16160
Other 12-bit: VLC-444 only
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? No
Integral Damper Actuator? No
Can controller accept occupant override from thermostat? Yes
Can controller accept occupancy sensor input? Yes
Expander Boards
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1) - BACnet-MS/TP @ 9.6 - 76.8 kbps (polling)
External Communication Ports, Speeds and Access Devices None
Additional Information (Optional)
Network Accessing Capabilities via Controller
Access controller only via MFST
Access controller plus additional controllers on network segment / LAN
Access all controllers on system via FST-100
No access available on this controller
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 Microset, Microset II and Microtouch zone sensors have displays and pushbuttons for accessing controller parameters. Wall sensor with interface jack allows Microset Service Tool (Handheld Interface Device) access to controller parameters.
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
HID (proprietary device)
PDA (3rd party HID, with software)
Laptop/PC with FST-100
*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) Motorola AZ-60 with on-board flash memory.

ARM7 processor with on-board flash memory. (VLC-444 only)

VLC-444: ARM7 processor with on-board flash memory.

VLCA-1688: 32-bit processor, 4MB flash memory.
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization Clock synchronization is via standard BACnet Time_Synchronization message by workstation, or by any other device which can transmit standard BACnet Time_Synchronization.
Volatile Memory (RAM) Capacity Information not provided
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
Battery Type(s) N.A.
Battery Life N.A.
Backup Battery Operating Time N.A.
Non-Volatile Memory Capacity (EEPROM/Flash)* Information not provided
Non-Volatile Memory Uses
Data / Trends / Alarms / Calculation Storage
Configuration / Parameter Storage setpoints, parameters, user settings, schedules, etc.
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? N.A.
What is the controllers role in trending? Points attached to this controller can be trended, although controller takes no active role in 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? N.A.
Programming Method(s) Alerton VisualLogic graphical programming. Optional menu-based set-up/configuration can be performed.
Resident vs Non-Resident Program Execution Local control logic is resident and executed at the control unit. The BTI (SI) controls scheduling and global (system-wide) BAS control strategies.
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.
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) P, PI, and PID
Automatic PID Tuning Feature No
Automatical-Dial Alarm Support No
Does controller perform multiple retries and buffer/store alarm until connection is made? No
Are multiple destinations possible? No
Upon controller power loss or hardware failure:
Are network communications affected? No
Is loss recognized on/by the network and alarm reported? Yes
DO and AO response?
Outputs fail to a user pre-specified position
Outputs fail to a normal (unpowered) position
Outputs fail to last position
Volatile memory functions?
Retained for life of backup battery
Other All volatile memory functions written to EEPROM upon loss of power
Upon restoration of power does the controller:
Auto-reboot without operator intervention? Yes
Automatically reset/synchronize the clock? No
Update all monitored functions? No
Generate an alarm if backup battery is dead? No battery
Upon network or communications failure does controller:
Continue to operate standalone? Yes
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? Yes
Does network store 'loss of communications' alarm with time of event? No
Additional Information (optional)
Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
Processor failure? Yes
Internal hardware failure? Yes
Open/shortened sensor? Yes
Control Enclosure Provided as standard feature of product, UL Listed for Plenum Mounting.
Power Supply Required
Voltage 24 Vac
VA 5 VA to 20 VA minimums depending on VLC-Model (see individual product label).

10 VA to 220 VA maximums depending on VLC-Model (see individual product label).
Surge Protection Provided - Surge and lightning protection provided as standard feature.
Underwriters Laboratories UL 916 PAZX (Energy Management)
FCC Part 15, Subpart J, Class A
CE EMC Directive 89/336/EEC (European CE Mark)
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
No VLC-444 and VLCA-1688
Not submitted for testing
Information not provided
Other Suitable for plenum mounting (VLC-651R, VLC-660R, VLC-1188)