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Network Control Module (NCM) 350

Supervisory Interface Devices
Network Control Module (NCM)
Date Last Saved: 1/26/2004 10:59:08 AM

Product Name(s): Network Control Module (NCM) 350
Product Description: The NCM350 is a supervisory interface that provides global control functions and communications for the controllers located on it's attached secondary (N2) network. The NCM-350 has an integral base, allowing mounting in a variety of enclosure types. An older version (NCM300) is compatible only with the earlier ARCNET N1 primary network. The 350 is compatible with IP-based (Ethernet) primary networks or with the older ARCNET N1. Typical installations now use the NCM350 as a standalone SI and use the DX-Series general-purpose controller for I/O and loop control. Earlier installations made use of the 'NCU' , which consisted of an NCM, an enclosure, and Digital Control and I/O Modules (DCM and I/OM). Together, this assembly was a multi-purpose controller designed for primary/secondary network supervisory interface, and for primary control using DCM and I/O modules. The DCM connects to an internal; N2 Bus at 9.6 kbps. This latter option (NCM+DCM) is still achievable for applications requiring higher-level control - contact Johnson Controls for further information.
Product Application(s): An NCM (or alternately, an N30 BACnet-based SI) is required for all installations to supervise controller operations on the secondary network. Multiple NCMs located throughout the facility are connected via a primary network (the N1 Bus) to share their information. Any NCM can access information peer-to-peer from another NCM or any other SCU on the network.
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) - N1 Bus: Proprietary/IP@ 10 Mbps. (Alternately, the NCM can be configured to communicate with the older ARCNET N1 Bus @ 2.5 Mbps)

(1) - N2 Bus: Proprietary @ 9.6 kbps;OR

LonBus: LON via FTT-10A transceiver @ 78 kbps
External Communication Ports, Speeds and Access Devices (3) - RS-232 serial ports @ up to 19.2 kbps used for workstation, modem, terminal, printer, or second N2 bus depending on configuration and hardware.
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) Intel 80386 @ 16 MHz
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization The lowest-numbered NCM in the system contains the master time for the rest of the network.
Volatile Memory (RAM) Capacity 8 MB (total memory)
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? Yes
Battery Type(s) Rechargeable. Further information not provided.
Battery Life Shelf life disconnected is 10 years. Typical working life with power available is 5 years.
Backup Battery Operating Time 72 hours
Non-Volatile Memory Capacity (EEPROM/Flash)* There is 8 MB total memory provided, but partitioning between RAM and NV is not specified.
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? Yes
How many total trend values can be stored? Up to RAM limit.
What is the controllers role in trending? Programming resident within the NCM gathers and stores trend data on-board. At set intervals, data is sent by the NCM to 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? Information not provided
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 120 Vac
VA 60 VA maximum, 25 VA (typ.)
Surge Protection Built in AC surge protection circuitry on the NCM is rated to withstand surges of up to 6 kV @ 3 kA (IEEE 587 standard). External surge protection is unnecessary, except in cases of extreme lightning or high-voltage environments.
Underwriters Laboratories UL 916

UL 864 (for Fire and Smoke Models Only)
FCC Part 15, Sub-Part B, Class A
CE C22.2
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)

The NCM is programmed using M-Tools Graphical Programming Language (GPL) or line-based JCBasic


(See also 'Software' Form)

The NCM also executes programs for expanded control of secondary control units residing on the connected N2 network and stores trend and history data for their points.

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
Hardware I/O Points Optional: The addition of Multiplex Modules (XMs) or a DCM and associated Function Modules (FMs) and to the NCM allows for a wide array of I/O options and control functions. Multiplex Modules provide for digital I/O without the addition of a DCM. Function Modules require a DCM and include 12 bit A/D resolution and 10 bit D/A resolution. Modules can be chosen to include:

AI: 4- 20 mA; 0 - 10 Vdc; RTD; Pressure

DI: Contacts, Voltage threshold; Pulse

AO: 4- 20 mA; 0 - 10 Vdc; Pneumatic

DO: Triac, Relays, Solenoid
Additional SI Functions I/O features include HOA switches and LEDs.

Automatic-Dial Alarm Support

(See also 'Software' Form)

Available using optional equipment.
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? Yes
Automatically reset/synchronize its secondary network?
Update all monitored functions? Yes
Generate an alarm if backup battery is dead? Yes
Control Enclosure A variety of enclosures are available from the manufacturer