MNB-CNTLR-1000

Configured for BACnet MS/TP plant control execution in the Schneider Electric I/A Series MicroNet building automation network, the Schneider Electric MNB-CNTLR-1000 (MNB-1000 BACnet Plant Controller) provides direct physical and electrical control of HVAC field I/O signals, relay outputs, and RS-485 network communication.

Hardware Specifications

Parameter	Specification
Model	MNB-CNTLR-1000 / MNB-1000
Brand	Schneider Electric (TAC / Invensys I/A Series)
Weight	1.95 lbs
Operating Temp	0 deg C to 50 deg C
Power Consumption	Approx. 30 VA to 50 VA depending on expanded I/O loads
Device Type	BACnet MS/TP Plant Controller / BACnet Building Controller (B-BC)
Communication Protocol	BACnet MS/TP over RS-485
Supported Baud Rates	9.6 kbps, 19.2 kbps, 38.4 kbps, 76.8 kbps
Power Supply	24 VAC +/-20%, 50/60 Hz
Universal Inputs	8 channels, supporting 0-10 VDC, 0-20 mA, thermistor, and resistance signals
Digital Inputs	4 channels, dry contact and pulse counting
Analog Outputs	4 channels, 0-10 VDC
Digital Outputs	8 relay outputs, Form A, 24 VAC / 30 VDC, 1 A
I/O Expansion	Supports MNB-Ix series expansion modules
Processor	32-bit microprocessor with flash memory
Real-Time Clock	Integrated RTC with battery backup
Programming Environment	WorkPlace Tech Tool (WPT)
Humidity Range	5% to 95% RH, non-condensing
Enclosure Rating	NEMA 1 / IP20 equivalent
Mounting Type	Panel mount or DIN rail mount
Certifications	UL 916, CE, FCC Part 15 Class A, BTL Listed

BACnet MS/TP Network and Plant Control Functions

The MNB-1000 communicates through BACnet MS/TP using an RS-485 physical interface with selectable baud rates for network integration. The controller executes local control sequences, scheduling functions, trend storage, and logic operations through WorkPlace Tech Tool programming.

The controller handles direct field signal processing through universal inputs, analog outputs, digital inputs, and relay outputs. The onboard processor and non-volatile flash memory maintain application programs, configuration parameters, and network settings during power interruption.

Frequently Asked Questions

Q: What communication interface is provided by the MNB-CNTLR-1000?
A: The controller uses a BACnet MS/TP communication interface based on RS-485 physical signaling.

Q: Can the MNB-1000 operate without a supervisory controller?
A: Yes. The controller supports standalone execution of programmed logic, schedules, trends, and local control functions.

Q: What type of I/O expansion is supported by the controller?
A: The MNB-1000 supports additional I/O capacity through MNB-Ix series expansion modules.

Field Installation Guidelines

Install the controller on a suitable panel surface or DIN rail location with sufficient clearance for field wiring access. Separate RS-485 communication wiring from high-voltage power conductors to reduce electrical interference.

Connect the 24 VAC supply according to the controller wiring requirements and verify polarity where applicable. Use shielded communication cable for BACnet MS/TP networks when required by site wiring practices, with cable shielding connected according to the installation grounding standard.

Terminate RS-485 network segments according to BACnet MS/TP wiring rules. Verify input signal types before connecting field devices to universal input channels to prevent incorrect scaling or signal interpretation.

Configure application logic, network parameters, and I/O assignments through WorkPlace Tech Tool after physical installation and wiring verification.

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