BACnet gateways

BAC2004-Lite

Converts field-controller and meter data into BACnet interfaces for point-list-based integration with building management systems. Provides 2 Ethernet ports, 4 serial ports, 1024-point capacity. Acquisition protocols: Modbus, BACnet; a Simulator driver is also included.

Serial ports4

RS485 ports4

Ethernet ports2

Acquisition protocol coverageListed protocols · Simulator / Modbus / BACnet

Acquisition protocolsSimulator / Modbus / BACnet

Forwarding protocolsBACnet/IP / BACnet MS/TP / OPC UA

Physical interfacesEthernet / RS485

Point capacity1024

Device capacity128

Built-in touchscreen—

HMI configuration—

USB Type-C power—

4G connectivity—

WiFi—

LoRaWAN—

Start using this model

Review the model documents, then prepare the files needed for connection and commissioning.

BAC2004-Lite

No related files are listed in this language. Contact technical support to confirm the documents you need.

General commissioning guide

Connection, point mapping, live-value checks and troubleshooting.

View general steps Confirm required files

Connection and configuration preparation

Review how devices connect, then prepare the field point list and supporting files.

01
Field devices
- Confirm the driver against the device brand, full model and communication documentation
02
Device-side acquisition
- Simulator
- Modbus
- BACnet
03
BAC2004-Lite
- Ethernet × 2
- RS485 × 4
04
System-side forwarding
- BACnet/IP
- BACnet MS/TP
- OPC UA
05
Compatible system types
- BACnet building management system
- OPC system

Arrows show connection order. Check model wiring instructions and the project point list for terminals, port assignments and read/write directions.

Communication roles

Acquisition side: Not specified in the records; verify against the field device and supervisory system
Forwarding side: Not specified in the records; verify against the field device and supervisory system

Recorded capacity

1024 points / 128 devices

Check before connecting

Check the device brand, model, driver version and interface. Use the wiring diagram to confirm terminals and port assignments.
Prepare a point list with addresses or objects, data types, byte order, units and read/write permissions.
Confirm the role at each end and the device address, serial settings, or IP address and port.
Check point count, device count and physical port count separately, then confirm capacity for the actual data volume.

Files for configuration

Model documentsNo dedicated file listed
Request
User manualNo dedicated file listed
Request
Wiring diagramNo dedicated file listed
Request
Configuration tools and supporting filesNo dedicated file listed
Request

Statuses reflect files associated in the current language. Contact technical support with this model to confirm other supporting resources.

How to choose within a series

Match device-side protocols and the host system first, then check ports, wireless connections and capacity. Candidates below use confirmed model specifications.

Current model groupBAC2004

You need multiple serial and Ethernet protocols

Check models confirmed to cover all acquisition protocols for serial and Ethernet connections. Check protocol scope and physical port counts separately. Confirm dedicated CAN, KNX TP and 2-wire MBus connections for the specific model.

Confirmed candidates4 models

BAC2004-A9
All serial and Ethernet acquisition protocols
Forwarding: BACnet/IP / BACnet MS/TP / OPC UA
BAC2004-ARM
All serial and Ethernet acquisition protocols
Forwarding: BACnet/IP / BACnet MS/TP / OPC UA
BAC2004-ARM-E
All serial and Ethernet acquisition protocols
Forwarding: BACnet/IP / BACnet MS/TP / OPC UA

Show 1 more models

BAC2004-ARM-SC
All serial and Ethernet acquisition protocols
Forwarding: BACnet MS/TP / BACnet/SC / OPC UA

View full group specifications

The device protocol is fixed

Check each model’s listed acquisition protocols and the required host-system protocol. A model suffix alone does not establish equivalent acquisition capability.

Confirmed candidates2 models

BAC2004-Lite
Listed acquisition protocols: Modbus / BACnet
Forwarding: BACnet/IP / BACnet MS/TP / OPC UA
BAC2004-Lite-E
Listed acquisition protocols: Modbus RTU
Forwarding: BACnet/IP / BACnet MS/TP / OPC UA

View full group specifications

This guidance narrows the candidates. Confirm communication roles, read/write direction, the point list, wiring and model-specific resources before final selection.

“Unconfirmed” means documentation does not establish a value; it does not mean zero or unsupported.

Overview & technical information Selection checklist FAQ (1)Related content

Product overview

Key functions

BACnet network routing

Supports transparent routing between BACnet MS/TP buses and BACnet/IP networks to interconnect their devices.

COV and cross-subnet access

Supports COV subscriptions and BBMD cross-subnet access for change notifications and BACnet network integration.

BACnet alarms and events

Provides BACnet alarm and event functions for monitoring objects configured from the field point list.

Data-format processing

Supports linear scaling, bit extraction and byte-order conversion to handle different device data formats.

Scripts and triggers

Use JS scripts and triggers for required control logic alongside the configured communication points.

Web monitoring and operation

Use built-in web pages to view, configure and monitor device data during commissioning and operation.

Connections and integration

Device-side acquisition: Modbus, BACnet. System-side interfaces: BACnet/IP, BACnet MS/TP, OPC UA. Configure the device roles and point mappings for the installation.

Typical applications

Building-device integration and centralized monitoring; Lighting-device connectivity and management; Field-meter data integration.

Model selection essentials

Model configuration: 2 Ethernet ports, 4 RS485 channels, 1024 points, 128 devices.

Current product specifications

Specifications are sourced from the supplied 2026 product catalog. Unspecified values remain unconfirmed.

Parameter	Specification
Total serial ports	4
RS485 ports	4
Ethernet ports	2
Point capacity	1024
Device capacity	128
Acquisition protocols	Simulator / Modbus / BACnet
Forwarding protocols	OPC UA / BACnet/IP / BACnet MS/TP
Physical interfaces	Ethernet / RS485

Model datasheets

File unavailable in this language

Selection checklist

Confirm before selecting

Protocol compatibility is the first step. Check the device model, communication roles, point count and wiring. Capabilities that are not documented require confirmation.

Not yet documented：Acquisition roles / Output roles / RS232 ports / CAN ports / KNX TP ports / Two-wire MBus ports / DI digital inputs / DO digital outputs / AI analog inputs / AO analog outputs / USB Type-C power / 4G connectivity / WiFi / LoRaWAN / HMI configuration / Built-in touchscreen / Product type

Continue filtering and comparing

Related FAQs

Find configuration and usage guidance linked to this content. Refer to documentation for the exact model and version.

What does X mean, and how do acquisition and forwarding protocols differ?

X denotes the acquisition-side protocols. Also check forwarding protocols, communication roles, physical interface types and port counts.

Read the full answer

BAC2004-Lite

Start using this model

General commissioning guide

Field devices

Device-side acquisition

BAC2004-Lite

System-side forwarding

Compatible system types

Communication roles

Recorded capacity

Check before connecting

Files for configuration

How to choose within a series

You need multiple serial and Ethernet protocols

The device protocol is fixed

Product overview

Key functions

BACnet network routing

COV and cross-subnet access

BACnet alarms and events

Data-format processing

Scripts and triggers

Web monitoring and operation

Connections and integration

Typical applications

Model selection essentials

Current product specifications

Model datasheets

Selection checklist

Related FAQs

Related content

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BAC2000-ARM-E

BAC1002-MBus

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