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Compare models in a series

Explore model variants side by side. Compare acquisition scope, forwarding protocols and physical ports, then open a model for its full specifications and documents.

Select by requirements

Model seriesFind a model

6 matching models · 219 in the catalog

Showing 1–4 of 6

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.

Compare models in a series
ModelDevice acquisition → System forwarding	BAC2004-A9Add to comparison	BAC2004-ARMAdd to comparison	BAC2004-ARM-EAdd to comparison	BAC2004-ARM-SCAdd to comparison
01Acquisition scopeDevice side	All acquisition protocols for serial and Ethernet connections	All acquisition protocols for serial and Ethernet connections	All acquisition protocols for serial and Ethernet connections	All acquisition protocols for serial and Ethernet connections
02Forwarding protocolsSystem side	BACnet/IPBACnet MS/TPOPC UA	BACnet/IPBACnet MS/TPOPC UA	BACnet/IPBACnet MS/TPOPC UA	BACnet MS/TPBACnet/SCOPC UA
Point capacity	2048	1024	1024	1024
Device capacity	128	128	128	128
Ethernet ports	2	2	2	2
Total serial ports	4	4	4	4
RS485	4	4	4	4
RS232	—	—	—	—
CAN ports	—	—	—	—
KNX TP ports	—	—	—	—
Two-wire MBus ports	—	—	—	—
DI channels	—	—	—	—
DO channels	—	—	—	—
AI channels	—	—	—	—
AO channels	—	—	—	—
Touchscreen	—	—	—	—
Model documents	Port and model notes Supported acquisition protocols: more than 500 protocols. Specifications & downloads	Port and model notes Supported acquisition protocols: more than 500 protocols. Specifications & downloads	Port and model notes Supported acquisition protocols: more than 500 protocols. Specifications & downloads	Port and model notes Supported acquisition protocols: more than 500 protocols. Specifications & downloads

BAC2004-A9Add to comparison

01Acquisition scopeDevice side

All acquisition protocols for serial and Ethernet connections

02Forwarding protocolsSystem side

BACnet/IPBACnet MS/TPOPC UA

Point capacity: 2048
Device capacity: 128
Ethernet ports: 2
Total serial ports: 4
RS485: 4
RS232: —
CAN ports: —
KNX TP ports: —
Two-wire MBus ports: —
DI channels: —
DO channels: —
AI channels: —
AO channels: —
Touchscreen: —

Port and model notes

Supported acquisition protocols: more than 500 protocols.

Specifications & downloads

BAC2004-ARMAdd to comparison

01Acquisition scopeDevice side

All acquisition protocols for serial and Ethernet connections

02Forwarding protocolsSystem side

BACnet/IPBACnet MS/TPOPC UA

Point capacity: 1024
Device capacity: 128
Ethernet ports: 2
Total serial ports: 4
RS485: 4
RS232: —
CAN ports: —
KNX TP ports: —
Two-wire MBus ports: —
DI channels: —
DO channels: —
AI channels: —
AO channels: —
Touchscreen: —

Port and model notes

Supported acquisition protocols: more than 500 protocols.

Specifications & downloads

BAC2004-ARM-EAdd to comparison

01Acquisition scopeDevice side

All acquisition protocols for serial and Ethernet connections

02Forwarding protocolsSystem side

BACnet/IPBACnet MS/TPOPC UA

Point capacity: 1024
Device capacity: 128
Ethernet ports: 2
Total serial ports: 4
RS485: 4
RS232: —
CAN ports: —
KNX TP ports: —
Two-wire MBus ports: —
DI channels: —
DO channels: —
AI channels: —
AO channels: —
Touchscreen: —

Port and model notes

Supported acquisition protocols: more than 500 protocols.

Specifications & downloads

BAC2004-ARM-SCAdd to comparison

01Acquisition scopeDevice side

All acquisition protocols for serial and Ethernet connections

02Forwarding protocolsSystem side

BACnet MS/TPBACnet/SCOPC UA

Point capacity: 1024
Device capacity: 128
Ethernet ports: 2
Total serial ports: 4
RS485: 4
RS232: —
CAN ports: —
KNX TP ports: —
Two-wire MBus ports: —
DI channels: —
DO channels: —
AI channels: —
AO channels: —
Touchscreen: —

Port and model notes

Supported acquisition protocols: more than 500 protocols.

Specifications & downloads

“—” means the documentation does not establish a value; 0 is a confirmed zero. Check model documentation for shared ports, options and protocol roles.