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Automatic transfer switch controller · BACnet points list

Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX BACnet points list

Updated 12 November 2026

Short answer

Gateway profile for the Zenith MX200: 94 objects (22 AI, 14 AO, 46 BI, 12 BO), only 4 polled by default (not in auto, normal and emergency position, Modbus card error). The rest covers source availability, fault, exerciser and test states, limit switches, phase rotation, selector switches, voltages and frequencies, timer and pickup/dropout settings, and test/control outputs.

This page lists 94 BACnet objects for the Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX — 26 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Contemporary Controls’s own free documentation, linked below.

Manufacturer
Contemporary Controls
Model
GE Zenith Controls MX200 transfer switch controller via BASgatewayLX
Equipment
Automatic transfer switch controller
Equipment type
Other equipment
BACnet objects
94 (26 writable)
Transport
BACnet IP
Firmware
Not stated
Also known as
MX200, Zenith MX200, ZTS MX200, GE Zenith ATS
Source document
BASgatewayLX Modbus device profile GE_Zenith_Controls_MX200_a · GE_Zenith_Controls_MX200_a_LX.csv
Download CSV 94 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against Contemporary Controls’s current documentation and the live device before use. Not official Contemporary Controls information. Terms of use.

BMS integration notes: Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX

Integration in brief

Enable source available and fault bits, then read position and availability. Test and control outputs are unpolled; use them only for deliberate ATS testing.

Minimum points to map

The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.

ObjectNameWhyAccess
BI 28Normal Position StatusSwitch in normal positionRead
BI 29Emergency Position StatusSwitch in emergency positionRead
BI 8Normal Source availableNormal source availableRead
BI 7Emergency Source availableEmergency source availableRead
BI 2ATS Not in Auto modeATS not in autoRead
BI 3FaultFaultRead
BI 30MX200 - Mod Card Comm ErrorModbus card comm errorRead

Network setup

Watch out for

Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX BACnet objects

Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.

Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.

94 of 94 shown
Type
Access
Show
Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX BACnet Points List
DescriptionStates
BI1Automatic Transfer RelayModbus 000001; not polled by defaultRead
BImin2ATS Not in Auto modeModbus 000002Read
BImin3FaultModbus 000003; not polled by defaultRead
BI4Exerciser EnabledModbus 000004; not polled by defaultRead
BI5Load test runningModbus 000005; not polled by defaultRead
BI6Load No Load Fast Load Test statusModbus 000006; not polled by defaultRead
BImin7Emergency Source availableModbus 000007; not polled by defaultRead
BImin8Normal Source availableModbus 000008; not polled by defaultRead
BI9SN limit switchModbus 000009; not polled by defaultRead
BI10SE limit switchModbus 000010; not polled by defaultRead
BI11SNO limit switchModbus 000011; not polled by defaultRead
BI12SEO limit switchModbus 000012; not polled by defaultRead
BI13Emergency Phase RotationModbus 000013; not polled by defaultRead
BI14Normal Phase RotationModbus 000014; not polled by defaultRead
BI15Number of Phases on EmergencyModbus 000015; not polled by defaultRead
BI16Number of Phases on NormalModbus 000016; not polled by defaultRead
BI17S5 selector switchModbus 000018; not polled by defaultRead
BI18S12 selector switchModbus 000019; not polled by defaultRead
BI19Load Shed inputModbus 000020; not polled by defaultRead
BI20Q7 inputModbus 000021; not polled by defaultRead
BI21Q3 inputModbus 000022; not polled by defaultRead
BI22Auxiliary 2 InputModbus 000023; not polled by defaultRead
BI23Auxiliary 1 InputModbus 000024; not polled by defaultRead
BI24Timer Bit 0Modbus 000025; not polled by defaultRead
BI25Timer Bit 1Modbus 000026; not polled by defaultRead
BI26Timer Bit 2Modbus 000027; not polled by defaultRead
BI27Timer activeModbus 000033; not polled by defaultRead
BImin28Normal Position StatusModbus 000034Read
BImin29Emergency Position StatusModbus 000035Read
BImin30MX200 - Mod Card Comm ErrorModbus 000036Read
AI31Timer Countdown ValueModbus 400005; not polled by defaultRead
AI32Normal Voltage Ph1-Ph2Modbus 400006; not polled by defaultRead
AI33Normal Voltage Ph2-Ph3Modbus 400007; not polled by defaultRead
AI34Normal Voltage Ph3-PhlModbus 400008; not polled by defaultRead
AI35Emergency Voltage Ph1-Ph2Modbus 400009; not polled by defaultRead
AI36Emergency Voltage Ph2-Ph3Modbus 400010; not polled by defaultRead
AI37Emergency Voltage Ph3-PhlModbus 400011; not polled by defaultRead
AI38Normal Frequency (scaled value)Modbus 400013; not polled by defaultRead
AI39Emergency Frequency (scaled value)Modbus 400015; not polled by defaultRead
AI40Time On EmergencyModbus 400016; not polled by defaultRead
AI41Number of TransfersModbus 400017; not polled by defaultRead
AI42Serial Number - MSBModbus 400019; not polled by defaultRead
AI43Serial Number - LSBModbus 400020; not polled by defaultRead
AI44Nominal Full Scale Voltage ValueModbus 400021; not polled by defaultRead
BI45T3 Timer Bypass OptionModbus 000041; not polled by defaultRead
BI46T3 Timer OptionModbus 000042; not polled by defaultRead
BI47W3 Timer Bypass OptionModbus 000043; not polled by defaultRead
BI48W3 Timer OptionModbus 000044; not polled by defaultRead
BI49T Timer Bypass OptionModbus 000045; not polled by defaultRead
BI50W Timer Bypass OpiionModbus 000046; not polled by defaultRead
BI51In Phase Monitor/Closed TransitionModbus 000047; not polled by defaultRead
BI52ATS TypeModbus 000048; not polled by defaultRead
BI53S12 Auto/Manual OptionModbus 000049; not polled by defaultRead
BI54S5 AutQ/Manual Bypass OptIanModbus 000050; not polled by defaultRead
BI55Phase Sequence Check OptionModbus 000051; not polled by defaultRead
BI56Emq Over Frequency OptionModbus 000052; not polled by defaultRead
BI57tmg Over Voltage OptionModbus 000053; not polled by defaultRead
BI58Norm Over Frequency OptionModbus 000054; not polled by defaultRead
BI59Norm Under Frequency OptionModbus 000055; not polled by defaultRead
BI60Norm Over Vol]age OptionModbus 000056; not polled by defaultRead
AI61Normal Voltage Ph1-Ph2Modbus 400025; not polled by defaultRead
AI62Norrnal Vollage Ph2-Ph3Modbus 400026; not polled by defaultRead
AI63Normal Voltage Ph3-Ph1Modbus 400027; not polled by defaultRead
AI64EfTtBrgsncy Vollage Ph1-Ph2Modbus 400028; not polled by defaultRead
AI65Emergency Voltaoa PhZ-Pli3Modbus 400029; not polled by defaultRead
AI66Emergency Voltage Ph3-Ph1Modbus 400030; not polled by defaultRead
AI67Normal Period CountModbus 400031; not polled by defaultRead
AI68Emergency Period CountModbus 400032; not polled by defaultRead
AO69P TimeModbus 400033; not polled by defaultCommand
AO70W TimeModbus 400034; not polled by defaultCommand
AO71W3 TimeModbus 400035; not polled by defaultCommand
AO72DW TimeModbus 400036; not polled by defaultCommand
AO73T TimeModbus 400037; not polled by defaultCommand
AO74T3 TimeModbus 400038; not polled by defaultCommand
AO75DT TimeModbus 400039; not polled by defaultCommand
AO76U TimeModbus 400040; not polled by defaultCommand
AO77Normal Pickup VoltageModbus 400041; not polled by defaultCommand
AO78Normal Dropout VoltageModbus 400042; not polled by defaultCommand
AO79Emergency Pickup VoltageModbus 400043; not polled by defaultCommand
AO80Emergency Dropout VoltageModbus 400044; not polled by defaultCommand
AO81Normal Pickup FrequencyModbus 400045; not polled by defaultCommand
AO82Emergency Pickup FrequencyModbus 400046; not polled by defaultCommand
BO83YE ControlModbus 000068; not polled by defaultCommand
BO84YN ControlModbus 000069; not polled by defaultCommand
BO85No Load Test ControlModbus 000070; not polled by defaultCommand
BO86Load Test ControlModbus 000071; not polled by defaultCommand
BO87Fast Load Test ControlModbus 000072; not polled by defaultCommand
BO88S5 ControlModbus 000074; not polled by defaultCommand
BO89S12 ControlModbus 000075; not polled by defaultCommand
BO90LS ControlModbus 000076; not polled by defaultCommand
BO91Q7 ControlModbus 000077; not polled by defaultCommand
BO92Q3 ControlModbus 000078; not polled by defaultCommand
BO93AUX 2 ControlModbus 000079; not polled by defaultCommand
BO94AUX 1 ControlModbus 000080; not polled by defaultCommand
Object ID lookup: Contemporary Controls BASgatewayLX GE Zenith MX200 point IDs by name

Integration notes

Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the GE Zenith Controls MX200 transfer switch controller via BASgatewayLX and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.

Questions about the Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX

How many BACnet points does the Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX have?

This list has 94 BACnet objects: 22 analog inputs, 14 analog outputs, 46 binary inputs, 12 binary outputs. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX BACnet points are writable?

26 of the 94 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done. The source has no read/write column, so this is inferred from object type.

Where is the official Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX BACnet documentation?

The source is BASgatewayLX Modbus device profile GE_Zenith_Controls_MX200_a (GE_Zenith_Controls_MX200_a_LX.csv), published free by Contemporary Controls at https://www.ccontrols.com/support/dp/GE_Zenith_Controls_MX200.zip.

What are the minimum BACnet points to integrate the Contemporary Controls GE Zenith Controls MX200 transfer switch controller via BASgatewayLX?

Start with BI 28 Normal Position Status (Switch in normal position); BI 29 Emergency Position Status (Switch in emergency position); BI 8 Normal Source available (Normal source available); BI 7 Emergency Source available (Emergency source available); BI 2 ATS Not in Auto mode (ATS not in auto); BI 3 Fault (Fault); BI 30 MX200 - Mod Card Comm Error (Modbus card comm error).

How do I check these points on the real GE Zenith Controls MX200 transfer switch controller via BASgatewayLX?

Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.

More Contemporary Controls BACnet points lists

Source: BASgatewayLX Modbus device profile GE_Zenith_Controls_MX200_a · GE_Zenith_Controls_MX200_a_LX.csv. Object names, instances and units are reproduced as published; descriptions are our own.