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EWIO2 Ethernet I/O with BACnet server

I/O module (Ethernet, BACnet IP server) · BACnet points list

METZ CONNECT EWIO2 Ethernet I/O with BACnet server BACnet points list

Updated 12 November 2026Unofficial source

Short answer

The EWIO2 is an Ethernet I/O controller that runs a BACnet IP server. It exposes its relays, triacs and transistor outputs as Binary Outputs, three 0-10 V outputs as Analog Outputs, eight digital inputs (with debounce, frequency and counter objects), three universal inputs with selectable sensor types, a user-defined sensor table, an output watchdog and Modbus port settings. Extension modules, trend logs and M-Bus / Modbus data points add further objects.

This page lists 72 BACnet objects for the METZ CONNECT EWIO2 Ethernet I/O with BACnet server — 47 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from a copy of METZ CONNECT’s documentation hosted by BACnet International, not by METZ CONNECT itself, so treat it as unofficial.

Manufacturer: METZ CONNECT
Model: EWIO2 Ethernet I/O with BACnet server
Equipment: I/O module (Ethernet, BACnet IP server)
Equipment type: Other equipment
BACnet objects: 72 (47 writable)
Transport: BACnet IP
Firmware: BACnet server v2.1.6
Default device instance: 421000
Also known as: EWIO2, EWIO2-BM, EWIO2-W-BM, EWIO2-M-BM, EWIO2-MW-BM, 110904, 110909, 110935, 110934, METZ EWIO2 BACnet
Source document: PICS Bacnet-Server v2.1.6 (EWIO2) · PICS_Bacnet-Server_v2.1.6 (unofficial copy, hosted by BACnet International)

Download CSV 72 rows Download EDE B.I.G.-EU JSON Source PDF (unofficial copy) ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

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

BMS integration notes: METZ CONNECT EWIO2 Ethernet I/O with BACnet server

Integration in brief

Give the EWIO2 a unique device instance (default 421000), set each universal input's range (MSV 0-2) and, if outputs must fail safe, the watchdog time (AV 9). Command the outputs through their priority arrays and read the inputs.

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.

Object	Name	Why	Access
BO 0	Relay K1	Relay K1 command	Command
AO 0	Voltage Output O1	0-10 V output O1, 0-102.4 %	Command
AV 9	Watchdog Time	Output watchdog time, s (0 = off)	Write
AI 0	Analog Input E1	Universal input E1 value	Read
BI 0	Binary Input DI1	Digital input DI1	Read
AI 30	Counter DI1	Pulse counter DI1	Read
BV 0	MR Device Driver Status	Extension module fault, active = fault	Read

Heartbeat & communication loss

AV 9 Watchdog Time (default 0 = off, up to 655.35 s). Any received BACnet APDU restarts it; on timeout all output priority arrays are cleared and outputs go to their relinquish defaults.

Network setup

Default device instance 421000; device name default 'EWIO2_BACnet'.
Universal input type set in MSV 0-2 (default 3 = 0-10 V).
Digital input debounce in PIV 0-7 (default 8 ms; 20-50 ms suggested for contacts).

Watch out for

Hand/auto keys on the unit override outputs; the BACnet Present_Value then does not show the real output, check Feedback_Value / OVERRIDDEN.
Counter AIs carry 64-bit counts but only 24-bit precision as analog values.

METZ CONNECT EWIO2 Ethernet I/O with BACnet server 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.

72 of 72 shown

Type

Multi-stateOther

Access

Units

Show

METZ CONNECT EWIO2 Ethernet I/O with BACnet server BACnet Points List
			Description			States
AImin	0	Analog Input E1	Input E1 value, range per MSV 0	Per MSV range	Read
AI	1	Analog Input E2	Input E2 value, range per MSV 1	Per MSV range	Read
AI	2	Analog Input E3	Input E3 value, range per MSV 2	Per MSV range	Read
AI	10	Analog Input E1 Raw	Input E1 raw measurement (diagnostic)		Read
AI	19	ADC Noise	ADC noise, 0-255 (diagnostic)		Read
AI	20	Frequency DI1	Frequency on digital input 1, 0.1-2000	Hz	Read
AI	21	Frequency DI2	Frequency on digital input 2, 0.1-2000	Hz	Read
AI	22	Frequency DI3	Frequency on digital input 3, 0.1-2000	Hz	Read
AI	23	Frequency DI4	Frequency on digital input 4, 0.1-2000	Hz	Read
AI	24	Frequency DI5	Frequency on digital input 5, 0.1-2000	Hz	Read
AI	25	Frequency DI6	Frequency on digital input 6, 0.1-2000	Hz	Read
AI	26	Frequency DI7	Frequency on digital input 7, 0.1-2000	Hz	Read
AI	27	Frequency DI8	Frequency on digital input 8, 0.1-2000	Hz	Read
AI	28	Supply Voltage	Supply voltage, 20-24 (diagnostic)	V	Read
AI	29	Device Temperature	Device temperature, 0-75 (diagnostic)	°C	Read
AImin	30	Counter DI1	Pulse counter on digital input 1		Read
AI	31	Counter DI2	Pulse counter on digital input 2		Read
AI	32	Counter DI3	Pulse counter on digital input 3		Read
AI	33	Counter DI4	Pulse counter on digital input 4		Read
AI	34	Counter DI5	Pulse counter on digital input 5		Read
AI	35	Counter DI6	Pulse counter on digital input 6		Read
AI	36	Counter DI7	Pulse counter on digital input 7		Read
AI	37	Counter DI8	Pulse counter on digital input 8		Read
BImin	0	Binary Input DI1	Digital input 1 (switch contact)		Read	Inactive=off, Active=on
PIV	0	Debounce Time DI1	Debounce time of digital input 1, default 8	ms	Write
AOmin	0	Voltage Output O1	0-10 V output O1 (0-102.4 %)	%	Command
BOmin	0	Relay K1	Relay K1 output (6-relay / 2-triac type)		Command	Inactive=off, Active=on
BO	1	Relay K2	Relay K2 output (6-relay / 2-triac type)		Command	Inactive=off, Active=on
BO	2	Relay K3	Relay K3 output (6-relay / 2-triac type)		Command	Inactive=off, Active=on
BO	3	Triac T1	Triac T1 output (6-relay / 2-triac type); Relay K4 on the 4-relay type		Command	Inactive=off, Active=on
BO	4	Triac T2	Triac T2 output (6-relay / 2-triac type)		Command	Inactive=off, Active=on
BO	5	Relay K4	Relay K4 output (6-relay / 2-triac type)		Command	Inactive=off, Active=on
BO	6	Relay K5	Relay K5 output (6-relay / 2-triac type)		Command	Inactive=off, Active=on
BO	7	Relay K6	Relay K6 output (6-relay / 2-triac type)		Command	Inactive=off, Active=on
BO	10	Transistor Output D1	24 V PNP transistor output D1, 20 mA		Command	Inactive=off, Active=on
BO	11	Transistor Output D2	24 V PNP transistor output D2, 20 mA		Command	Inactive=off, Active=on
BO	12	Transistor Output D3	24 V PNP transistor output D3, 20 mA		Command	Inactive=off, Active=on
BO	13	Transistor Output D4	24 V PNP transistor output D4, 20 mA		Command	Inactive=off, Active=on
MV	0	Measurement Range E1	Sensor / signal type of input E1, default 3		Write	1=0-10V %, 2=0-5V % Pullup, 3=0-10 Volt, 4=0-5 Volt Pullup, 5=Ohm, 6=User Defined, 7=PT100, 8=PT500, 9=PT1000, 10=NI1000-TC5000, 11=NI1000-TC6180, 12=BALCO500, 13=KTY81_110, 14=KTY81_210, 15=NTC1k8 Thermokon, 16=NTC5k Thermokon, 17=NTC10k Thermokon, 18=NTC20k Thermokon, 19=LM235Z, 20=NTC10k Carel, 21=NTC5k Schneider, 22=NTC30k Schneider, 23=KP250, 24=Poti 10k %, 25=Inactive, 26=0-20mA %, 27=0-20mA, 28=4-20mA %, 29=4-20mA, 30=3-wire sensing, 31=4-wire sensing, 32=40 Ohm - 14 kOhm, 33=12 kOhm - 4 MOhm, 34=40 Ohm - 650 Ohm, 35=500 Ohm - 14 kOhm, 36=12 kOhm - 180 kOhm, 37=140 kOhm - 4 MOhm
AVmin	9	Watchdog Time	Output watchdog, 0 = off, max 655.35	s	Write
AV	20	X 1	User sensor table point 1, X (input value)		Write
AV	21	Y 1	User sensor table point 1, Y (measured signal)		Write
AV	22	X 2	User sensor table point 2, X (input value)		Write
AV	23	Y 2	User sensor table point 2, Y (measured signal)		Write
AV	24	X 3	User sensor table point 3, X (input value)		Write
AV	25	Y 3	User sensor table point 3, Y (measured signal)		Write
AV	26	X 4	User sensor table point 4, X (input value)		Write
AV	27	Y 4	User sensor table point 4, Y (measured signal)		Write
AV	28	X 5	User sensor table point 5, X (input value)		Write
AV	29	Y 5	User sensor table point 5, Y (measured signal)		Write
AV	30	X 6	User sensor table point 6, X (input value)		Write
AV	31	Y 6	User sensor table point 6, Y (measured signal)		Write
AV	32	X 7	User sensor table point 7, X (input value)		Write
AV	33	Y 7	User sensor table point 7, Y (measured signal)		Write
AV	34	X 8	User sensor table point 8, X (input value)		Write
AV	35	Y 8	User sensor table point 8, Y (measured signal)		Write
AV	36	X 9	User sensor table point 9, X (input value)		Write
AV	37	Y 9	User sensor table point 9, Y (measured signal)		Write
AV	38	X 10	User sensor table point 10, X (input value)		Write
AV	39	Y 10	User sensor table point 10, Y (measured signal)		Write
MV	18	User Defined Range	Signal type for the user-defined sensor		Write	1=Volt linear, 2=Volt Pullup linear, 3=Ohm linear, 4=mA linear, 5=Volt exp, 6=Volt P exp, 7=Ohm NTC exp, 8=mA exp
PIV	18	Interpolation Table Length	Length of the user sensor table, 0-10		Write
MV	10	Modbus 1 Baud Rate	Modbus port 1 baud, default 115200		Write	1=1200, 2=2400, 3=4800, 4=9600, 5=19200, 6=38400, 7=57600, 8=115200
MV	11	Modbus 1 Parity Mode	Modbus port 1 framing, default 8e1		Write	1=8e1, 2=8o1, 3=8n2, 4=8n1
MV	12	Modbus 2 Baud Rate	Modbus port 2 baud, default 115200		Write	1=1200, 2=2400, 3=4800, 4=9600, 5=19200, 6=38400, 7=57600, 8=115200
MV	13	Modbus 2 Parity Mode	Modbus port 2 framing, default 8e1		Write	1=8e1, 2=8o1, 3=8n2, 4=8n1
PIV	20	Modbus 1 Retries Count	Modbus port 1 retries, default 2		Write
PIV	21	Modbus 1 Response Timeout	Modbus port 1 timeout, default 100	ms	Write
PIV	22	Modbus 2 Retries Count	Modbus port 2 retries, default 2		Write
PIV	23	Modbus 2 Response Timeout	Modbus port 2 timeout, default 100	ms	Write
BVmin	0	MR Device Driver Status	Combined status of all extension modules		Read	Inactive=normal, Active=fault
BV	1	MR Device Search	Write active to search for extension modules		Write	Inactive=normal, Active=search

Object ID lookup: METZ CONNECT EWIO2 Ethernet I/O with BACnet server point IDs by name

AI0Analog Input E1
AI1Analog Input E2
AI2Analog Input E3
AI10Analog Input E1 Raw
AI19ADC Noise
AI20Frequency DI1
AI21Frequency DI2
AI22Frequency DI3
AI23Frequency DI4
AI24Frequency DI5
AI25Frequency DI6
AI26Frequency DI7
AI27Frequency DI8
AI28Supply Voltage
AI29Device Temperature
AI30Counter DI1
AI31Counter DI2
AI32Counter DI3
AI33Counter DI4
AI34Counter DI5
AI35Counter DI6
AI36Counter DI7
AI37Counter DI8
BI0Binary Input DI1
PIV0Debounce Time DI1
AO0Voltage Output O1
BO0Relay K1
BO1Relay K2
BO2Relay K3
BO3Triac T1
BO4Triac T2
BO5Relay K4
BO6Relay K5
BO7Relay K6
BO10Transistor Output D1
BO11Transistor Output D2
BO12Transistor Output D3
BO13Transistor Output D4
MV0Measurement Range E1
AV9Watchdog Time
AV20X 1
AV21Y 1
AV22X 2
AV23Y 2
AV24X 3
AV25Y 3
AV26X 4
AV27Y 4
AV28X 5
AV29Y 5
AV30X 6
AV31Y 6
AV32X 7
AV33Y 7
AV34X 8
AV35Y 8
AV36X 9
AV37Y 9
AV38X 10
AV39Y 10
MV18User Defined Range
PIV18Interpolation Table Length
MV10Modbus 1 Baud Rate
MV11Modbus 1 Parity Mode
MV12Modbus 2 Baud Rate
MV13Modbus 2 Parity Mode
PIV20Modbus 1 Retries Count
PIV21Modbus 1 Response Timeout
PIV22Modbus 2 Retries Count
PIV23Modbus 2 Response Timeout
BV0MR Device Driver Status
BV1MR Device Search

Integration notes

Names are the PICS defaults. Where the PICS spells out every channel (Analog Input E1 ... E3, Frequency DI1 ... DI8, Counter DI1 ... DI8, X 1 / Y 1 ... X 10 / Y 10, and the per-instance relay / triac / transistor list) all channels are listed. Where it prints only the first default name followed by '...' (BI 0-7 'Binary Input DI1', PIV 0-7 'Debounce Time DI1', AO 0-2 'Voltage Output O1', MSV 0-2 'Measurement Range E1', AI 10-12 'Analog Input E1 Raw'), only that first object is listed; the other channels follow on the next instances (BI 0-3 are switch inputs, BI 4-7 are 24 V optocoupler inputs; AO 0-2 are terminals O1-O3). All object names can be renamed; writing an empty name restores the default.
Binary Output layout depends on the device type: the 6-relay / 2-triac type uses BO 0-7 as K1, K2, K3, T1, T2, K4, K5, K6; the 4-relay / M-Bus type uses BO 0-3 as K1-K4. Both have transistor outputs BO 10-13.
The user-defined sensor table is headed 'Analog Value 20...39' but its own table numbers the points 1-20; it is listed here as AV 20 (X 1), AV 21 (Y 1) ... AV 39 (Y 10).
Left out: extension-module objects (instances 40-157 per module address, MV 20-25 module type), trend logs 1-400, SQLite analog values 201-600, file and structured-view objects.
Access is from the PICS: outputs are commandable; settings objects are writable and stored in the configuration file.

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 EWIO2 Ethernet I/O with BACnet server 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 METZ CONNECT EWIO2 Ethernet I/O with BACnet server

How many BACnet points does the METZ CONNECT EWIO2 Ethernet I/O with BACnet server have?

This list has 72 BACnet objects: 23 analog inputs, 1 analog output, 21 analog values, 1 binary input, 12 binary outputs, 2 binary values, 6 multi-state values, 6 positive integer values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which METZ CONNECT EWIO2 Ethernet I/O with BACnet server BACnet points are writable?

47 of the 72 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.

Where is the official METZ CONNECT EWIO2 Ethernet I/O with BACnet server BACnet documentation?

METZ CONNECT does not publish it on its own website. This list comes from PICS Bacnet-Server v2.1.6 (EWIO2) (PICS_Bacnet-Server_v2.1.6), a copy hosted by BACnet International at https://www.bacnetinternational.net/catalog/manu/metz%20connect%20gmbh/PICS_Bacnet-Server_v2.1.6.pdf. Ask METZ CONNECT or its representative for the current revision.

What are the minimum BACnet points to integrate the METZ CONNECT EWIO2 Ethernet I/O with BACnet server?

Start with BO 0 Relay K1 (Relay K1 command); AO 0 Voltage Output O1 (0-10 V output O1, 0-102.4 %); AV 9 Watchdog Time (Output watchdog time, s (0 = off)); AI 0 Analog Input E1 (Universal input E1 value); BI 0 Binary Input DI1 (Digital input DI1); AI 30 Counter DI1 (Pulse counter DI1); BV 0 MR Device Driver Status (Extension module fault, active = fault).

Does the METZ CONNECT EWIO2 Ethernet I/O with BACnet server need a BACnet heartbeat or have a communication timeout?

AV 9 Watchdog Time (default 0 = off, up to 655.35 s). Any received BACnet APDU restarts it; on timeout all output priority arrays are cleared and outputs go to their relinquish defaults.

How do I check these points on the real EWIO2 Ethernet I/O with BACnet server?

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.

Source: PICS Bacnet-Server v2.1.6 (EWIO2) · PICS_Bacnet-Server_v2.1.6. Object names, instances and units are reproduced as published; descriptions are our own.