Danfoss WND-WR-MB Opt 38K WattNode Modbus Installation Guide

: October 30, 2023
: Danfoss

Table of Contents

WND-WR-MB opt 38K Watt Node Modbus
Precautions
Documents / Resources
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

ENGINEERING
TOMORROW
Installation Guide
Watt Node Modbus
Type WND-WR-MB opt 38K, EP

WND-WR-MB opt 38K Watt Node Modbus

–40 – +80 °C (–40 – 176 °F)
Operating Humidity: non-condensing, 5 – 90% relative humidity (RH) up to 40 °C, decreasing linearly to 50% RH at 55 °C.

L × W × H:
155 mm × 85 mm × 38 mm (6.1” × 3.35” × 1.5”)

Mounting holes:
center-to center 136.6 mm (5.375 in)

CT:
0,333 V AC at rated current

Danfoss WND WR MB Opt 38K WattNode Modbus - overview 1

Code| Electrical Service Type (Load type)| Line-to-Neutral (V AC)| Line-to-Line (V AC)| Meter Powered by
---|---|---|---|---
080Z2129| Single Phase 2-wire with neutral| 96 – 347| 120 – 600| Line to Neutral or Line to Line
Single Phase 3-wire with neutral| 96 – 347| 120 – 600| Line to Neutral or Line to Line
Three Phase 4-wire wye (star) with neutral| 96 – 347| 120 – 600| Line to Neutral or Line to Line
Single Phase 2-wire with neutral| Single Phase 3-wire with neutral| Three Phase 4-wire Wye (star) with neutral
---|---|---
| |

Modbus address

DIP Switch	1	2	3	4	5	6
Up (1) Value	1	2	4	8	16	32
Address	Examples
1	Up	Down	Down	Down	Down	Down
1+2+4 = 7	Up	Up	Up	Down	Down	Down
4+16 = 20	Down	Down	Up	Down	Up	Down
1+2+16+32 = 51	Up	Up	Down	Down	Up	Up

Modbus integration with the AK-SM 800A
Step 1: Set the Modbus address
Step 2: Perform a network scan from the AK-SM 800A
For more information about data communication see document RC8AC and the AK-SM 800A manual. Pay special attention to the AK-SM 800A manual if devices with a different baud rate than 38.400 baud are connected to the AK-SM 800A, e.g. the variable speed compressor type SLV.

Phase Status LED

All/ Single phase	LED Indication	Description
All	Red, Yellow,
Green for 3 x 1 second	Power up sequence
All	Red / Green continuous flashing	Overvoltage warning.

Modbus Com LED

LED Indication	Description
Green flash	Valid packet for this device
Yellow flash	Valid packets for different device
Red for 1 second	Invalid packet (bad baud rate, noise, …)
Red / Yellow continuous flashing	Possible address conflict (two devices with

same address)
Red| Address set to 0 (zero)

Precautions

Only qualified personnel or licensed electricians should install the Watt Node meter. The mains voltages can be lethal!
Follow all applicable local and national electrical and safety codes.
The terminal block screws are not insulated. Do not contact metal tools to the screw terminals if the circuit is live!
Verify that circuit voltages and currents are within the proper range for the meter model.
Use only UL listed or UL recognized current transformers (CTs) with built-in burden resistors, that generate 0.333 Vac (333 millivolts AC) at rated current. Do not use current output (ratio) CTs such as 1 amp or 5 amp output CTs: they will destroy the meter and may create a shock hazard.
Protect the line voltage phase conductors, typically #14 or #12 AWG with 3 pole 15 A or 20 A breaker. Depending on location, breaker may provide disconnect means.
Equipment must be disconnected from the HAZARDOUS LIVE voltages before access.
If the meter is not installed correctly, the safety protections may be impaired.

AN430921567693en-000101
© Danfoss | Climate Solutions | 2022.10

Documents / Resources

| Danfoss WND-WR-MB Opt 38K WattNode Modbus [pdf] Installation Guide
WND-WR-MB Opt 38K, EP, WND-WR-MB Opt 38K, WattNode Modbus, WND-WR-MB Opt 38K WattNode Modbus, Modbus
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