Danfoss WND-WR-MB Opt 38K WattNode Modbus Installation Guide
- October 30, 2023
- Danfoss
Table of Contents
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
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. |
Line voltage too high.
DISCONNECT power immediately!
All| OFF| Watt Node not operating.
Check that the wiring and voltages are correct
All| Red for 3 seconds or more| Watt Node Error.
If you see this happen repeatedly, replace the meter
Single| Green| No power but line voltage is present on this phase
Single| OFF| No voltage on this phase
Single| Red continuous flashing| Negative power on this phase (Re-versed CT’s,
swapped CT wires or CT not matching line voltage phase)
Single| Flashing Green| Positive power on this phase
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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