DDSU666-H Smart Power Sensor Quick Guide
Issue: 01
Date: 2018-05-18
1 Overview
Model Naming Conventions
DDSU666-H
The DDSU666-H is a smart power sensor. It has a compact design with dimensions of 100mm height, 36mm width, and 52mm depth. It features a mounting ear for installation and has a CT (Current Transformer) input with a 35mm depth.
Port Definition
Voltage Input: 230 V
CT Current Input: 40 mA
Current Transformer (CT): 100 A/40 mA
The device has terminals for AC power input (L and N) and CT input (I*, I). It also includes RS485 communication ports (RS485A and RS485B).
2 Installing the DDSU666-H
- Install the instrument on the standard DIN rail of DIN35mm.
- Install the instrument to the standard DIN rail from the top to the bottom, and then push the instrument to the DIN rail from the bottom to the front part.
3 Installing the DDSU666-H Cable
Prepare cables
| Cable | DDSU666-H | Type | Conductor Cross-sectional Area Range | Outer Diameter | Source |
|---|---|---|---|---|---|
| AC power cable | L-3 | Two-core (L and N) outdoor copper cable | 4-6 mm² | 10-21 mm | Prepared by the customer |
| N-4 | |||||
| CT cable | I*-5 | N/A | N/A | N/A | Manufacturer |
| I-6 | N/A | N/A | N/A | Manufacturer | |
| Comm. cable | RS485A-24 | Two-core outdoor shielded twisted pair | 0.25-1 mm² | 4-11 mm | Manufacturer |
| RS485B-25 |
Connecting Diagram
1. Connect the L, N voltage lines to the 3, 4 terminals of the collector.
2. Connect current transformer outlets I*, I to terminals 5, 6 of the collector.
3. Connect RS485A and RS485B to the communication host.
The diagram shows the connection of the DDSU666-H to the load and CT. The voltage lines (L, N) connect to terminals 3 and 4. The CT current transformer connects to terminals 5 and 6. The RS485 communication lines (RS485A, RS485B) connect to the communication host.
4 User Interface
Display (Auto loop)
Auto loop Switch time = 5s.
| No. | Display interface | Description | No. | Display interface | Description |
|---|---|---|---|---|---|
| 1 | 0001.20 kWh | Imp. active energy=1.2kWh | 2 | 000 1.00 kWh | Exp. active energy=1.0kWh |
| 3 | P 1.100 kW | active power=1.1kW | 4 | U 220.0 V | Voltage =220.0V |
| 5 | I 5.000 A | Current =5.000A | 6 | F 50.00 Hz | Freq.=50.00 Hz |
Display (Change By Key ◀ ▶)
| No. | Display interface | Description | No. | Display interface | Description |
|---|---|---|---|---|---|
| 1 | 0000.20 kWh | Comb. active energy=0.20kWh | 2 | 0001.20 kWh | Imp. active energy=1.2kWh |
| 3 | 000 1.00 kWh | Exp. active energy=1.00kWh | 4 | 71.9600 ps | None parity, 1 stop bit, baud=9600bps |
| 5 | Comm.Add = 11 | 6 | U 220.0 V | Voltage=220.0V | |
| 7 | I 5.000 A | Current =5.000A | 8 | P 1.100 kW | active power=1.1kW |
| 9 | PF 1.000 | Power Factor =1.000 | 10 | F 50.00 Hz | Freq.=50.00 Hz |
Comb. active energy = Imp. active energy - Exp. active energy
Setup
The Power Sensor can set up the communication address and the baud rate through the key. Long press the button 3s. The Power Sensor automatically enters into the setting interface of communication address, while the setting & display interface of baud rate and communication address circularly displays. Please press the button once for required settings for baud rate or communication address, and it will exit the communication address and baud rate without button operation for twenty seconds.
Comm.Add Interface:
Power on -> Long press 3s -> Display shows '011' (Alternate appearance) -> Press once -> Display shows '012' (Alternate appearance)
Baud Interface:
Display shows '71.9600' -> Press once -> Display shows '71.4800' (exit after 20s)
5 Troubleshooting
| Fault phenomenon | Factor analysis | Elimination method |
|---|---|---|
| No display after the instrument being powered on | 1. Incorrect wiring mode; 2. Abnormal voltage supplied for the instrument; |
1. If the wiring mode is incorrect, please connect based on the correct wiring mode (see the wiring diagram). 2. If the supplied voltage is abnormal, please supply the voltage on the instrument specification. |
| Abnormal RS485 communication | 1. The RS485 communication cable is disconnected, short circuit or reversely connected. 2. The address, baud rate, data bit and parity bit of the instrument is not in accordance with the host computer; |
1. If any problems for the communication cable, please change the cable. 2. Set the address, baud rate, data bit and parity bit of the instrument to be the same as the host computer through buttons and so as the "parameter setting". |
| Power metering inaccuracy | 1. Wrong wiring, please check whether the corresponding phase sequence of voltage and current is correct. 2. Check whether the high & low end of current transformer inlet is reversely connected. Please observe the power, to be abnormal if any negative values. |
For wrong wiring, please connect based on the correct wiring mode (see Connecting Diagram). |
6 Verifying the Installation
- Check that all mounting brackets are securely installed and all screws are tightened.
- Check that all cables are reliably connected with correct polarity and no short circuit.
7 Powering On the System
For details, see the other description.
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