DDSU666-H Smart Power Sensor Quick Guide
Issue: 01
Date: 2018-05-18
1 Overview
Model Naming Conventions
DDSU666-H
Dimensions:
- Height: 100mm
- Width: 36mm
- Depth: 52mm
- Mounting ear height: 35mm
- Device width: 45mm
Port Definition:
- Voltage Input: 230 V
- CT Current Input: 40 mA
- Current Transformer (CT): 100 A/40 mA
Terminal Connections:
- AC Power Cable: L-3, N-4
- CT Cable: I*-5, I-6
- Comm. Cable: RS485A-24, RS485B-25
Diagrams:
The device is a rectangular unit with terminals on the top and bottom. The front panel displays the model name, CE marking, and input/output specifications. It features a mounting ear on the side.
The terminal block shows connections for AC power (L, N), CT current (I*, I), and RS485 communication (RS485A, 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, N-4 | Two-core (L and N) outdoor copper cable | 4-6 mm² | 10-21 mm | Prepared by the customer |
| CT cable | I*-5, I-6 | N/A | N/A | N/A | Manufacturer |
| Comm. cable | RS485A-24, RS485B-25 | Two-core outdoor shielded twisted pair | 0.25-1 mm² | 4-11 mm | Manufacturer |
Connecting Diagram
- Connect the L,N voltage lines to the 3, 4 terminals of the collector.
- Connect current transformer outlets I*, I to terminals 5, 6 of the collector.
- Connect RS485A and RS485B to the communication host.
Diagram Description:
The diagram shows the LOAD connected to the CT. The CT is then connected to terminals 5 and 6 of the DDSU666-H. The voltage lines (L, N) are connected to terminals 3 and 4. RS485A and RS485B are connected to the communication host.
4 User Interface
Display (Auto loop)
Auto loop Switch time = 5s.
| No. | Display interface | Description | No. | Display interface | Description |
|---|---|---|---|---|---|
| 1 | Imp. kWh 0001.20 | Imp. active energy=1.2kWh | 2 | Exp. kWh 0001.00 | Exp. active energy=1.0kWh |
| 3 | kW P 1.100 | active power=1.1kW | 4 | V U 220.0 | Voltage =220.0V |
| 5 | A I 5.000 | 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 | kWh 0000.20 | Comb. active energy=0.20kWh | 2 | Imp. kWh 0001.20 | Imp. active energy=1.2kWh |
| 3 | Exp. kWh 000 1.00 | Exp. active energy=1.00kWh | 4 | 71.9600 | None parity, 1 stop bit, baud=9600bps |
| 5 | NO. 011 | Comm.Add = 11 | 6 | V U 220.0 | Voltage=220.0V |
| 7 | A I 5.000 | Current =5.000A | 8 | kW P 1.100 | active power=1.1kW |
| 9 | FE 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 -> Press once -> Alternate appearance (011) -> Press once -> Alternate appearance (012) -> exit after 20s
Baud Interface:
Alternate appearance (71.9600) -> Alternate appearance (71.4800)
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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