BLUE JAY GYDCG-UBCH2 Series Dual DC Channels Insulation Monitoring Device User Manual

BLUE JAY GYDCG-UBCH2 Series Dual DC Channels Insulation

Monitoring Device User Manual

tech@cqbluejay.com
www.cqbluejay.com

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When you use GYDCG-UBCH2 Series, be sure to read this user manual carefully, and be able to fully understand the implications, the correct guidance of operations in accordance with user manual, which will help you make better use of GYDCG-UBCH2 Series, and help to solve the various problems at the scene.

1. Before turning on the power supply, be sure that the power supply within the provisions of the instrument;
2. When installation, the current input terminal must non-open, voltage input terminals must Non short circuit;
3. Communication terminal (RS485) is strictly prohibited to impose on high pressure;
4. Be sure the instrument wiring consistent with the internal system settings;
5. When communicating with the PC, instrument communication parameters must be consistent with the PC.

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SUMMARIZE

GYDCG-UBCH2 Series model is based on MODBUS protocol of DC insulation monitoring device, is used in on-line monitoring insulation resistance of the DC floating system (two DC system shared one ground). two DC channels are controlled independently, two DC insulation monitoring noninterference in each other. Users can enable or disable the insulation monitoring function of each DC channel and acquire insulation resistance values by RS485 communication.

This product has the characteristics of high reliability, easy installation, and convenient use. It is one of the important equipment to ensure the safe and stable operation of automobile charging piles.

This product can monitor positive and negative symmetrical and asymmetrical insulation resistance, when the product is turned on, it can real-time monitor the insulation resistance, and user can read the current insulation resistance value at any time. After the product is turned off, the high-voltage switch is disconnected, and the product is completely separated from the DC and the earth.

FEATURES

• Two independent control
• Remote monitoring and management
• Monitor positive and negative poles
• Ground insulation resistance
• DC voltage monitoring
• Vehicle side DC voltage monitoring
• Voltage reverse polarity alarm

APPLICATIONS

• DC capacitor discharge
• Guarantee the safety and stability of charging
• Improvement of the efficiency and charging quality
• Personnel and equipment security

TECHNICAL PARAMETERS

Basic parameters

Other parameters

INSTALLATION

3.1. – Mounting

The module can be installed by guide rail or screw fixation. Guide rail using standard width 36mm.
External dimensions are shown as follows: (Unit: mm)

3.2. – Connection Terminal

COMMUNICATION INTERFACE

4.1. – Connection for RS485

In RS485 communication system, this IMD module works in slave mode. Baud rate, communication address, parity check mode, can be set by DIP switch, default stop bit 1, data bit 8. The interval between each byte in the sent frame must not exceed 20ms, otherwise the frame will be cleared.

4.1.1 – Communication Parameter configuration bit
Two Dip switch configuration bit ‘CONFIG’, one of which can be used to configure the communication verification mode. E stands for EVEN parity and O stands for ODD parity. Touse the corresponding check sum, simply dial the corresponding position to “ON”. If E and O are set to no, indicates NONE parity. See Figure 2.

4.1.2 – Initializing Module Communication Parameters

Dip switch configuration bit ‘CONFIG’，second function can be used to initialize communication parameters. When E and O of CONFIG are dialed to ON at the same time foat least 3 seconds, the baud rate is restored to 9600bps and the communication address is restored to 01H and 02H.
The system can be initialized only once after each power on. The total number of times for modifying the baud rate, changing the communication address, and initializing the baud rate must be less than 1 million. See Figure 3

4.2. – MODBUS © protocol

Standard MODBUS RTU protocol, initial address: A0H, initial baud rate: 9600bps, parity: (parity can be set through CONFIG), stop bit 1, data bit 8. The interval between each byte in the sent frame must not exceed 20ms, otherwise the frame will be cleared.

4.2.1 – Modbus RTU Frame Format:

MODBUS FUNCTIONS:

4.3.1 – Communication protocol RS485
4.3.2 – Dc DC1 input relay control instructions

Instruction 1 Input relay closed
Host inquiry:
Addr. 97 00 00 00 00 00 00 CRC CRC
Slave response:
Addr. 97 00 00 00 00 00 00 CRC CRC

Instruction 2 Input relay is disconnected
Host inquiry:
Addr. 90 00 00 00 00 00 00 CRC CRC
Slave response:
Addr. 90 00 00 00 00 00 00 CRC CRC

4.3.3 – Dc DC2 input relay control instructions

Instruction 1 Input relay closed
Host inquiry:
Addr. 9A 00 00 00 00 00 00 CRC CRC
Slave response:
Addr. 9A 00 00 00 00 00 00 CRC CRC

Instruction 2 Input relay is disconnected
Host inquiry:
Addr. 95 00 00 00 00 00 00 CRC CRC
Slave response:
Addr. 95 00 00 00 00 00 00 CRC CRC

4.3.4 – Dc DC1 data reading instruction

Host inquiry: Addr. 01 00 00 00 00 00 00 CRC CRC
Slave response: Addr.
01
00(H): Dc voltage high bytes
00(L): Dc voltage high bytes
00(H): Positive insulation resistance high bytes
00(L): Positive insulation resistance low bytes
00(H): Negative insulation resistance high bytes
00(L): Negative insulation resistance low bytes
CRC: According to actual calculation
CRC: According to actual calculation

Slave response: (reverse connection state > 160 VDC) Addr. 70 00 00 00 00 00 00 CRC CRC

Command example:
Host inquiry: A0 01 00 00 00 00 00 00 5A B3
Slave response: A0 01 01 A4 01 F4 00 78 6A 97
Slave response: A0 70 00 00 00 00 00 78 3B B4
(reverse connection state)

4.3.5 – Dc DC2 data reading instruction

Host inquiry: Addr. 03 00 00 00 00 00 00 CRC CRC
Slave response: Addr.
03
00(H): Dc voltage high bytes
00(L): Dc voltage high bytes
00(H): Positive insulation resistance high bytes
00(L): Positive insulation resistance low bytes
00(H): Negative insulation resistance high bytes
00(L): Negative insulation resistance low bytes
CRC: According to actual calculation
CRC: According to actual calculation

Slave response: (reverse connection state > 160 VDC)  Addr. 80 00 00 00 00 00 00 CRC CRC

Command example:
Host inquiry: A0 03 00 00 00 00 00 00 00 5A B3
Slave response: A0 03 01 A4 01 F4 00 78 6A 97
Slave response: A0 07 00 00 00 00 00 00 78 3B B4
(reverse connection state)

4.3.6 – Do.1 Vehicle Side Voltage Data Reading Instruction
Host inquiry: Addr. 02 00 00 00 00 00 00 CRC CRC
Slave response: Addr.
02
00(H): Auto mobile voltage 1 high 8bits
00(L): Car voltage 1 low 8bits
00
00
00
00
CRC
CRC

Slave response: (reverse connection state > 20 VDC)  Addr. 07 00 00 00 00 00 00 CRC CRC

Command example:
Host inquiry: A0 02 00 00 00 00 00 00 69 B3
Slave response: A0 02 01 A4 00 00 00 00 19 BB
(voltage 420V)
Slave response: A0 07 00 00 00 00 00 00 78 3C B3
(reverse connection state)

4.3.7 – Do.2 Vehicle Side Voltage Data Reading Instruction

Host inquiry: Addr. 05 00 00 00 00 00 00 CRC CRC
Slave response: Addr.
05
00(H): Auto mobile voltage 2 high 8bits
00(L): Car voltage 2 low 8bits
00
00
00
00
CRC
CRC

Slave response: (reverse connection state > 20 VDC)  Addr. 08 00 00 00 00 00 00 CRC CRC

Command example:
Host inquiry: A0 05 00 00 00 00 00 00 1F 73
Slave response: A0 05 01 A4 00 00 00 00 6F 7B
(voltage 420V)
Slave response: A0 08 00 00 00 00 00 00 C3 B3
(reverse connection state)

Register map

The samples:

Sample1 Start insulation monitoring
Host inquiry:
01 06 01 02 00 11 E9 FA
Slave response:
01 06 02 00 11 78 84

Sample2 Turn off insulation monitoring
Host inquiry:
01 06 01 02 00 00 29 F6
Slave response:
01 06 02 00 00 B8 88

Sample3 Read the DC bus voltage and positive and negative electrode resistance to the ground (read 4 registers)
Host inquiry:
01 03 00 10 00 04 45 CC
Slave response:
01 03 08 03 E8 02 58 EA 60 02 58 A9 7F
Definition : Read the DC voltage 0X03E8(100V), the total insulation resistance 0X0258(600KΩ), the positive insulation resistance 0xEA60 (infinite), the negative insulation resistance 0X0258 (600KΩ).

Sample4 Read IO status:
Host inquiry:
01 03 00 1B 00 01 F4 0D
Slave response:
01 03 02 00 84 B8 27
Definition : Bus voltage reverse connection, insulation monitoring is enabled (ground relay is closed), insulation resistance monitoring is invalid.

Slave response:
01 03 02 00 06 38 46
Definition : There is no reverse connection of bus voltage, insulation monitoring is enabled (ground relay is closed), and insulation resistance monitoring is effective.

Sample5 Read version number
Host inquiry:
01 03 00 1A 00 01 A5 CD
Slave response:
01 03 02 22 01 61 24
Definition : The version number is V2201.

Model Selection Sheet

SAFETY CONSIDERATIONS

All installation specification described at the previous chapters named:
INSTALLATION AND STARTUP, INSTALLATION MODES and SPECIFICATIONS.

Please note that with the instrument powered on, the terminals could be dangerous to touching and cover opening actions or elements removal may allow accessing dangerous parts. This instrument is factory-shipped at proper operation condition.

◆ The device must have a professional installation and maintenance
◆ Any operation of the device, you must cut off the input signal and power;

MAINTENANCE

The GYDCG-UBCH2 does not require any special maintenance. No adjustment, maintenance or repairing action should be done when the instrument is open and powered on, should those actions are essential, high-qualified operators must perform them.

Before any adjustment, replacement, maintenance or repairing operation is carried out, the instrument must be disconnected from any power supply source.

When any protection failure is suspected to exist, the instrument must be immediately put out of service. The instrument’s design allows a quick replacement in case of any failure.

FAQS

Question 1: The power indicator LED is off
Check whether the power supply terminal of the module is improperly connected, or the hot swap overcurrent causes the fuse to burn, try to avoid hot plug.
Question 2: Communication failure
Do not use USB-232-485 bipolar interface for communication,
If the communication fails again, use the CONFIG mode to restore the factory Settings parameters. (chapter4.1.2)
Question 3: The insulation monitoring resistance is infinite after the simulation of insulation resistance
Check whether the ground cable is connected reliably at GND port.
Question 4: The insulation monitoring resistance is much smaller than actual value
The DC ground capacitance may be too large. Check the DC ground capacitance
Question 5: Communication initialization is invalid
The system can be initialized only once by CONFIG during each power-on.

For any inquiry about the instrument performance or any failure,
contact to Blue Jay’s technical service.
Blue Jay – After-sales service
E-mail: tech@cqbluejay.com

Tel: +0086-023-67628702 Email:tech@cqbluejay.com
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China

References

• Blue Jay - Industrial Electric Automation Manufacturer - Power & Energy Meters, Automatic protection relay etc.

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