Description
Technical Parameters
Product Introduction
SDCS-CON-2 3ADT309600R1 is a core control and communication module of the UNITROL® series excitation system under ABB. There are also models such as SDCS-CON-2A and SDCS-CON-2B. As the communication core of the excitation system, it can convert between the internal bus protocol (such as CAN bus) and external industrial protocols. It mainly supports the Modbus RTU protocol over the RS-485 interface and the Modbus TCP/IP protocol over the Ethernet interface, facilitating connections with external control systems, such as DCS and PLCs, in power plants.
Technical Specifications
|
Manufacture |
ABB |
|
Model |
SDCS-CON-2 |
| Part Number | 3ADT309600R1 |
|
Description |
Control Board |
|
Origin |
Finland |
|
Dimension |
25*25*5cm |
|
Weight |
0.81kg |
Product Details
3ADT309600R1 SDCS-CON-2 control board is based on the 80186EM microprocessor and the ASIC circuit DC94L01.
Memory circuits and the backup
The program, including system and parameter values, is stored in Flash PROM D33. Different programs can be downloaded directly to these PROMs. Application functionality and parameter values are saved in the Flash PROM D35. Fault and Alarm messages -the time of their appearance and some other values like the operating hours and so on- are stored in static RAM circuits. They have a backup capacitor of 1 F, which lasts a minimum of 8 hours, typically several days. It takes about 30 minutes to charge the backup capacitor.
ASIC function
ASIC = Application Specific Integrated Circuit. Most of the measurements and control functions for the DCS500 are done in the ASIC:
- communication with control panel (RS 485)
- communication with field exciters (RS 485)
- measurement
- watchdog function
- A/D and D/A-conversion control
- thyristor firing pulse generation
Watchdog function
The control board has an internal watchdog. The watchdog controls the running of the control board program. If the watchdog trips, it has the following
effects:
- Writing to FPROM is disabled.
- Thyristor firing control is reset and disabled.
- Digital outputs are forced low.
- Programmable analogue outputs are reset to zero, 0V.
Seven-segment display
A seven-segment display is located on the control board, and it shows the state of the drive.
The control board SDCS-CON-2 has an integrated DDCS (Digital Drive Control System) channel with a transfer rate up to 4 Mbits/s. This channel (V260) can be used for fieldbus modules with the DCS 500B converters or for the 12_PULE LINK with DCS 600 converters. The terminals X16:4 and 5 are provided for the power supply of the modules (+24 V / ≤150 mA).