3ADT309611R6102 | ABB SDCS-CON-2 REV:J Control Board

The ABB SDCS-CON-2 control board is an advanced component for industrial drive systems, designed to enhance the functionality, reliability, and communication capabilities of DCS500 and DCS600 series converters. This board is built around the 80186EM microprocessor and an ASIC circuit (DC94L01) to deliver precise control and robust performance.

Fig. 3.1/1 Layout of the control board SDCS-CON-2

Key Features

1. Microprocessor and ASIC-Based Control

The 80186EM microprocessor ensures high-speed operation and efficient processing.
The DC94L01 ASIC circuit provides application-specific functionalities such as:
- Communication via RS-485 (control panel and field exciters).
- Measurement, watchdog functionality, A/D and D/A conversion control.
- Thyristor firing pulse generation.

2. Integrated Memory and Backup System

Flash PROM (D33 & D35) stores system programs and parameter values.
Static RAM circuits backed by a 1 F capacitor store operational data like fault logs and alarms, with a backup duration of several days.
Full charge of the backup capacitor takes approximately 30 minutes.

3. Watchdog Functionality

Monitors the operation of the control board program.
Automatically disables writing to FPROM and resets critical outputs during faults.

4. Communication and Integration

DDCS (Digital Drive Control System) channel supports data transfer rates up to 4 Mbits/s.
Terminals X16:4 and X16:5 provide +24 V / ≤150 mA power supply for fieldbus modules.

Specifications

Power and Connections

Power Supply for Fieldbus Modules: +24 V, ≤150 mA.
Terminal blocks (X3 to X7 and X16) are removable and must be connected in sequence.

Input/Output Scaling and Modes

Analog Inputs:
- ±90 to ±270 V hardware range, 12-bit resolution.
- Other ranges: ±30 V, ±8 V, or fixed ±3 V for nominal converter current.
Digital Outputs:
- 7 outputs, 160 mA total limit, short-circuit proof.
Encoder Supply:
- Selectable 5V, 12V, or 24V supply.

Special Notes

Ensure impedance matching (120 Ω) and use sense lines for accurate voltage corrections.
Signal definition:
- 0–8 V = “0” status, 16–60 V = “1” status.
Analog smoothing time ≤2 ms for high accuracy.

Applications

DCS500 Converters: Used for thyristor control and advanced drive operations.
DCS600 Converters: Enables high-speed communication and integrated fieldbus module functionality.

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