GE DS200STCAG1A DS200STCAG1ABA Comm Board

Key Technical Specifications

This GE DS200STCAG1A DS200STCAG1ABA board operates from a 24V DC power supply. It provides two serial communication ports for turbine control networks. The unit measures 21 cm in length, 15 cm in width, and 4 cm in height. Its total weight reaches 0.6 kg without any packaging materials.

The GE DS200STCAG1A DS200STCAG1ABA includes one RS-232 port and one RS-485 port. Additionally, it features one 20-pin ribbon connector for host interface. A single 4-pin terminal block connects the DC power input. The board contains 1 processor, 2 UARTs, 4 optocouplers, 4 status LEDs, 12 resistors, and 10 capacitors.

Parameter	Value
Power Supply	24V DC ±10%, 150mA
RS-232 Port	1 (DB9, up to 115.2 kbps)
RS-485 Port	1 (terminal block, up to 115.2 kbps)
Number of Nodes	Up to 32 on RS-485
Dimensions (L x W x H)	21 cm x 15 cm x 4 cm
Weight	0.6 kg
RS-485 Termination	Jumper selectable (120 ohm)
Protocol Support	Modbus RTU, DNP3
Host Interface	20-pin ribbon header
Power Connector	4-pin terminal block
Status LEDs	4 units (Power, TX, RX, Fault)
Processor	1 unit (32-bit, 50 MHz)
UARTs	2 units
Optocouplers	4 units (RS-485 isolation)
Resistors	12 units
Capacitors	10 units
Energy Storage	47 µF at 35V

GE DS200STCAG1A DS200STCAG1ABA stores energy using one electrolytic capacitor. This capacitor provides 47 µF at 35V rating for transient filtering. Consequently, the board maintains communication during 15 millisecond power interruptions. Therefore, data packets remain intact through brief voltage sags.

Design and Integration

Both the GE DS200STCAG1A and DS200STCAG1ABA versions share identical serial communication circuitry. These boards use four-layer PCB construction with isolated RS-485 lines for noise immunity. Consequently, the GE DS200STCAG1A DS200STCAG1ABA operates reliably from -10°C to +55°C ambient temperature.

For installation, you need M3 screws for the four mounting holes. The board draws 120 mA typical current from the 24V DC supply. The RS-485 port supports cable runs up to 1200 meters. We recommend using shielded twisted-pair cables for all serial connections.

Practical Application

This turbine communication board connects turbine controls to plant DCS systems and HMIs. It translates data between multiple serial protocols for seamless integration. The GE DS200STCAG1A DS200STCAG1ABA also performs error checking and diagnostics. Therefore, it enables reliable data exchange in GE turbine control systems.