The 193X704ABG02 is a Sensitive Relay Board manufactured by GE for their Speed Variator Drive system as well as for their SCR Drive system. While these systems both fall under the “Speed Variator Products” department at GE, there are some significant differences in the drives. The Speed Variator drive is bidirectional while the SDR drive is unidirectional. As a constant torque range system, the Speed Variator drive changes horsepower linearly with speed as the load torque remains constant. The SDR drive offers adjustable acceleration. The SDR drive also includes an operator station.
The 193X704ABG02 has a tall front blue and silver panel with a rounded handle attached to its bottom edge. The panel attaches to the PCB via two screws inserted into a flange then through the PCB and then supported by a metal bar attached along the top edge of the board. The front panel is marked with the GE logo and the board information. There are four rotating switches (Gain/P628/P627/Bias) that connect through cut-outs to rotary potentiometers on the other side of the panel.
The 193X704ABG02 has both carbon composite and metal film resistors. Some of these are numbered. These components can be mounted to the board either horizontally or vertically. A single capacitor is placed near the back edge of the board. The board also has two relays located near the back edge. These are marked 22JNCC-22752 and 104X168AA050. Both relays include relay diagrams. The PCB is bisected by a sub-board that has been mounted to pins and is placed vertically on the board. This board is marked 193X701CA and is a universal amplifier board. The board is populated with resistors, capacitors, transistors, and other components.
Please review any retained manuals, data sheets or other manufacturer publications for safety procedures before beginning the installation of your new part. Only qualified technicians should maintain this equipment.