SPECIFICATIONS
Part No.: IS200SSCAH1A
Manufacturer: General Electric
Country of Manufacture: United States(USA)
Product Type: Terminal Board
Series: Mark VI
IS200SSCAH1A is a Serial Communication I/O Terminal Board developed by GE. The Simplex Serial Communication Input/Output (SSCA) terminal board is a small serial communication board with up to six communication channels. Each channel can be set to send RS-232C, RS-485, or RS-422 signals. The PSCA I/O pack is compatible with the SSCA. The I/O pack connects to the controller via Ethernet and plugs into the DC-37 pin connector.
IS200SSCAH1A Installation
A sheet metal carrier and a plastic insulator mount are used to mount the board on a DIN rail. This assembly is also designed to bolt directly into a cabinet. Euro-Block terminal blocks are available in two varieties:
- SSCAH1 has a permanently mounted terminal block with 48 terminals; SSCAH2 has a right-angle header with 48 terminals that accepts a variety of commercially available pluggable terminal blocks.
- SSCA typically employs #18 AWG (shielded twisted pair) wiring. The external mounting bracket for the I/O cable shield is supplied by the customer or by GE. E1 and E2 serve as mounting holes for the chassis ground connection. A suitable shield ground must be connected to one of the SCOM terminals (37-48).
Operation
- Each of the six serial communication channels has six connection points on the SSCA terminal board. Four signal lines A-D, a signal return, and a shield common are among the points (SCOM).
- The RET terminal is used for RS-232C return. All six serial communication channels' signals are arranged in the same order. When looking through the box terminals, the signal order is SCOM, A, B, C, D, Ret, from left to right.
- A serial channel's six signal groups are assigned to terminals next to each other. From left to right, the channels are five, four, and one when looking at the bottom set of terminals. Channels six, three, and two are located on the top set of terminals, viewed from left to right. The board SCOM connections are grouped on the terminals' right side.
- When using RS-422 or RS-485, a termination resistor must be provided at either end of a transmission line. For each pair of signal lines, SSCA provides selectable termination resistors.
- JP1A and JP1B toggle the termination resistors between signals A-B and C-D. For each serial communication channel, the same function is performed. The jumper is set to disconnect the termination resistor by default. The relationship between the termination jumpers and the serial communication channel signals is clearly marked on the SSCA.
IS200SSCAH1A Characteristics
- Number of channels: Six channels
- Termination resistors: Jumper selectable between open and resistor of 121 ohm, 0.5 W, 1%.
- RS-232C return path ground:
- Selectable between the resistive ground of 100 ohm, 0.5 W
- 1M ohm, ½ W, 1% in parallel with 0.01 micro farad, 500 V, 10% capacitor.
- Maximum drops in RS-422 or RS-485 systems: Eight drops maximum
- Size: 15.9 cm high x 10.2 cm wide
- Technology: Surface-mount
- Operating Temperature : -30 to 65 degrees Celcius
Diagnostics
The following diagnostic tests are performed on terminal board components:
- The PSCA I/O pack interrogates the JA connector on the terminal board, which has its own ID device.
- The ID device is a read-only chip that contains the serial number of the terminal board, board type, revision number, and J connector location.
- When the I/O processor reads this chip and finds a mismatch, a hardware incompatibility fault is generated.
Configuration
Jumpers are used to configure the terminal board. Refer to the operation section for the location of these jumpers. The available jumpers are as follows:
- For the six serial communication channels, jumpers JP1A through JP6A apply or remove termination resistors between signal lines A and B.
- For the six serial communication channels, jumpers JP1B through JP6B apply or remove termination resistors between signal lines C and D.
- Jumpers JP1R through JP6R determine whether the return is resistive or capacitive to SCOM.
The ToolboxST application is used for all other PSCA configuration. The PSCA selects the serial communications method, either RS-232, RS-422, or RS-485, electronically.
World of Controls has the most comprehensive inventory of GE Speedtronic Mark VI control spare parts. Our team of experts is always available to help you with your Mark VI requirements. Please contact WOC if you require any additional information.
Frequently Asked Questions
What is IS200SSCAH1A?
IS200SSCAH1A is a Serial Communication I/O Terminal Board developed by GE.
Where are the jumpers integrated into the board?
Three lines of jumper switches are populated in the center.
How to obtain IS200SSCAH1A?
Contact WOC. WOC sells Mark VI boards and other turbine control components worldwide.
