IS220PSCAH1B is a Serial Communications I/O Pack designed by General Electric as a part of the Mark VIe series. The Serial Communication Input/Output (PSCA) pack interfaces one or two I/O Ethernet networks with a serial communications terminal board. The pack includes a processor board that is shared by all Mark* VIe distributed I/O packs as well as a serial communications board. The communications board has six serial transceiver channels, each of which can be configured to meet RS-232, RS-422, or RS-485 half duplex standards. The pack is powered by three-pin power input and two RJ45 Ethernet connectors. Output is via a DC-62 pin connector that is directly connected to the associated terminal board connector. On Simplex Networks, one of the Ethernet ports can be used to support Ethernet Modbus communication. Visual diagnostics are provided through indicator LEDs.
IS220PSCAH1B Installation
To install the PSCA pack
Processor
All Mark VIe Ethernet I/O packs or modules share the same processor board. It includes the following:
The processor board is linked to an acquisition board dedicated to the function of the I/O pack or module. When input power is applied, the soft-start circuit increases the voltage available on the processor board. The local power supplies are turned on in sequence, and the processor reset is disabled. After finishing self-test routines, the processor loads application code specific to the I/O pack or module type from flash memory. The application code reads board ID information to ensure that the application code, acquisition board, and terminal board are all correctly matched. With a good match, the processor attempts to establish Ethernet communications, beginning with a network address request. The address request employs the industry-standard dynamic host configuration protocol (DHCP) and the terminal board's unique identification. Following Ethernet initialization, the processor programs the on-board logic, executes the application, and allows the acquisition board to start up.
Auto-Reconfiguration
Data Flow from IS220PSCAH1B to Controller
Power Management
Connectors
IS220PSCAH1B Features