IS220PSCAH1A

About the IS220PSCAH1A

The IS220PSCAH1A is a Serial Communication I/O pack. The pack was manufactured for the Mark VIe control system by GE Energy. The IS220PSCAH1A is designed to provide interfacing between up to two input-output Ethernet networks and a serial communications board.

This board has six individually configurable serial transceiver channels which can be used with RS485, RS232, and RS422 half-duplex standards. The input needed to provide power to the PSCA pack is sent through a three-pin power input and dual RJ45 Ethernet connectors. 

Hardware Tips and Specifications

There is a Serial Modbus Master Service on the IS220PSCAH1A pack that has a number of different features, some of which are as follows: 

• RTU
• Data Bits: seven, eight
• 32-bit data Word ordering
• Parity: even, none, odd
• Station addresses

These features are used for the six configurable ports on the PSCA pack. The configurations can be done at the port level. With the PSCA, the two Ethernet ports on the pack can be used to help support Ethernet Modbus Master Protocols; please note that this configuration can only occur when being used on a simplex network. 

The IS220PSCAH1A pack has the ability to perform self-diagnostic tests, one of which is monitoring the analog inputs which monitor position and pressure to check the configurable high and low levels. The limits are used for enabling and disabling functions, latching/non-latching, and as well as generate alarms.