9
PSCA Modbus Master (Serial
Communication) Module
9.1
PSCA Serial Communication I/O Pack
The Serial Communication (IS420PSCAH1B) I/O pack provides the electrical interface
between one or two I/O Ethernet networks and a serial communications terminal board.
The I/O pack contains a BPPC processor board common to all Mark VIe distributed I/O
packs and a serial communications board. The communications board contains six serial
transceiver channels, each of which can be individually configured to comply with
RS-232, RS-422, or RS-485 half-duplex standards.
Input to the I/O pack is through dual RJ-45 Ethernet connectors and a 3-pin power input.
Output is through a DC-62 pin connector that connects directly with the associated
terminal board connector. One of the Ethernet ports can be used to support Ethernet
Modbus communication on Simplex networks. Visual diagnostics are provided through
indicator LEDs.
The IS420PSCAH1B I/O pack contains a functionally compatible BPPC that is
supported in ControlST V04.07 and later.
PSCAH1A
Communications
Module
Processor board
BSCAH1A
communications
board
Single or dual
Ethernet cables
ENET1
ENET2
External 28 V dc
power supply
Six serial
communication
channels
SSCAH1A
Communications
Terminal Board
PSCAH1
communications
module
BSCAH#A
communications board
PSCA Modbus Master (Serial Communication) Module
GEH-6855_Vol_II System Guide 285
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