Product details：

Manufacturer : ICS Triplex
Product No. :T9300
Product type :I/O Base Unit
Voltage Range : 20 to 32V dc
Heat Dissipation : 40W
Use with Chassis : T8300
Maximum Load : 40W
Module Clocks : 50MHz
Expander Bus Data Rate : 250Mbps

The T9300 is a I/O Base Unit. Place the I/O module on to the dowel pins on the T9300 I/O base unit. Make sure the slot on the head of the module clamp screw is vertical and then push the module home until the module connectors are fully mated with the I/O base unit and termination assembly connectors.
Insert the free end of the expansion cable into a right hand socket of a T9300 I/O base unit.Connect the free end of the expansion cable to the left hand plug of an I/ O base unit using a cable socket assembly.Insert a cable socket assembly into the left hand connector of the T9300 processor base unit.

T8191

Peer network control board Configures and controls the network for data transmission between peer I/O boards. The board must be defined before the I/O board.
There are eight different peer I/O boards (input and output, digital and analog, 16 and 128 channels). Each input board has an output board with the same type and number of channels. In order for the I/O boards to communicate with each other, they must share the same network, peer, and data identity. The combination of these three identities should be considered a global data identifier that must be uniquely defined for each I/O board pair throughout the peer network.
Think of it as routing multi-core cables between systems. Each multi-core cable is placed in a tray (network). Different multi-core cables (subnets) can be routed in a single tray. Each controller on the network has a unique identifier (peer ID). The wires at each end must be matched to similar devices (analog/digital) with the same number of channels (16 or 128).