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BlueStorm Installation Guide, Connect Tech Inc.
8 Revision 0.10
Multi-drop Slave Mode
In this mode the TxD+/- line driver is enabled only when data is transmitted and RxD+/- is
enabled at all times. This mode is typically used in multi-drop 4-wire connections. This mode
requires software setup in Control Panel – System Properties – Hardware - Device Manager – Ports – CTI
PCI UART. Click on Advanced under Port Settings.
Line Bias/Termination
The RS-422/485 transceivers, both transmit and receive are optionally biased to produce a line
level mark condition through jumper selectable resistors. These options are typically used in
multi-drop 4-wire connections. Termination may also be required depending on your wiring
configuration. Each case must be evaluated to determine which options to enable.
Jumper Block Diagrams for BlueStorm