BlueStorm Installation Guide, Connect Tech Inc.
Multi-drop Slave Mode
In this mode the TxD+/- line driver is enabled only when data is transmitted and RxD+/- is enabled all the time. 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.
Jumper Block Diagrams for BlueStorm
Figure 1: BlueStorm/LP jumper block locations, 2 port models
