Model 10BD1 Satellite Slave Card
For a standard “B sized” mainframe to integrated into a System 10 network that is is equipped with a Model 10BD4, the remote “B” mainframes must contain a Model 10BD1 Satellite Slave Card. This card can be placed into any unused “B” slot within the mainframe and communicates in a transparent mode with the host and other satellite units within the network to maintain the 2500 channel per second system update rate.
Host-satellite (Model 10BD4) System and Satellite (Model 10BD1) Systems interchanges are achieved via RS485 interface of fixed protocol (153.6K baud, 8 data bits, 2 stop bits, odd parity). The 10BD4 normally allows up to 31 satellites on a twisted-pair ring of up to 1 km (3279 ft.) in total length.