Serial switch boxes B&B Electronics

RS-232, 115.2Kbps, 122 x 71 x 23mm, Blue Description

The RS-232 Four Port Mini Smart Switch/Port Combiner, Model 232MSS2, allows one RS-232 host device to connect to as many as four RS-232 devices. The 232MSS2 can function as a software and/or hardware controlled switch. As a software controlled switch, referred to as smart switch mode, the device connected to the master port of the 232MSS2 has control over which one of the four ports it is connected to. As a hardware controlled switch, referred to as port combiner mode, the handshake lines of the devices connected to the four ports are used to gain access to the master port. More details of smart switch and port combiner modes are covered later in this datasheet. There are four LED's on the 232MSS2 to indicate which port is connected to the master port. The master port has a DB-25S female connector and the slave ports have DB-9S female connectors. The master port can be configured as a DTE or DCE port by an internal switch setting (See Table 1). If the master port is configured as a DTE port, the four slave ports will become DCE ports. The 232MSS2 supports the following signals: TD, RD, RTS, and CTS. Handshake lines DSR and DTR are connected together and are not passed through to the master port. There is no delay through the device and data is not buffered. The 232MSS2 will work with baud rates from 1200 to 115,200 bps; 7 or 8 data bits; even, odd or no parity; and 1 or 2 stop bits (7,N, 1 is not allowed). The communication format is set via dipswitch 1 (SW1 -- See Table 1).