RS-232 Datasheet | Unknown Manufacturer

features power versatility, making it perfect for field testing solutions. It converts unbalanced RS-232 signals to balanced RS-422 or RS485 signals. RS-485 is an enhanced version of the RS-422 standard, allowing multiple drivers and receivers on a two-wire system. Power The 485BAT3 can be powered in three ways: batteries, port powered, or power supply. Use the battery power option when you have a low power RS-232 port (found on many laptops today) or no handshake lines or when it is inconvenient to use a power supply. Install 2 AAA batteries (not included) and put the Battery On/Off switch in the ON position. The 485BAT3 will draw as much power as possible from the RS-232 port and get any additional current necessary from the batteries. If you have a full power port and all your handshake lines, turn off your battery switch. This allows you to run fully port powered and saves your batteries for emergencies. NOTE: The Battery On-Off switch on the 485BAT3 is used for conserving battery life. It does not turn on and off all power to the unit. For your convenience there is the option to use a stripped and tinned +12VDC power supply. Simply attach it to the terminal blocks and plug it in. .. Switches In addition to the Battery On/Off switch described in the Power section above there is a 2-position dipswitch on the top of the 485BAT3. The position of these switches determines whether the signals on the terminal blocks are RS-422 or RS-485. With both switches in the “Off” position the unit will act as a full duplex RS-232 to RS-422 converter. With both switches in the “On” position, the unit acts as a half-duplex R-232 to RS-485 converter capable of multidropping on the RS-485 side. When the RS-422/RS-485 switch is in the “RS-485” position, the 485BAT3 uses a bit-wise enable method to control the RS-485 driver. This means that the RS-485 driver is enabled with each high bit transmitted. This method requires no handshake control to activate and deactivate the driver....