 | Datasheet & Manual (COM32 & COM128 / RS-232 to RS-485) Converter Downloads Click on the Pre-sales info section to your right
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The SIEMENS COM32 and COM128 are used to interface a single RS-232 communication port to one or four RS-485 communication buses. A maximum of 32 devices may be supported on each RS-485 port. The COM32 is equipped with a single RS-485 port while the COM128 comes with four RS-485 ports, offering connectivity to a total of 128 devices. The COM128 is ideal for installations that contain more than 32 remote devices. The RS-485 protocol can support devices positioned at distances up to 4,000 feet away from the COM32 or COM128.
Features:
One RS-485 port (COM32) or four RS-485 ports(COM128) network
Switch selectable to act in DTE or DCE mode, no null-modems required
Automatic baud rate detection, no jumper or switch settings required (1200 - 19200 Baud)
750V electrical isolation between RS-485 and RS-232 sections
RS-485 port transient suppression
Microprocessor control with upgradeable firmware(COM128 only)
Line driver capability to power devices such as short-haul modem/line drivers
LED status light indicatorsACCESS COMPATIBLE