The LDM30 RS-232 serial line driver is designed to allow video display terminals (VDTs) and other RS-232 devices to be connected over distances sufficient to cover any industrial or institutional complex of buildings.
These limited distance modems feature a rugged aluminum enclosure small enough to mount on the back panel of VDT units, saving valuable desk and floor space.
The LDM30 line driver is designed for full-duplex, asynchronous operation over two, DC-continuity, non-loaded, twisted-wire pairs. Through special high speed optically-coupled circuits they may communicate at data rates up to 57,600 baud.
A self-powered model and a host-powered model are available. The self-powered unit uses 12V AC from a wall-mounted transformer while the host-powered unit takes ± DC power from pins 9 and 10 of the RS-232 connector.
The modem circuits - and, consequently, the host device - are protected from electrical transients due to lightning strikes or operation of heavy industrial equipment.
Features
- Industry leading RS-232 serial line driver from Dataforth
- Ideal for connecting RS-232 devices across long distances
- Offers protection for your serial devices against power spikes and surges
- Common mode isolation up to 500V DC surge
- For data transmission up to 12 miles (20km)
- Full data control lines including RTS, CTS, DTR, DSR
- Full 4-wire duplex or 2-wire simplex mode available
- Available with a pinned male DB25 connector (LDM30-P) or a socketed female DB25 connector (LDM30-S)
- Mounting : In-line Plug in
- Ports : 1 x RS-232
- Common Mode Isolation : 500V surge, 300V continuous
- Power : Host or External Powered
- Baud Rate Range : 0 - 57.6Kbps
- Max. Data Distance : 12 miles (20km)
- Modes : 4-wire full duplex, 2-wire simplex
- Channel Lines : TD, RD
- Control Lines : RTS, CTS, DTR, DSR, RLSD
- MTBF : 150,000 hrs
- Power : 12V AC @ 92mA or ±9 to ±15V DC @ 35mA
- Operating Temperature : 0C to +70C