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LDM35-P_LDM35-S信號供電的有限距離調制解調器OMEGA歐米茄

信號供電：無需電源

光學隔離：斷開接地回路

重型浪涌保護器：防止雷擊損壞

LED診斷指示燈：簡化安裝和系統故障排除

在9600波特時行駛2英里（3.3公里），19200時行駛半英里（0.8公里），1200波特時行駛7英里（11.7公里）

四線全雙工，雙線單工

連接器的選擇

寬工作溫度范圍，0至+70°C

零調制解調器開關

LDM35-P_LDM35-S信號供電的有限距離調制解調器OMEGA歐米茄

Signal-Powered: No Power Source Required

Optical Isolation: Breaks Ground Loops

Heavy Duty Surge Protectors: Prevents Lightning Damage

LED Diagnostic Indicators: Simplifies Installation and System Troubleshooting

Operation to Two Miles (3.3 KM) at 9600 Baud, One-Half Mile (0.8 KM) at 19,200, Seven Miles (11.7 KM) at 1200 Baud

Four-Wire Full Duplex, Two-Wire Simplex

Selection of Connectors

Wide Operating Temperature Range, 0 to +70°C

Null Modem Switch

The LDM35 Series of products 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 modems feature a rugged enclosure small enough to mount on the back panel of VDT units, saving valuable desk and floor space. The LDM35 Series does not require a power supply for operation. The use of low power circuits and a sensitive optical receiver allows the devices to derive all necessary power from the RS-232 data and control signal. They are designed for full-duplex, asynchronous operation over two, DC-continuity, non-loaded, twisted-wire pairs. Two-wire simplex operation may be accomplished over two wires. The modem circuits and, consequently, the host device are protected from electrical transients due to lightning strikes or operation of heavy industrial equipment. Each device features a convenient Data-Communication Equipment (DCE) to Data-Terminal Equipment (DTE) switch which reverses pins 2 and 3 of the RS-232 connector. For installation and troubleshooting, each unit has diagnostic Light-Emitting Diodes (LEDs) on the transmit and receive lines. The RS-232 connector may be ordered as a male or female 25-pin connector. Field connection is made through a modern, solderless, screw-termination assembly. Alternatively, a convenient four-wire modular phone jack is available. Model LDM35 is powered by the RS-232 data and control signals from its host computer or terminal device. It receives power from Data Terminal Ready, pin 20 or Request To Send, pin 4, and Transmitted Data, pin 2. Transmitted data may be on pin 3 when the DCE/CTE switch is in the DTE position. For proper operation, minimum required signal voltage level is ±6 V at 3.0 mA to 10.0 mA.

LDM35-P_LDM35-S信號供電的有限距離調制解調器OMEGA歐米茄

LDM35系列產品的設計允許視頻顯示終端（VDT）和其他RS-232設備通過足夠的距離連接，以覆蓋任何工業或機構建筑群。這些調制解調器的特點是堅固的外殼小到可以安裝在VDT設備的背板上，節省了寶貴的辦公桌和地板空間。LDM35系列不需要電源即可工作。低功耗電路和靈敏的光學接收器的使用使設備能夠從RS-232數據和控制信號中獲得所有必要的電源。它們設計用于全雙工、兩個以上的異步操作、直流連續性、無負載、雙絞線。兩線單工操作可以通過兩條線完成。因此，調制解調器電路和主機設備受到雷擊或重型工業設備運行引起的電氣瞬變的保護。每個設備都有***個方便的數據通信設備（DCE）到數據終端設備（DTE）的開關，它可以反轉RS-232連接器的插腳2和3。對于安裝和故障排除，每個單元的發射和接收線路上都有診斷發光二極管（LED）。RS-232連接器可訂購為25針插頭或插孔連接器。現場連接是通過***個現代的，無焊，螺絲終端組件。此外，還提供了***個方便的四線模塊化電話插孔。LDM35型由主機或終端設備的RS-232數據和控制信號供電。它接收來自數據終端準備就緒、針腳20或發送請求、針腳4和發送數據針腳2的電源。當DCE/CTE開關處于DTE位置時，傳輸的數據可能位于插腳3上。為了正常工作，3.0 mA至10.0 mA時所需的***小信號電壓水平為±6 V。