OMEGA欧米茄DCP-485-P完全隔离RS-232/RS-485转换器
1500 VRMS Isolation with Optical Couplers and Power dc-to-dc Converter (6,000 Vdc, 1 min)
Industrial Surge Protection Devices and 15 KV ESD Protected RS-232 Inherent
Four LED Diagnostic Indicators
115.2 K BPS (BAUD) at 0.8 mile (1.3 km), 38.4 K BPS (BAUD) at 1 mile (1.6 km)
RTS, DTR, or Auto RS-485 Transmitter Control
Tri-State Outputs for Multidrop Applications, up to 32 Devices
Pluggable Solderless Screw Terminal Field Connections
Easily Mounts on Standard DIN Rail
2-Wire or 4-Wire RS-485
The DCP-485 is a compact RS-232- to-RS-485 converter which features a complete electrical isolation barrier and heavy duty electrical surge protectors. These devices feature a DIN rail mountable enclosure, for application to a junction box, a panel, a relay rack, the side of your computer, or anywhere a DIN rail can be mounted. Isolation is provided by optical couplers and a transformer-isolated dc-to-dc converter. The RS-232 connection is made through male or female EIA 9-pin D sub connectors, or a 3-wire RS-232 connection can be made through convenient pluggable screw terminals. The RS-485 connections are made through convenient pluggable solderless screw terminals. The DCP-485 series is designed for full duplex operation over two-wire pairs. Outputs are tri-state, allowing multidropping of up to 32 units. Data rates are up to 115.2 K bits per second (baud). Four diagnostic LED indicators are provided for installation guidance and system troubleshooting. The RS-232 interface includes Request To Send (RTS) and Data Terminal Ready (DTR), either of which can be used via a DIP switch to enable the RS-485 transmitter. Alternately, the DCP-485 offers automatic line switching: the RS-485 transmitter is enabled automatically by each character sent on the RS-232 Transmit Data (TD) line. Additionally, the RS-485 transmitter and receiver can be independently enabled continuously or under RS-232 control. A convenient null modem switch is provided for the data lines. Also, line termination switches independently connect line termination and line bias resistors to the RS-485 lines. The units are powered from wide-range voltages of +10 to +30 Vdc through pluggable solderless screw terminals.
SPECIFICATIONS
Baud Rates (bps): 115.2 K, 57.6 K, 38.4 K, 19.2 K, 9.6 K, 4.8 K, 0-2.4 K
Distance (miles): 0.8, 0.9, 1.0, 2.6, 3.5, 4.0, 7.0
Distance (km): 1.3, 1.5, 1.6, 4.2, 5.6, 6.4, 11.3
Wire Capacitance: Equal to 25 pF per foot and up to 32 multidrop units
Max Multidrop Units: 32
COMMON MODE ISOLATION
Surge: 6000 Vdc, 1 min
Continuous: 1500 Vrms
Differential Mode Surge Protection: dc input and RS232 inputs and outputs, RS485 inputs and outputs
Modes: Asynchronous 4–wire duplex, 2–wire half duplex, 2–wire simplex
Channel Lines: (1) TD, RD
Control Lines: (1) RTS, DTR
Null Modem Switch: 1 (Reverses RS232 pins 2 and 3)
RS485 Output Drive: 28 mA max/output
RS485 Input Impedance: 12 kΩ min/input
Power: 10 to 30 Vdc @ 150 mA max
TEMPERATURE
Operating Range: 0 to 60°C (32 to 140°F)
Storage Range: 0 to 70°C (32 to 158°F)
Relative Humidity: 0 to 95 %RH non-condensing
Altitude: To 4574 m (15,000')
Dimensions: 109 H x 84 W x 22.5 mm D (4.3 x 3.3 x 0.89")
Weight: 130 g (4.6 oz)
MTBF: (2) >100,000 hrs