Serial I/O - ICSDataCom

Serial I/O
Converter Automatically Enables Transmitter:
RS232 to RS422/485 Converters ■ MA485F25, MA485F9
■ Interface Conversion:
• Ideal RS232 to RS422/RS485 converters for 2-wire or
4-wire systems.
• Includes logic to automatically tristate local RS485
transmiter when not transmitting to prevent blocking the
transmission line.
• Both models have a removable screw type terminal strip
for easy connection to your RS422 or RS485 cable.
Includes TX and Rx signal pairs and power connections.
■ Models:
• Model 485HF25 has 25-pin female connector for direct
plug in to PC COM ports.
• Model 485F9 has 9-pin female connector for direct plug in
to 9-pin PC COM ports.
Ordering Code:
MA485F25 125.00 $
Magic RS232 to RS422/RS485 Converter with female DB-25 connector. Includes US
115 VAC power adapter and manual on CD-ROM
MA485F9 125.00 $
Magic RS232 to RS422/RS485 Converter with female DE-9 connector. Includes US
115 VAC power adapter and manual on CD-ROM
Web: www.icsdatacom.com
Specifications:
MA485F25, MA485F9
Data Com
Input voltage Space or On +2.4 to +30 V
Mark or Off -30 to +0.8 V
Input impedance 5 kohm typical
RS232
Output Volt +9 to -9 V
RS485
Output 1.5 V into 27 ohm (32 receivers)
Output tristated when not ransmitting.
Termination Internal Receiver Termination 120 ohm when jumper set to
‘in’
Data rate 115.2 kbaud up to 1,200 meters
General
Power
+5 to +12 VDC at 50 mA typ, 100 mA max.
Temperature 0 to 60°C operating, -20 to +70°C storage
Amplicon Liveline Data COM Products
55