Summary of Contents for Omega A1000 Series
- Page 1 User’ s Guide MADE IN Shop online at omega.com e-mail: info@omega.com For latest product manuals: omegamanual.info A1000 and A2000 Series Converter Boxes...
- Page 2 Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
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Page 3: Users Manual
A1000 and A2000 SERIES CONVERTER BOXES USERS MANUAL R E V I S E D : 1 0 / 2 7 / 0 4 Omega Engineering One Omega Drive P O Box 4047 Stamford, CT 06907 Phone: 1-800-DAS-IEEE Fax: 203-359-7990 e-mail: das@omega.com... - Page 4 A1000 & A2000 USERS MANUAL 2...
- Page 5 3 A1000 & A2000 USERS MANUAL...
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Page 6: General Description
A1000 & A2000 USERS MANUAL 4 GENERAL DESCRIPTION The A1000 and A2000 series converter boxes convert RS-232 communications signal levels to the correct electrical signals required by RS-485. The RS-485 communications standard is recommended when many modules, or other addressable devices, must be connected to a host computer over long distances. -
Page 7: Specifications
5 A1000 & A2000 USERS MANUAL SPECIFICATIONS Max Common Mode Voltage: 1500Vrms, 1 minute duration. NRZ asynchronous data format; 1 start bit, 7 data bits, 1 parity bit and 1 stop bit. Baud Rates: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200. - Page 8 A1000 & A2000 USERS MANUAL 6 A 1 0 0 0 / 2 0 0 0 R S - 2 3 2 D B - 9 C O N N E C T O R The A1000 and A2000 contain a female DB-9 connector normally used with modems or other Data Communications Equipment (DCE).This connector should be connected to a host computer, or controller, when converting RS-232 signals to RS-485.
- Page 9 7 A1000 & A2000 USERS MANUAL This connector is left open when the A1000 or A2000 is used as an RS- 232-to-RS-485 converter. A 1 0 0 0 / 2 0 0 0 R S - 4 8 5 O U T C O N N E C T O R The A1000 and A2000 converters contain a four-pin screw terminal plug labelled RS-485 OUT.
- Page 10 A1000 & A2000 USERS MANUAL 8 BAUD RATE The A1000 and A2000 series converters each contain a 10-position DIP switch located on the rear panel. The DIP switch is used to select the correct communications baud rate and must be set to the same value as the devices connected to the RS-485 OUT connector.
- Page 11 9 A1000 & A2000 USERS MANUAL should be placed at each end of the RS-485 cable. Please refer to Figure 2 for a typical RS-485 system application. The A1000 and A2000 each contain the biasing and termination resistors necessary to interface any equipment on an RS-485 network. These resistors are switch-selectable making it easier to interface the A1000 and A2000 to other pieces of equipment that may or may not contain the biasing and/or termination resistors.
- Page 12 A1000 & A2000 USERS MANUAL 1 0 A2000 RS-485 TERMINATIONS Proper biasing and termination resistors in the A2000 may be enabled by using the internal jumpers contained in the A2000. Figure 3 shows the location of the jumpers on the A2000 printed circuit board. The jumpers are shown in the factory setting to enable a resistor, insert a jumper into the jack position adjacent to the resistor nomenclature written on the A2000 printed circuit board.
- Page 13 1 1 A1000 & A2000 USERS MANUAL Figue 4a,b and c show simple wiring diagrams for both the A1000 and A2000 used as RS-232/RS-85 converters and RS-485 repeaters. Figure 4a Wiring diagram for RS-232/RS-485 converter with host DB-9 connector. Figure 4a Wiring diagram for RS-232/RS-485 converter with host DB-25 connector.
- Page 14 A1000 & A2000 USERS MANUAL 1 2 Figure 4c Wiring diagram for RS-232/RS-485 converter and RS-485 repeater .
- Page 15 In no event shall OMEGA be liable for consequential, incidental or special damages. CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity;...
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Page 16: Data Acquisition
Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at omega.com TEMPERATURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers & Process Monitors...