DGH A1000 series Spécifications

A1000 and A2000 SERIESCONVERTER BOXESUSERS MANUALREVISED:5/1/95DGH CORPORATIONPO BOX 5638MANCHESTER, NH 03108TELEPHONE: 603-622-0452FAX: 603-622-0487W

A1000 & A2000 USERS MANUAL 10Figure 4c Wiring diagram for RS-232/RS-485 converter and RS-485repeater .

A1000 & A2000 USERS MANUAL 2GENERAL DESCRIPTIONThe A1000 and A2000 series converter boxes convert RS-232communications signal levels to

3 A1000 & A2000 USERS MANUALSPECIFICATIONSMax Common Mode Voltage: 1500Vrms, 1 minute duration.NRZ asynchronous data format; 1 start bit, 7 dat

A1000 & A2000 USERS MANUAL 4A1000/2000 RS-232 DB-9 CONNECTORThe A1000 and A2000 contain a female DB-9 connector normally usedwith modems or o

5 A1000 & A2000 USERS MANUALThis connector is left open when the A1000 or A2000 is used as an RS-232-to-RS-485 converter.A1000/2000 RS-485 OUT

A1000 & A2000 USERS MANUAL 6BAUD RATEThe A1000 and A2000 series converters each contain a 10-position DIPswitch located on the rear panel. The D

7 A1000 & A2000 USERS MANUALshould be placed at each end of the RS-485 cable. Please refer to Figure2 for a typical RS-485 system application.T

A1000 & A2000 USERS MANUAL 8A2000 RS-485 TERMINATIONSProper biasing and termination resistors in the A2000 may be enabled byusing the internal j

9 A1000 & A2000 USERS MANUALFigue 4a,b and c show simple wiring diagrams for both the A1000 andA2000 used as RS-232/RS-85 converters and RS-485