PC / Terminal Wiring

The cable and adapters supplied with the 801G* should be suitable for most basic RS-232 hook-ups that use either 9 pin or 25 pin D-Sub connectors. In some cases, you may need to make your own spe- cial cable. The table below lists the connections re- quired to attach the 801G* to the RS-232 port on a terminal or PC type computer.

 

 

 

 

 

 

 

 

 

 

801GX

Signal

PC-AT

PC or Terminal

 

 

9 pin D-Sub

Direction

9-pin D-Sub

25-pin D-Sub

 

 

 

 

 

 

 

 

 

 

pin-1 NC

 

 

 

 

 

 

 

pin-2 Rx

<-----

pin-3 Tx

pin-2 Tx

 

 

 

 

 

 

 

 

pin-3 Tx

----->

pin-2 Rx

pin-3 Rx

 

 

 

 

 

 

 

 

 

 

 

pin-4

DTR

----->

pin-6

DSR

pin-6

DSR

 

 

 

 

 

 

 

 

 

 

pin-5

GND

-------

pin-5

GND

pin-7 GND

 

 

 

 

 

 

 

 

 

 

pin-6 NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pin-7

RTS

----->

pin-8

CTS

pin-5

CTS

 

 

 

 

 

 

 

 

 

 

 

pin-8

CTS

<-----

pin-7

RTS

pin-4

RTS

 

 

 

 

 

 

 

 

 

 

pin-9 NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 5-6PC and Terminal Connections

This table assumes that you will be connect- ing the 801G* to an IBM-compatible computer having either a 9-pin or 25-pin serial connec- tor. You will note that the pin numbers are different for each type of connector.

Communication with the 801G* is via RS-232C protocol using factory deafult settings of 2400 baud, 8 data bits, 1 stop bit, no parity, no handshake, full duplex.

The current firmware allows you to increase the baud rate beyond 2400 using a RTS/CTS handshake. We therefore recommend that you wire the RTS and CTS signals if you plan to operate the serial port at faster than 2400 baud*.

The 801G* outputs a positive voltage on DTR to indicate that it is powered on. Some com- puters hang if this output is not connected to their DSR input.

Connecting to a PC or Terminal

5-11

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Quantum Data 801GC, 801GF, 801GX manual PC / Terminal Wiring