MKS ESP302-GPIB-ADPT, Руководство пользователя

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14 | ESP302-GPIB-ADPT
A1387A0-EDH0429En1010 11/21
USER's MANUAL
2.5 Serial Interface
The ESP302-GPIB-ADPT provides RS-232 signals on a rear panel DE-9P male connector. The choice
of serial signals is selected by internal jumpers and factory settings. Signal pinouts are listed in Table
2.
2.5.1 Baud Rate
Baud rate 19200 baud.
2.5.2 Data Character Format
Data bits 8 data bits per character
Parity None
Type Asynchronous character
Stop bits 1 stop bits per character
2.5.3 RS-232 Specifications
The ESP302-GPIB-ADPT has single-ended RS-232C drivers and receivers and is designed to operate
as a DTE device with up to 50 feet of cable.
Signals Txd, RxD, RTS, CTS and Ground
Transmit > 6 Vdc = Logic "0" (Data '0') or Control signals On
Levels <-6 Vdc = Logic "1" (Data '1') or Control Signals Off
Receive ±1.5 Vdc minimum, ±25 Vdc Maximum
2.5.4 Flow Control
Large date transfers exceeding one buffer in length are handled by holding off data flow until the buffer
is empty and then restarting the data flow. The ESP302-GPIB-ADPT uses Request-to-Send and Clear-
to-Send signals to control the serial data flow. The signals are always enabled. Data flow is not
controlled by X-on/X-off protocol.
2.5.5 Parity Generation/Checking
Transmitted characters are sent with no parity. Checking received characters for parity is not
supported.