beautypg.com

Remote/local operation, Rs232 interface, Rs232 interface connector – AMETEK XDL Series II User Manual

Page 28: Rs232 connections

background image

27

By default all interfaces are live at all times. It is however possible to configure the privileges for a
particular interface to either “read only” or “no access” from the Web page interface. The status
of the interface privileges may be viewed, but not changed, from the front panel.

To view the interface privileges the CONTROL mode must first be set to 2 (i.e. Output 2 only
selected). Press SHIFT, Bus Type to first display the status of the GPIB interface. To view the
privilege status of another interface, scroll through the interface list using the Jog control until the
required interface is displayed. The status will be shown as either

Full

,

oFF

or

rEAd

.

Remote/Local Operation

At power-on the instrument will be in the local state with the REM indicator off. In this state all
keyboard operations are possible. When the instrument is addressed to listen and a command is
received the remote state will be entered and REM will be turned on. In this state the keyboard is
locked out and remote commands only will be processed. The instrument may be returned to the
local state by pressing the LOCAL key; however, the effect of this action will only remain until the
instrument is addressed again or receives another character from the interface, when the remote
state will once again be entered.

RS232 Interface

RS232 Interface Connector

The 9-way D-type serial interface connector is located on the instrument rear panel. The pin
connections are as shown below:

Pin

Name

Description

1

RI

Passively asserted (+V through 10k

Ω)

2

TXD

Transmitted data from instrument

3

RXD

Received data to instrument

4

CTS

5

GND

Signal ground

6

RTS

Passively asserted (+V through 10k

Ω)

7

DSR

No internal connection

8

DTR

9

CD

No internal connection

RS232 Connections

The RS232 interface should be connected to a standard PC port using a fully wired 1:1 male-
female cable without any cross-over connections. Alternatively, only pins 2, 3 and 5 need be
connected to the PC, but with links made in the connector at the PC end between pins 1, 4 and 6
and between pins 7 and 8, see diagram.