Serial Communication; Hardware Requirements; Wiring Configuration And Baud Rate; Serial Communication Wiring - Ametek 5000 Instrument Manual

The 5000 Controller is equipped with an RS-485 serial interface port which allows the analyzer to be PC
driven and makes networking up to 32 analyzers possible. AMETALK , a software package developed
specifically for use with AMETEK Controllers, is now available. Please contact the nearest regional
sales office for more information about AMETALK .

Hardware Requirements

An RS-485 to RS-232 converter may be required depending on the PC configuration. AMETEK RS-485/
RS-232 adapter part number 265858005 includes a special circuit which disables the transmitter when
the analyzer is idle, a necessity for two wire networks. This special adapter also requires a line power
supply, P/N 265858007 (120V, only) or 269128002 (230 V, universal).
Wiring Configuration & Baud Rate
Network configuration may be two or four wire mode at 300 to 9600 baud/second; refer to figures 16a
and 16b for wiring diagrams. The controller CPU board is factory configured for four wire mode; all
dip switches on S1 are in the up position (on). To change to two wire operation, some dip switches on
S1 should be changed to the down position (off) as shown on figure 16b.
When configuring the analyzer software for serial communication, the value entered in the Configure
Menu as RS485_Baud must also take the wiring into account. Refer to the following table for correct
baud rate values.

NOTE

SERIAL COMMUNICATION

RS485_Baud Values
Baud Rate
9600
4800
2400
1200
600
300
System must be reset after changing baud rate. Cycle power or reboot by simultane-
ously pressing hidden keys as indicated.

CONFIG
CALIB
ALARM
4 Wire 2 Wire
0 10
1 11
2 12
3 13
4 14
5 15
TEST/
ANALOG
RANGE
Serial Communication 5-1