Specifications

Continuous Operation F-2
For dedicated output-only applications the RECEIVE input of RS-232
modules serves no purpose and may be disconnected to eliminate one wire
connection to the host. In this case, be sure to connect the RECEIVE input
to GND to prevent a line break condition.
In continuous mode, a module will output data after every A/D conversion,
or approximately eight times a second. For baud rates of 300 and 600, the
repetition rate is limited by the time required for communications.
When using higher baud rates, you may notice a slight pause in the data
output after every 15 conversions. This pause is created when the module
performs an internal auto-calibration cycle and is part of normal operation.
Setup with computer
The first issue before configuring the modules is to determine the
application baud rate. This is the data rate for communicating information
from the analog input module to the analog output module. This value is
normally governed by the modems being used or the length of cable in
hard-wired systems. Some modems communicate at many baud rates
while others are limited to one or two baud rate values. Hard-wired
systems that run over long distance should consider baud rates of 9600
baud or less. Remember, only eight new readings will be transmitted
from the analog input module in one second and those readings will be
transmitted about once every 125 milliseconds. Therefore, the highest
baud rates are not really necessary.
Once baud rate is determined, the modules can be properly configured.
In most cases, the majority of other pre-installed factory settings in both
the analog input and output module will work “as is”. The Baud Rate is
the only parameter that must be changed in the analog input module.
The Baud Rate and “Continuous Enabled” bit must be changed in the
analog output module.
Step1. The S1000 utility software is the best way to alter the setup
message in each module. This program will run on any personal com-
puter that is DOS compatible. The configuration process for both mod-
ules should take about 10 minutes after all wiring connections have been
made.
Connect the analog input module to a computer serial port (either COM1:
or COM2:) using the “Figure 1.1 RS-232C Quick Hook-Up” drawing in
Chapter 1 of this users manual. Note that a power supply is also re-
quired. Once the connections are made turn the power supply on and