Rockwell Automation 1771-QB Linear Pos. - Manual (Page 41)

Installing the Linear Positioning Module
Chapter 5
5Ć2
Electrostatic Discharge
Under some conditions, electrostatic discharge can degrade performance or
damage the module. Observe the following precautions to guard against
electrostatic damage:
use a static-free workstation if one is available
touch a grounded object to discharge yourself before handling the module
don’t touch the backplane connector or connector pins
when you set the analog output switches, don’t touch other circuit
components inside the module
keep the module in a static-shielded bag when it’s not in use
You set the analog output DIP switches to define the range of output voltage or
output current for the analog output of each control loop.
There are two switch assemblies for each control loop: a single switch assembly
that selects voltage or current output and a dual switch assembly that sets the
current range. The current range switch has no effect if you choose a voltage
output. You must limit the voltage range through the analog range word in the
parameter block if you require a voltage range of less than +10 VDC. (See
Chapter 7.)
If the analog output will be controlling a current controlled device, such as a
servo valve, set the single switch for current and set the current range to match
the device. If your device requires a range that falls between those provided,
select the next higher range and reduce the range using the analog range word in
the parameter block.
Important: Although you can set the current range with the analog range word
in the parameter block, you’ll improve analog output resolution by first limiting
the range with the current range DIP switch.
To set the switches:
1. Lay the module on its side and locate the switches using Figure 5.1. All
switches are accessible from the right edge of the module without
removing the module cover.
Setting Analog Output
Switches