6
Chapter 2
Installing the USB-ERB08
Unpacking
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the device from its packaging, ground yourself using a wrist strap or by simply
touching the computer chassis or other grounded object to eliminate any stored static charge.
Contact us immediately if any components are missing or damaged.
Installing the software
Refer to the MCC DAQ Quick Start and the USB-ERB08 product page on our website for information about the
available software.
Install the software before you install your device
The driver needed to run the USB-ERB08 is installed with the software. Therefore, you need to install the
software package you plan to use before you install the hardware.
Configuring the hardware switches
The USB-ERB08 has banks of onboard switches that configure the relay logic polarity and relay power-up
state. Configure these switches before you connect the external power supply to the USB-ERB08. Factory-
configured default settings are listed in the table below. Refer to Figure 5 on page 9 for the location of each
switch.
Default switch configuration
Board label
Description
Default setting
INVERT NON-INVERT
S1
Configures the relay control logic parity per relay bank for invert or
non-invert logic.
Non-invert
Pull DOWN PULL UP
S2
Configures the relay power-on state per relay bank for pull-up or
pull-down.
Pull-down
Each DIP switch configures one relay group. The switch labeled
CL
configures relays 1 through 4, the switch
labeled
CH
configures relays 5 through 8.
Figure 2. Typical board switch
Port CL consists of relays 1 through 4, and Port CH consists of relays 5 through 8.
Remove the device from the enclosure to access the onboard switches
To change the configuration of a switch, you must first remove the USB-ERB08 from the enclosure.
Relay control logic polarity switch (S1)
Configure the
Invert/non-invert
switch (S1) to set the relay control logic polarity for each relay bank for invert
or non-invert. By default, this switch is shipped with all banks configured for non-inverted logic, as shown in