External Power Connectors; Factory Reset Button; Signal Connections; Digital I/O - Measurement Computing E-DIO24-OEM User Manual

E-DIO24-OEM User's Guide

External power connectors

The E-DIO24-OEM requires 5 VDC external power. The board provides two options to connect external power:

2-pin terminal block header connector

Barrel connector
Measurement Computing offers an optional 5 volt AC adapter (PS-5V1AEPS) for connection to J4.
Connect a 5 VDC supply to either connector W1 or J4
Do not attempt to apply power to both external power connectors simultaneously.

Factory reset button

Use the factory reset button to restore network configuration settings to the factory default values. Refer to
Restoring factory default network settings
The reset button can also used to put the device into firmware update mode to recover if a firmware update fails.
Refer to the Universal Library software help topic for details.

Signal connections

Digital I/O

The E-DIO24-OEM has 24 DIO lines configured as three 8-bit ports – port 0, port 1, and port 2. Each bit is
individually configurable for input or output. The digital I/O transfer rate is 5 kHz, maximum for software-
paced operation on a local network.
You can specify a digital bit configured for output as a network alarm and change state when an Ethernet
connection with a host is established or lost. All alarm settings are selectable with software.
The digital I/O terminals can detect the state of any TTL-level input signal with CMOS output. Refer to the
schematic shown in Figure 4.
Figure 4. Schematic showing switch detection by digital channel P0D0
If you set the switch to the +5 V input, the digital bit reads TRUE (1). If you move the switch to GND, the bit
reads FALSE (0).
Hardware compatibility
The E-DIO24-OEM is functionally equivalent to USB-DIO24 Series and USB-1024 Series hardware. Software
programs written for those hardware devices can be run with the E-DIO24-OEM.
; pin 1 is the positive input.
W1
J4
on page 9 for instructions.
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Functional Details