Rear panel connectors, Status leds – Measurement Computing IOtech 640 Series User Manual
Page 20
3-2 Connectors, Indicators, and Cables
878893
640 & 650 Series
Status LEDs
640 and 650 Series modules have 2 LEDs on the front panel. The LEDs function as
follows:
Power LED: The “Power” LED blinks during device detection and initialization; then remains on solid as
long as the module has power. If there is insufficient power the LED will go off.
Active LED: This LED is on whenever active communication is taking place between the 640 or 650 and the
host PC. Note that the Active LED will be on solid during a data acquisition.
Rear Panel Connectors
IOtech 640 [or 650] Rear Panels
IOtech 640 and 650 “e” and “u” version rear panels are identical aside from their interface ports, with the
“e” versions being for Ethernet and the “u” versions being for USB. Both rear panels include a #6-32
chassis ground, a DB9-Digital I/O port, and an External Power connector.
#6-32: Provides a connection point for Chassis Ground via use of a #6-32 machine screw.
ETHERNET (Applies only to 640e and 650e): The 10/100BaseT Ethernet port can connect to the
Ethernet port of the host PC, or to an Ethernet network. Either of two Ethernet patch cables may be used to
make the connection. CA-242 is a 1.5 foot cable. CA-242-7 is a 7-foot cable. Note that the Ethernet
connector has two built in LEDs that indicate Ethernet status. These are discussed below. Note that the
Ethernet cable length must be <10m in order for the system to be CE Compliant.
Two rectangular ETHERNET Status LEDS (LINK and ACTIVE) are built
into the frame of the Ethernet jack.
LINK – “ON” indicates that a link via Ethernet exists.
ACTIVE – “ON” indicates that the port is receiving or transmitting traffic.
USB2.0 (Applies only to 640u and 650u): The USB port for 640u and 650u is intended for USB2.0 high-
speed (480Mbps). Chapter 2 includes information regarding USB2.0 and USB1.1. However, for these
units connection to a USB2.0 port on the host PC is required.
Rear Panel for
640e & 650e
ETHERNET
Rear Panel for
640u & 650u
USB