External power connectors, Usb led, Pwr led – Measurement Computing USB-1096HFS User Manual
Page 15: Pull-up / pull-down resistors, Screw terminal wiring, External power connectors -2, Usb led -2, Pwr led -2, Pull-up / pull-down resistors -2, Screw terminal wiring -2
USB-1096HFS User's Guide
Functional Details
External power connectors
The USB-1096HFS has two external power connectors labeled
POWER IN
and
POWER OUT
on the enclosure.
The
POWER IN
connector is labeled
J3
on the board, and the
POWER OUT
connector is labeled
J4
on the
board.
Connect the
POWER IN
connector to the supplied +9 V external power supply (CB-PWR-9V3A). The
POWER
OUT
connector lets you power additional daisy chained MCC USB Series products from a single external
power supply. When running at full load, the USB-1096HFS draws 2.6 A from the supply. When using the
USB-1096HFS under full load conditions, do not daisy chain power to another MCC USB Series product.
Depending on your load requirements, daisy chained products may require a separate power supply. Refer to
"
Power limitations using multiple USB-1096HFS devices
" on page 3-6 for more information.
USB LED
The
USB
LED indicates the communication status of the USB-1096HFS. It uses up to 5 mA of current and
cannot be disabled.
USB
LED.
Table 3-1. USB LED Illumination
LED Illumination
Indication
Steady green
The USB-1096HFS is connected to a computer or external USB hub.
Blinks continuously
Initial communication is established between the USB-1096HFS and the computer, or data is
being transferred.
PWR LED
The
PWR
LED illuminates when external power is supplied. The USB-1096HFS incorporates an on-board
voltage supervisory circuit that monitors the external power supply. The
PWR
LED does not light under the
following circumstances:
!
when the input power falls below +6.0 V
!
when the input power goes above +12.5 V
!
when you connect the external power supply to the
POWER OUT
connector
(
J4
)
Pull-up / pull-down resistors
Each digital port group has three associated 10 kΩ pull-up/pull-down SIP resistor locations. Each SIP resistor is
shipped from the factory configured for pull-up. To configure individual ports for pull-down, de-solder the SIP
resistor pin connections and install the resistor with the common line at the
LO
end. Then re-solder the SIP
resistor pin connections.
Screw terminal wiring
The USB-1096HFS has four rows of screw terminals labeled
Port 1
through
Port 4
. Each row has 26
connections. The screw terminals provide the following connections:
!
96 digital I/O terminals (
A0
to
C7
for Port 1 through Port 4)
!
Four (4) ground terminals (
GND
)
!
Three (3) VDD power terminals (
5V
)
!
One (1) external event counter terminal (
CTR
)
Use 14 AWG to 30 AWG wire for your signal connections. Each screw terminal is identified with a label on the
board and on the underside of the enclosure lid. Refer to
for the signal name associated with each
board label.
3-2