Velleman VM140 Manual De Instrucciones página 5

1 USB-connector
2 12VDC
Digital inputs
3
1, 2, 3, 4
Digital inputs
4
5, 6, 7, 8
Digital outputs
5
1, 2, 3, 4
Digital outputs
6
5,6,7,8
Analogue inputs
7
1,2,3,4
Analogue inputs
8
5,6,7,8
Analogue outputs
9
1,2,3,4
Analogue outputs
10
5,6,7,8
Addressing of the
11
selection jumpers
12 Max. A/D voltage
Max. D/A output
13
voltage
14 PWM control LED
CPU "run mode"
15
LED
16 CPU RC/TX LED
17 "POWER ON" LED
18 "USB" LED
Digital input indica-
19
tion
Digital output indi-
20
cation
Connection of the VM140 with the USB port of your PC
Power supply connection. Connect a 12V non-regulated adapter supplying
min. 300mA
Inputs need to go "LOW" externally to activate (connect with the GND).
These outputs are open collector outputs. When active, the transistors in IC4
will conduct and a "connection" will be established between GND and the
output in question. The charge you wish to feed, like a LED, relay ..., must
receive an external tension. Connect the "CLAMP" connection with the + of
this external power supply so as to protect the transistor array.
These are measuring points with which you can digitalize and read out an
analogue voltage through the PC. The analogue inputs expect a DC voltage
between 0 and 5V or between 0 and 10V. Select with the jumpers AD1 to AD8
(see n° 13). Attention: Supplying a voltage to the A/D inputs higher than 5 or
10V can cause irrevocable damage to the VM140 (IC10/11)!
Determination with software of the DC voltage on these outputs. Depending
on the jumpers DA1 to DA8 you can establish this voltage between 0 and 5V
or between 0 and 10V. On pin 2 of this connector (SK9) you can also find the
PWM output. The PWM output is an open collector output whose pulse width
is adjustable.
With the jumpers A1, A2 and A3 you can attribute a unique address to each
connected VM140. Up to 8 boards can be connected. If you have only 1
VM140, establish its address as "0".
With the jumpers AD1-AD8 you can select the voltage range for the corre-
sponding A/D inputs between 0 to 5V (closed) or 0 to 10V (open).
With the jumpers DA1-DA8 you can select the max. voltage range for the
corresponding D/A outputs between 0 to 5V (open) or 0 tot 10V (closed)
This LED will light if the PWM output is active. The brightness of the LED is
analogous to the pulse/pause relation.
Lights when the CPU of the VM140 (IC6) is functioning correctly.
This LED lights in case of data exchange between the CPU and the USB
interface controller (IC3). If the LED does not light when the board is
powered, check the USB controller (IC3) or the optical separation (IC1 & 2)
for faults.
Lights in case of the presence of the 5V power supply for the USB controller.
Attention: The VM140 is powered through the USB port of your PC and does
not guarantee operation of the power supply section of the VM140's CPU and
I/O section.
Blinks during USB connection and lights at every successful connection be-
tween the USB chip in your PC and the VM140.
These LEDs turn out when a corresponding input goes "LOW" (connection of
the input with GND) through an external contact or an external open collector
input.
These LEDs light if a corresponding output is active, i.e. when a connection is
established between an output pin and GND (open collector output).
Connections
5