AMS42/84-LAN
Page 5
3.7
Digital outputs
The AMS42/84-LAN features 4 digital outputs (
low
: 0V..0.7V;
high
:
3.0V..5V). All connections are led to the 15-pole Sub-D female con-
nector on the back of the device. The pin assignment is as follows:
Pin
Assignment
Pin
Assignment
3 DOut
1
14 Sync
IN
4 DOut
2
15 Sync
OUT
11 DOut
3
7, 8
Sync GND
12 DOut
4
1, 2, 6, 9, 10
n. c.
5, 13
DGND
4
Interfacing examples for digital outputs
Serial resistors in the output lines limit the current and protect the hardware from being destroyed.
4.1
Connecting an LED
Only so-called low-current LEDs can be
used, because they already work with 1mA
current.
Please also observe the total current listed
in the technical data (see chapter ).
4.2
Connecting a relay
A connected relay is ideal to switch higher
currents. Since the field coil of the relay
requires a higher current than provided by
the measurement system at one line, a tran-
sistor is connected ahead.
Relay boards with 8 relays or 16 semi-
conductor relays are available at bmcm.