Ahlborn ALMEMO 2590-2, Руководство по эксплуатации

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Measuring inputs and additional channels
7.3 Potential separation
When organizing a properly functioning measuring setup it is very important to
ensure that no equalizing current can flow between sensors, power supply, and
peripherals. All points must therefore lie at the same potential and / or any un-
equal potentials must be electrically isolated.
The analog inputs are electrically isolated by means of photovoltaic relays; the
maximum potential difference permitted between them is 50 VDC or 60 VAC.
Sensors combined within one connector and sensors with their own power
supply, however, are electrically interconnected and must therefore be operat-
ed in isolation. The voltage at the measuring inputs themselves must not ex-
ceed 5 volts (between B, C, D, A and - ).
The power supply is isolated by the transformer in the mains adapter or by a
DC/DC converter in connecting cable ZA2690-UK. Data and trigger cables are
equipped with optocouplers. If analog output cables are not electrically isolated
the recording device or the sensors must be zero-potential.
ALMEMO ® 2590 17
M0 M1 M2 M3 M4
00
10
20
30
03
13
23
33
01
11
21
31
02
12
22
32
1. chan.
2. chan.
3. chan.
4. chan.
04
14
24
34
Device
internal
channels
Difference
M01-M00
sensor channels
2590-2
00
10
20
30
01
11
21
31
02
12
22
32
03
13
23
33
00
10
20
30
01
11
21
31
02
12
22
32
sensor channels
M0 M1 M2 M3 M0 M1 M2
2590-3 2590-4
sensor channels
Device
internal
channels
Device
internal
channels
Average
M2
M1
M0
datacable
AC
DC
DC
DC
ADC
uC
U-
U+
sensor
power supply
10..30V=
230V≈