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4 Terminal Assignment
The electrical connections are made via cable glands to terminal blocks inside. The terminal
numbering can be found on the pcb. The maximum cable cross-section is 2,5 mm². The EMC-
installation instruction must be complied with.
Clamp
Description
Clamp
Description
1
Supply voltage
9
Screen/Enclosure
2
Supply Ground
10
+SG-Excitation Transducer Ch-1
3
Supply Ground
11
-SG-Excitation Transducer Ch-1
Galvanic insulation
12
+DMS-Signal Transducer CH-1
4
Analogue Ground
13
-SG-Signal Transducer Ch-1
5
Analogue Output 1 (10V/20mA)
14
Screen/Enclosure
6
Analogue Ground
15
+SG-Excitation Transducer Ch-2
7
Analogue Output 2 (10V/20mA)
16
-SG-Excitation Transducer Ch-2
8
Analogue Ground
17
+SG-Signal Transducer Ch-2
18
-SG-Signal Transducer Ch-2
Terminals “supply ground” and “analogue ground” are isolated galvanically. To unset this isolation
clamp 3 and 4 are to be bridged.
Notice:
The amplifier is to be operated with closed lid only.
4.1 Supply Voltage
The supply voltage is with version -24E in the range of 18 to 30 VDC and with version –E12 within 10
to 18 VDC. The presence of the supply/ internal operating voltage is indicated by the 2 green LEDs
on the pcb.
To protect the electronics an (to the supply voltage version corresponding) internal self-healing
“polyswitch-resettable®” fuse is built in. Whether an external additional fuse is necessary is to be
checked. However, an additional external fuse of 0,5 A is recommended.
If the indicator LEDs go off, the supply voltage and possibly existing external protection has to be
checked.
Notice:
During switch-on phase the amplifier is capacitive. Thus, the switch-on current is greater
than the operating current. This must be taken into consideration when dimensioning and selecting
the power pack, especially if several amplifiers are being wired to the same power source.
4.1.1 Galvanic Isolation
The supply voltage of the amplifier is galvanically isolated from analogue output, sensor supply and
sensor signal. To unset this isolation, clamp 3 and 4 have to be bridged.
