External Dual Connector: 07 St - ABB AC 31 Technical Manual

ABB Control - AC 31
1SBC 260400 R1001-b 06.99
Technical specifications

7.4.3. External dual connector: 07 ST 51

This is a dual connector which enables an easy connection of analog sensors to the 40 and
50 series products (XM 06 B5 or XE 08 B5), some other functions are also added with this
connector:
- Possibility to change a sensor without fall-out the other sensors
- Additionnal protection against short-circuit in case of 4- 20 mA
Switches for selection
channels 0 and 1 or 6 and 7
The switches on the 07 ST 51 are used to select the configuration of channels, one switch for
one channel. Two possibilities of configuration, current protection or cabling PT100/PT1000.
- Position A : Configuration current protection for 4 – 20 mA
- Position B : Configuration for PT100 / PT1000
It includes two connectors, J1 connector is used to cabling the different input sensors, and J2
connector may be used to connect the shielding of the different analog cables.
Warning: In the configuration current 4 – 20 mA, the sensor should be able to provide 20 mA
with min 10 V d.c. Moreover, the input is not protected against voltage between 10 up to 18 V
d.c. and can give an error or destroy the input.
SB
SA SA
J1-1 J1-2
Electrical diagram inside of 07 ST51
J2 Connector for
shield of
different sensors
J1 Connector for
cabling of different
input sensors
J2-1 J2-2 J2-3 J2-4 J2-5
SB SB
SA
J1-3
J1-4 J1-5
Switches for selection
channels 2 and 3 or 4 and 5
SB
SA
J1-6
J1-8
J1-7
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