Product Specifications
2
0
1
8
-1
2
23
Cold junctions
Cold junctions have a prewired Pt100 thermocouple on terminal openings 1 and 2 for
numerically correcting the thermoelectric voltage. Cold junctions are available exclusively in
blue. Use blue cold junctions for intrinsically safe circuits.
n
Cold junctions
•
Blue: LB9112A
n
Cold junctions with a protective cover
•
Blue: LB9111A
Figure 2.16
Cold junction dimensions
L = 33.3 mm for 6-pin term inals
Figure 2.17
Dimensions of a cold junction with a protective cover
L = 33.3 mm for 6-pin term inals
Coding pins
Coding pins provide a unique assignment between I/O modules and terminal blocks or the
associated field devices. To do this, the coding pins are pushed into the grooves provided in the
front sockets of the I/O modules. This prevents terminal blocks from being accidentally plugged
into another I/O module.
Cold junction
Cold junction with a protective cover
16.1
L
1
1
.1
1
2
1
2
14.5
L
3
9
(4
5
.6
)
6
.6
Warning!
Risk of confusing device connections.
When coding the front sockets of the I/O modules, ensure that the codes are mutually
exclusive. Otherwise there is the danger of incorrect mapping between devices and circuits in
explosion-hazardous areas.
