Switch Contacts; Wiring Details - WIKA 230.15 Mode D'emploi

4. Requirements for use ... / 5. Switch contacts
Attention! In the case of gaseous substances, the temperature may
increase due to compression warming. In these cases it may be
necessary to throttle the rate of change of pressure or reduce the
permissible temperature of the pressure medium.
Table 1: Permissible medium temperature
Temperature class of the
ambient atmosphere
(ignition temperature)
T 6 ( > 85 °C)
T 5 ( > 100 °C)
all other temperature classes

5. Switch contacts

Switching function
The switching function is identified by the code '3'.
851.3 = SPDT contact
Electrical load
Max. switching voltage: 24 VDC / VAC
Max. load:
Max. current:

Wiring details

T he electrical connections must only be made by qualified

personnel
C able output 3 m long, conductor cross section 0.14 mm

flying leads
T he terminal assignment is stated on the pressure gauge's

connection plate
The gauges do not have integrated overcurrent
protection. If overcurrent protection is required,
this has to be provided externally.
T he instruments must be connected to the equipotential bonding

of the plant!
WIKA Operating instructions Model 230.15 without/with 851.3 per ATEX
Permissible maximum
medium temperature
(in the pressure system)
+70 °C
+85 °C
+100 °C
10 W
0.5 A
GB
2
,
7