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9. Specifications
Recommended contact load for the magnetic snap-action contact model 821
Voltage
(DIN IEC 38)
DC / AC
V
230
110
48
24
Because of switching reliability, the switching current should not fall
below a value of 20 mA, and the switching voltage should not fall be-
low 24 V. For higher loads, and for instruments with liquid-filled cases,
we recommend using WIKA model 905.1x contact protection relays.
Limit values for the contact load with model 851
Switching voltage AC/DC:
Switching current:
Maximum switching power: 60 VA/W
Operating instructions pressure gauges with switch contact models 821, 851 or 830 E
Magnetic snap-action contact model 821
Unfilled instruments
resistive load
inductive load
cos ϕ > 0.7
DC
AC
mA
mA
mA
100
120
65
200
240
130
300
450
200
400
600
250
≤ 250 V
≤ 1 A
Filled instruments
resistive load
DC
AC
mA
mA
90
65
130
180
190
330
250
450
inductive load
EN
cos ϕ > 0.7
mA
40
85
130
150
23
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