Electrical connection
The switch contacts employed in these devices are potential free and do not require a
power source.
Note:
Switch contacts and flow monitor have been optimally harmonized. After replacement of a
switch contact, the switch point must be readjusted.
The contacts open/change when the flow rate falls below the set value.
Grounding of the device:
When installing the device in a pipeline, make sure that the device is grounded via the
pipeline. This prevents dangerous potential differences from occurring
Switching capacity of contacts:
Contact rating
Type
Size
Contact function
Angle plug IP65
M12x1 plug IP67**
Cable connection (1 m) IP67
DS08.M
1/2“ 1 = N/O
230 V / 3 A / 60 VA
125 V / 3 A / 60 VA
230 V / 3 A / 60 VA
2 = SPDT
250 V / 1,5 A / 50 VA,
min load: 3 VA
125 V / 1,5 A / 50 VA,
min load: 3 VA
-/-
2X = SPDT for SPS
250 V / 1 A / 60 VA
-/-
-/-
3SM = Ex-N/O*
gas: < 30 V / 0,101 A / 0,76 W
dust: < 30 V / 0,25 A / 0,75 W
gas: < 30 V / 0,101 A / 0,76 W
dust: < 30 V / 0,25 A / 0,75 W
3UM = Ex-SPDT*
-/-
DS08.S
1/4“
1/2“
3/4“
1“
1 = N/O
250 V / 3 A / 100 VA
2 = SPDT
250 V / 1,5 A / 50 VA, min load: 3 VA
2X = SPDT for SPS
250 V / 1 A / 60 VA
-/-
-/-
3ST5 = Ex-N/O, T5*
3ST6 = Ex-N/O, T6*
-/-
-/-
250 V / 2 A / 60 VA (2 m
cable)
3UT5 = Ex-SPDT, T5*
3UT6 = Ex-SPDT, T6*
-/-
-/-
250 V / 1 A / 30 VA,
min load: 3 VA (2 m cable)
* Exact max. switching capacity: see ATEX documents
** Safety class M12x1 plug for DS08.M: IP65
DS08 Instruction manual 03/2020
page 9