WIKA TR21 Mode D'emploi page 14

5. Commissioning, operation
DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
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EN
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This is protection class 3 equipment for connection at low voltages, which are separated
from the power supply or voltages of greater than AC 50 V or DC 120 V. Preferably, a
connection to an SELV or PELV circuit is recommended; alternatively protective measures
from HD 60346-4-41 (DIN VDE 0100-410).
Alternatively for North America
The connection can be made in line with "Class 2 Circuits" or "Class 2 Power Units" in
accordance with CEC (Canadian Electrical Code) or NEC (National Electrical Code).
Load diagram
The permissible load depends on the loop supply voltage. For communication with the
instrument with programming unit PU-548, a max. load of 350 Ω is admissible.
1083
833
583
0
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The instrument may only be installed and mounted by skilled personnel.
Operation using a defective power supply unit (e.g. short circuit from the
mains voltage to the output voltage) can result in life-threatening voltages
at the instrument!
Carry out mounting work only with power disconnected.
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Voltage U in V
B
24 30 36
WIKA operating instructions model TR21