WIKA TR21-A Manual De Instrucciones página 13

5. Commissioning, operation
Output signal 4 ... 20 mA (standard)
■
Alternative pin assignments possible. For further information see order documentation.
DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
▶
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.
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
Voltage U
WIKA operating instructions model TR21
10 24
in V
B
Pin Signal
1 L+
2 VQ
3 L-
4 C
30 36
Description
10 ... 30 V
not connected
0V
not connected
13
EN