wtw CL 298, Operating Manual

Page: 21 / 76

pH 298, LF 298, Oxi 298, Cl 298
Installation
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ba77196e03 07/2018
WARNING
No free wires are allowed to project into the housing. Otherwise, there is a
danger that areas safe to contact could come into contact with dangerous
voltages. This could result in life threatening electric shock when working
with the measuring transmitter. Always cut off any wires that are not in use
as closely as possible to the cable gland.
figure 3-8 Terminal assignment: Connection for relays, current outputs and Modbus
(enclosure lid, rear side)
1 X2 .1: Relay 2: Normally closed
X2 .2: Relay 2: Changeover contact (max. 250 V AC / 5 A)
X2 .3: Relay 2: Normally open
X2 .4: Relay 1: Normally closed
X2 .5: Relay 1: Changeover contact (max. 250 V AC / 5 A)
X2 .6: Relay 1: Normally open
2 X3 .1: Output: GND
X3 .2: Output 1: 0/4 ... 20 mA in relation to GND
X3 .3: Output 2: 0/4 ... 20 mA in relation to GND
3 X3 .4: RS485 / Modbus: A (+)
X3 .5: RS485 / Modbus: B (-)
X3 .6: RS485 / Modbus: GND
5 Feed the line into the enclosure through the cable gland.
6 Connect the wires to the terminal strip. When doing so, note the
specifications on the label under the terminal strip.
7 Tighten the coupling ring of the cable gland for the power line on the
enclosure.
1
2
X3
1 2 3 4 5 6
3
X3
X2
1 2 3 4 5 6