trafag TOS S1 Instructions for use

Trafag Italia Srl Via Cremona 1
20025 Legnano (Mi)
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INSTRUCTIONS AND MAINTENANCE MANUAL
OPTICAL LEVEL SWITCH
Instruction H21042a 10/2017
OPTICAL LEVEL SWITCH
TYPE: TOS
Read and understand the operating instruction before starting any
work. Keep the instruction for later use.
1 GENERAL INFORMATION
1.1 Functional description
The optical sensor is located in a metallic body which includes a
polysulfone prism inside of which there is inserted an infrared
transceiver. As soon as the sensor is immersed in the liquid, the
refraction index of the prism changes and a large part of the infra-
red beam is dispersed in the liquid, causing the output to change
state.
1.2 Intended use
This optoelectronic level switch can be used exclusively for monito-
ring the levels of liquid media.
■Do not use with liquids with large contamination and liquids
that can crystallize. Do not use with liquids that are not compa-
tible with the contact parts.
■Do not use with abrasive liquids, highly viscous media and co-
lors.
■Do not use this optoelectronic level switch in hazardous areas.
Trafag shall not be liable for claims of any type based on operation
contrary to the intended use.
This optoelectronic level switch must be used only by skilled per-
sonnel with appropriate education and training.
1.3 Improper use
Any use beyond or different to the intended use is considered as
improper use.
Do not use this optoelectronic level switch in safety or emergency
stop devices.
2 COMMISSIONING AND
MOUNTING
■Mounting torque 15 ... 20 Nm
■Mount the instruments on the process connection according
the respective standards.
1 – Electrical connection
2 – Process connection
3 – Housing
4 – Prism
HORIZONTAL INSTALLATION
VERTICAL INSTALLATION
ANGLED INSTALLATION
1
3
2
4

2/2H21042
OPTICAL LEVEL SWITCH
TYPE: TOS
3 ELECTRICAL CONNECTION
4 MAINTENANCE AND CLEANING
■When using properly, the instruments does not need any par-
ticular maintenance
■Repairs must only be carried out by the manufacturer
■External cleaning of the instruments could be done by using a
moist cloth
■Do not use any aggressive cleaning agents
■Electrical connections must not come into contact with moisture
5 DISPOSAL
Dispose of instrument components and packaging materials in an
environmentally compatible way and in accordance with the coun-
try-specific waste disposal regulations.
Wiring and electrical output
Contact type
NPN PNP
Code
S1
S3
Output low in
no level condition
OUT
OUT OUT
15 ... 35 VDC
15 ... 35 VDC
15 ... 35 VDC
GND
GND GND
1
1 3
2
1 3
2
3
4 2
1
3
4 2
Output high in
no level condition
Output low in
no level condition
Output high in
no level condition
OUT
15 ... 35 VDC GND
Output low in
no level condition
OUT
OUT OUT
15 ... 35 VDC
15 ... 35 VDC
15 ... 35 VDC
GND
GND GND
1
1 3
2
1 3
2
3
4 2
1
3
4 2
Output high in
no level condition
Output low in
no level condition
Output high in
no level condition
OUT
15 ... 35 VDC GND
Documents Instructions H21042 www.trafag.com/H21042
Data sheet H20042 www.trafag.com/H20042
Additional information