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optris CTex LT0 pages
More Precision.
optris® Ctex
optris® CT for the use in hazardous areas
FEATURES
- Cost saving solution by simple concept
- Sensing head as simple electrical device enables
installations in hazardous locations without problems
- Energy limitation with appropriate zener barriers
(STAHL) with approval for zone 1 (PTB 01 ATEX 2053/
E II (1/2) GD [EEx ia/ib] IIC/IIB)
Concept
®
- optris CT sensing heads are defined as simple electrical
devices (according to EN 50014)
- no special approval for intrinsic safety necessary
®
- optris CT gets intrinsically safe by limitation of the energy
with two double zener barriers, type 9002/22-032-300-111
(R. STAHL AG)
1)
Scope of supply
- CTLT - Sensor (optics 2:1, 15:1, 22:1) with cable length
3 m, 8 m or 15 m (selectable)
- aluminum housing with mounting appliance for two zener
barriers and CT electronics
- 2 zener barriers, type 9002/22-032-300-111 (R. STAHL
AG)
1)
1)
NOTE: The functionality and correct reading of the CT sensor
can only be guaranteed, if the recommended barriers are used.
Connection diagram
safe area
hazardous area
housing CA-215
aluminum
mounting
rail
TP+ (yellow)
3
TP- (green)
PT1000 (white)
R1
PT1000 (brown)
R2
C1
C2
shield
shielded cable
type FEP TD 833CF, ma. 15m
4
3
4
9002/22-032-300-111
1
TP+ (yellow)
2
zener barrier
TP- (green)
PT1000 (white)
9002/22-032-300-111
1
PT1000 (brown)
2
zener barrier
shield
/ PA
/ PA
Sensing head: “simple electrical device”
(according to EN 50014)
The PA-terminals of the barriers must be grounded.
/ PA
Optris CT
electronics
