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Operating Instructions
Safety Switch STA...EX
ATEX cable gland M20x1.5
(included)
Clamping range Ø 6.5 ... 12 mm
Fig. 2: Dimension drawing for STA... without insertion funnel and STA... with insertion funnel
Fig. 3: Switching elements and switching functions
Necessary minimum travel + perm. overtravel
Approach direction
Horizontal (h)
Vertical (v)
Ø 5.3 (4x)
for M5 > 35 mm
ISO 1207/ISO 4762
M = 1.5 Nm
Cover screw
(4x, M = 1.5 Nm)
Protective plate
Earth conductor terminal:
Ground the switch via the
earth conductor terminal
to prevent electrostatic
charging.
Guard closed
and locked
E1
E2
Type
STA3-2131..
STA4-2131..
STA3-4121..
STA4-4121..
Actuator S...-SN
Actuator S...-LN
Standard
Insertion funnel
24.5 + 5
28.5 + 5
24.5 + 5
28.5 + 5
Auxiliary release
Locking screw
Actuating head with insertion funnel
Guard closed
and not locked
E1
E1
E2
E2
9
30
h
19
4
M = 1,5 Nm
4
9
Key to symbols
Guard locking ready for operation
/
Guard locking released
/
Guard
open
0,5
0,5
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