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Product Description
1.4.2
3TK2845-.BB41/-.BB42/-.BB44 Multi-Function Devices (Stop Category0+1)
Standard operation
Sensor block D is inactive during standard opera-
tion (key-operated switch OFF).
When using a sensor at sensor blocks A to C,
output blocks I and II switch off safely without
delay and III and IV switch off with a time delay.
Service operation
When sensor block D is active (key-operated
switch ON), sensor block C is switched simulta-
neously to the inactive state. The output blocks II
(not delayed) and III (time delayed) are switched
off safely. When using a sensor at sensor blocks
A and B, the output blocks I (without delay) and
IV (time delay) switch off safely.
A
Cascading
Feedback
B
Sensor
C
Sensor
D
Key-operated
switch
Fig. 1-4: 3TK2845-.BB41/-.BB42/-.BB44 safety logistics Stop Category 0+1
*
The sensor connected at block D must fulfill the same safety requirements as the
sensors at block C.
1.4.3
Order Numbers
Stop
Safe outputs isolated
Cat.
without
with delay
delay
0
2
0 + 1
1
0 + 1
1
0 + 1
1
th
*) 8
digit of the Order No.: 1 = Screw connection, 2 = Spring-loaded terminal connection
Table 1-2: Order numbers of the various device versions
1-6
&
R
S
ON
1
Safe electronic outputs
without
with delay
delay
2
1
1
1
1
1
1
t
V
&
t
V
Time delay
—
1
up to 3 seconds
1
up to 30 seconds 3TK2845-.BB42
1
up to 300 sec-
onds
3TK2845 Multifunction Device Manual
GWA 4NEB 926 2087-02
A
I
B
II
C
III
D
IV
A
I
B
II
C
III
t
V
D
IV
t
V
I
Relay output
w/o delay
II
Electronic output
w/o delay
III
Relay output
with delay
IV
Electronic output
with delay
Order No.
*)
3TK2845-.BB40
*)
3TK2845-.BB41
*)
*)
3TK2845-.BB44
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