5
SRB 308IT
Operating instructions
Safety-monitoring module
EN
8 Appendix
8.1 Wiring examples
Dual-channel control, shown for a guard door monitor with two
position switches where one has a positive break contact;
with external reset button
J
(Fig. 2)
•
Relay outputs: Suitable for 2-channel control, for increase in capacity
or number of contacts by means of contactors or relays with positive-
guided contacts.
•
The control system recognises wire-breakage, earth faults and
cross-wire shorts in the monitoring circuit.
•
S
= Feedback circuit
L1
J
S
K2
K1
K
B
K
B
K
A
K
A
K3
K3
K2
K1
34
53
41
54
42
23
24
13
S22
S21
S11
S12
A1 A1.1
F2
X1 X2 X3 X4 X5 X6
33
14
S31 S32
Y1
Y5
Y3
A2
F1
AC/
DC
Ui
UB
a)
Y4
Y2
Y6
K
A
K
B
N
Fig. 4
a) Logic
8.2
Start coniguration
External reset button (with edge detection) (see Fig. 5)
•
The external reset button is integrated as shown.
•
The function "trailing edge" is set by means of the "AF" switch located
at the front of the enclosure (switch position = 1).
• The safety-monitoring module is activated by the reset (after release)
of the reset button (= detection of the falling edge). Faults in the reset
button, e.g. welded contacts or manipulations which could lead to an
inadvertent restart, are detected in this coniguration and will result in
an inhibition of the operation.
Automatic start (Fig. 6 and 7)
•
The automatic start is programmed by connecting the feedback circuit
to the terminals X3-X5.
•
The time offset between the channels 1 and 2 is approx. 100 ms. An
endless time offset between the channels 1 and 2 is programmed by
bridging the terminals X3-X6.
•
Caution:
Not admitted without additional measure due to the risk of
gaining access by stepping behind!
•
within the meaning of EN 60204-1:2006 paragraph 9.2.5.4.2 and
10.8.3, the operating mode "automatic start" is only restrictedly
admissible. In particular, any inadvertent restart of the machine
must be prevented by other suitable measures.
X4
J
Y6
X3
AF
1
0
a)
X5
Y6
a)
X3
X6
X3
AF
1
0
X5
Y6
X3
AF
1
0
a)
Fig. 5
Fig. 6: Time offset ∞
Fig. 7: Time offset 100 ms
Start-up test (see ig. 8 and 9)
•
As contacts for the start-up test additional auxiliary contacts must
be provided.
X5
Y6
X3
X6
X3
AF
1
0
a)
X5
Y6
X3
X6
X3
AF
1
0
a)
Fig. 8
Fig. 9
8.3
Sensor coniguration
Single-channel emergency stop circuit with command devices
to DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 10)
•
Wire breakage and earth leakage in the control circuits are detected.
•
Possible control categories:
– 1 to EN 954-1
– 2 – PL d to DIN EN ISO 13849-1
Dual-channel emergency stop circuit with command devices
to DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 11)
•
Wire breakage and earth leakage in the control circuits are detected.
•
Cross-wire shorts between the control circuits
are not detected.
•
Possible control categories:
– 3 to EN 954-1
– 4 to EN 954-1 (with protective wiring)
– 4 – PL e to DIN EN ISO 13849-1 (with protective wiring)
Dual-channel emergency stop circuit with command devices
to DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 12)
•
Wire breakage and earth leakage in the control circuits are detected.
•
Cross-wire shorts between the control circuits are detected.
•
Possible control categories:
– 4 to EN 954-1
– 4 – PL e to DIN EN ISO 13849-1
S12
Y3
a)
S11
S22
Y4
S12
S32
S31
S12
Y3
a)
S11
S22
Y4
S21
S32
S31
S12
Y3
a)
S11
S22
Y4
S21
S32
S31
Fig. 10
Fig. 11
Fig. 12
