6
Operating instructions
Safety-monitoring module
PROTECT SRB 101EXi-1A
EN
Due to the operating principle of the electronic fuse, the cus-
tomer must check that no hazard is caused by an unexpected
restart in circuits without reset button (automatic reset).
K
A
J
K
B
X3
X1
K
A
K
B
X3
X1
Fig. 7
Fig. 8
8.3 Sensor configuration
Single-channel emergency stop circuit with command devices
to DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 9)
• Wire breakage and earth leakage in the control circuits are detected.
• For the safety circuits monitoring, the emergency stop command
devices may be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 2 – PL d to DIN EN ISO 13849-1 possible
Dual-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.
• Cross-wire shorts between the control circuits
are not detected.
• For the safety circuits monitoring, the emergency stop command
devices may be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1 possible
(with protective wiring).
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 detected.
• For the safety circuits monitoring, the emergency stop command
devices may be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1
S12
S11
S22
S12
nQS
QS
S12
S11
S22
S21
nQS
QS
S12
S11
S22
S21
nQS
QS
Fig. 9
Fig. 10
Fig. 11
Single-channel guard door monitoring circuit with
interlocking devices to EN 1088 (Fig. 12)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected.
• For the safety circuits monitoring, the interlocking devices may be
designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 2 – PL d to DIN EN ISO 13849-1 possible
Dual-channel guard door monitoring circuit with
interlocking device to EN 1088 (Fig. 13)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits
are not detected.
• For the safety circuits monitoring, the interlocking devices may be
designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1 possible
(with protective wiring).
Dual-channel guard door monitoring circuit with
interlocking device to EN 1088 (Fig. 14)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• For the safety circuits monitoring, the interlocking devices may be
designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1
S12
S11
S22
S12
nQS
QS
S12
S11
S22
S21
nQS
QS
S12
S11
S22
S21
nQS
QS
Fig. 12
Fig. 13
Fig. 14
Dual-channel control of magnetic safety switches
to EN 60 947-5-3 (see Fig. 15)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits
are not detected.
• For the safety circuits monitoring, the magnetic safety sensors may
be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 3 – PL e to DIN EN ISO 13849-1 possible.
Dual-channel control of magnetic safety switches
to EN 60947-5-3 (see Fig. 16)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• For the safety circuits monitoring, the magnetic safety sensors may
be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 3 – PL e to DIN EN ISO 13849-1 possible.
The connection of magnetic safety switches to the SRB
101EXi-1A safety-monitoring module is only admitted when
the requirements of the standard EN 60 947-5-3 are observed.
As the technical data are regarded, at least the following
requirements must be met:
– Switching capacity: min. 3 W
– Switching voltage: min. 40 VDC
– Switching current: min. 75 mA
S12
S11
S22
S21
nQS
QS
S12
S11
S22
S21
nQS
QS
Fig. 15
Fig. 16
