4
Operating instructions
Safety-monitoring module
PROTECT SRB 101EXi-1R
EN
5 cm
a)
b)
c)
d)
5 cm
5 cm
5 cm
Fig. 1
a) IP54 control box suitable for installation in Zone 2 according to
IEC/EN 60079-15 (ABTN NBR IEC 60079-15)
b) Air around the safety-monitoring module approx. 2,400 cm³
(8.25 × 16 × 18.1 cm)
c) Protection (suitable for Zone 2)
d) Clips (suitable for Zone 2)
Potential equalisation: wiring of the PA terminals (Fig. 2)
The grounding of intrinsically safe circuits must be carried out in
accordance with the requirements IEC/EN 60079-14 (ABTN NBR IEC
60079-14).
U
EXi
U
B
U
i
K1
K2
SRB
101EXi
-1R
0V X1 X2
S11 S12 S21 S22
13 14 21 22
PA PA A1 A2
2 x 1,5 mm
2
Fig. 2
3.4 Dimensions
All measurements in mm.
Device dimensions (H/W/D): 100 x 22.5 x 121 mm
4. Electrical connection
4.1 General information for electrical connection
As far as the electrical safety is concerned, the protection
against unintentional contact of the connected and therefore
electrically interconnected apparatus and the insulation of the
feed cables must be designed for the highest voltage, which
can occur in the device.
The electrical connection may only be carried out by autho-
rised personnel in a de-energised condition.
To avoid EMC disturbances, the physical ambient and opera-
tional conditions at the place where the product is installed,
must meet the provisions laid down in the paragraph "Electro-
magnetic Compatibility (EMC)" of DIN EN 60204-1.
Wiring examples: see appendix
5. Operating principle and settings
5.1 LED functions
• K1: Status channel 1
• K2: Status channel 2
• U
B
: Status operating voltage (LED is on, when the
operating voltage on the terminals A1-A2 is ON)
• U
i
: Status internal operating voltage (LED is on, when the
operating voltage on the terminals A1-A2 is ON and the fuse has not
been triggered).
• UEXi: Status internal operating voltage (LED is on, when the
operating voltage on the terminals A1-A2 is ON and the fuse F1
has not been triggered)
5.2 Description of the terminals
Voltages:
A1
+24 VDC
A2
0 VDC
Inputs:
S11-S12
Input channel 1 (+)
S21-S22
Input channel 2 (+)
S21-S22
Input channel 2 (–) (with cross-wire short
detection)
Outputs:
13-14
Safety release
21-22
Auxiliary NC contact as signalling contact
Start:
X1-X2
Feedback circuit and external reset
Signalling outputs must not be used in safety circuits.
5.3 Operating principle
• The SRB 101EXi-1R is a dual-channel safety-monitoring module for
monitoring emergency stop command devices, guard door monitors
and magnetic safety switches.
• When the safety circuits S11-S12 and S21-S22 and the feedback
circuit X1-X3 is closed, the safety-monitoring module is started and
the enabling circuit 13-14 is closed.
• The enabling circuit 13-14 is immediately opened when the emergen
-
cy stop command device or another safety equipment is operated.
• Through the signalling path 21-22 an external control of the switching
condition of the SRB 101EXi-1A can be signalled for instance.
• The safety-monitoring module can only be restarted, when both chan
-
nels K1 and K2 have been enabled.
5.4 Adjustment
Opening the front cover (see Fig. 3)
• To open the front cover, insert a slotted screwdriver in the top and
bottom cover notch and gently lift it.
• When the front cover is open, the electrostatic discharge requirements
must be respected and observed.
• After setting, the front cover must be fitted back in position.
Setting the switch (see Fig. 4)
• The cross-wire short monitoring function (factory setting) is program
-
med by means of the switch underneath the front cover of the safety-
monitoring module.
• The switch must only be operated in de-energised condition by means
of a finger or an insulated blunt tool.
• Pos. nQS (top): Not cross-wire short proof, suitable for 1-channel
applications with outputs connected to potential in the control circuits.
• Pos. QS (bottom), Cross-wire short proof: suitable for 2-channel appli
-
cations without outputs connected to potential in the control circuit s.
Only touch the components after electrical discharge!
