Safety Technique
SAFEMASTER
Emergency Stop Module
BO 5988
Function Diagram
Pushbutton
on
Mains or
emergency-
stop (Off)
*
K1
K2
Block Diagram
A1
A2
A4 S11/A3(+) X1 X2 Y1 Y2 S12 S12 S22
Overvoltage and short
K2
K3
circuit protection
&
K23
24V ...
Mains
PE(-)
S21
All technical data in this list relate to the state at the moment of edition. We reserve the right
for technical improvements and changes at any time.
* Short-circuit detection
at On pushbutton
M 6800
13
23
33
43 53 63 81
Monitoring
logic
K2
K3
K2
K3
K2
K3
S23
14 24 34 44 54
M6801_b
• According to
- Performance Level (PL) e and category 4 to EN ISO 13849-1
- SIL Claimed Level (SIL CL) 3 to IEC/EN 62061
- Safety Integrity Level (SIL) 3 to IEC/EN 61508
• Output: max. 6 NO, 1 NC contacts or 1 NO contact for AC 250 V
• 1-channel or 2-channel connection
• Line fault detection at On pushbutton
• Feedback circuit X1-X2 for monitoring external contactors
• Integrated short-circuit and overvoltage protection
• LED displays for channels 1 and 2 and supply
• Removable terminal strips
• Wire connection: also 2 x 1.5 mm
• DIN 46 228-1/-2/-3-4 or 2 x 2.5 mm
• Optionally with release delayed NO contact to 10 min
• Optionally automatic On function after connection of operating voltage
or activation via On pushbutton
• Optionally cross fault detection in emergency stop control circuit
• Optionally dual voltage version
• Width 100 mm
Approvals and Markings
* see variants
Applications
Protection of people and machines
• Emergency stop circuits on machines
• Monitoring of safety gates
Indicators
LED power supply:
LED K2:
LED K3:
only at BO 5988/4_ _,
BO 5988/5_ _:
LED KT2, KT3:
K23
64
82
15
stranded ferruled (isolated),
2
stranded ferruled DIN 46 228-1/-2/-3
2
*
Canada / USA
on, when operating voltage present
on, when supply on relay K2
on, when supply on relay K3
on, when delayed contacts are energized
BO 5988 / 22.03.17 en / 846