Safety Relays
Two Hand Relays
Minotaur MSR7R & MSR7C
Specifications
Standards
EN574, EN954-1, ISO13849-1,
IEC/EN60204-1, IEC60947-5-1,
ANSI B11.19, AS4024.1
Category
Approvals
Cat. 3 per EN 954-1 (ISO 13849-1)
Cat. IIIb per EN 574
C-Tick, CE marked for all
applicable directives, cULus & TÜV
Power Supply
24V AC/DC, 110V AC or 230V AC
Power Consumption
Safety Inputs
<4VA
1 N.C & 1 N.O.
Input Simultaneity
Maximum Input Resistance
Reset
0.5s
500 W
Automatic
Description
Outputs
3 N.O. Safety; 1 N.C. Auxiliary
The Allen-Bradley Guardmaster Minotaur MSR7R & MSR7C are logic
units for monitoring and interfacing two hand control devices with a
safety related circuit. The MSR7R is for use with mechanical
switches and the Allen-Bradley Bulletin 800Z Zero Force Touch
Buttons. The MSR7C is for use with electronic-sensing (for example,
capacitive or photoelectric) palm buttons because the MSR7C will
not turn its output ON if a power interruption occurs while a
person’s hands are on the buttons.
➊ Output Utilization per IEC
B300, AC-15
4A/250V AC, 4A/125V AC
P300, DC-13; 2A/24V DC
60947-5-1 (Inductive)
Thermal Current (non switching) 4A
Fuses Input (Internal,
replace.)
Output (external)
500mA time lag
5A quick acting
Min. Switched Current/Voltage
Maximum Dropout Time
Indication LEDs
10mA/10V
50ms
The MSR7 has 3 N.O. safety outputs and 1 N.C. auxiliary output.
The safety outputs have independent and redundant internal
contacts to help ensure the safety function. The auxiliary contact is a
nonsafety output intended to provide an external signal about the
status of the safety outputs.
Red = Power On
Green = K1Closed
Green = K2 Closed
Impulse Withstand Voltage
Installation Group
Pollution Degree
2500V
The MSR7 requires the two switches to be operated within
C in accordance with VDE 0110
3
0.5 seconds of each other and will only authorize the ON state while
both switches are held down. If one of the switches is released, the
output goes to the OFF state and the machine cannot be restarted
until both buttons are released and then operated simultaneously.
Operating Temperature
Humidity
-10°C to +55°C (+14°F to +131°F)
90% RH
Enclosure Protection
Terminal Protection
Conductor Size
IP40, (NEMA 1), DIN 0470
IP20, DIN 0470
The MSR7 conforms to EN574 which gives specific requirements
for two hand control units and logic devices. Categories IIIB or IIIC
are achieved depending upon the wiring.
2
1 x 2.5mm (14AWG) stranded,
2
1 x 4mm (12AWG) solid
Features
Torque Settings—terminal
screws
1N m (8.85lb in)
•
•
•
•
•
•
Safety category 3 per EN 954-1
Safety category IIIb per EN 574
Two-hand control unit
Case Material
Mounting
Red Polycarbonate
35mm DIN rail
510g (1.12lbs)
3 N.O. safety outputs
Weight
1 N.C. auxiliary output
45mm wide housing
Electrical Life
220V AC/4A/880VA cosϕ=0.35 100,000 operations
500,000 operations
1,000,000 operations
2,000,000 operations
220V AC/1.7A/375VA cosϕ=0.6
30V DC/2A/60W
Applications
Shown with
Mechanical
two hand push
button station
or two
10V DC/0.01A/0.1W
Contactor monitoring circuit
Contactor switching circuit
Mechanical Life
Vibration
Shock
2,000,000 operations
Supply inclusive of switching
circuit
Contactor
0.75mm (0.30in) peak, 10-55Hz
30g, 11ms half sine
MSR7R/MSR7C
capacitive
switches
Monitored by Minotaur
➊ See Output Ratings on page 1-29 for details. Consult factory for ratings not
shown.
The safety function is ensured by the Minotaur.
Contactors:
Switch Circuit:
MSR7R monitors for
single fault that may
cause a danger.
Provides contactor
monitoring if two or
more contactors are
used in series.
MSR7R monitors itself for any fault.
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