MSR10RD Datasheet, PDF (1/1 Pages) Allen-Bradley – Tongue Interlocks

Safeguarding Applications
Tongue Interlocks
Trojan 5, MSR10RD, Bulletin 100, PLC, Dual Channel
24V DC
Reset
L1 L2 L3
Guard
Closed
11 21 33 _Trojan
+ ^{A1 S13 S23 X1 13} 23 ^{33 43 53 63 73 83 91 D13 D21}
Interlock
Outputs
Switch
D13-D14
12 22 34
&
Minotaur
D21-D22
MSR10RD
Are
A2 S14 S24 X2 14 24 34 44 54 64 74 84 92
Delayed
D14 D22 _Action
Inputs
PLC
Outputs
Momentary
Push
Button
K1
K2
M
Contact
Protection
e.g. Thermal
Cut Out
Ground
K1
K2
Bulletin 100S
or 700S
Circuit Status
Circuit shown with guard door closed, ready for motor starting (via signals from the PLC).
Operating Principle
The Minotaur MSR10RD immediate action outputs at 13-14 are connected to inputs at the PLC and the delayed outputs at D13-D14 are
connected to the contactor K1. The relevant PLC outputs are connected to contactor K2. If the guard is opened the Minotaur contacts 13-14
immediately signal the PLC to stop the motor. The PLC then has a pre-set time limit (adjustable at the MSR10RD) to execute its shut down
sequence and switch OFF contactor K2. After this time period has elapsed, the delayed action outputs D13-D14 will switch off contactor K1,
thus ensuring isolation even if there is a hardware, program or systematic fault in the PLC.
Fault Detection
If either contactor K1or K2 sticks ON, the motor will stop on command but the Minotaur cannot be reset (thus the fault is revealed to the
operator).
A single fault detected on the Minotaur input and output circuits will result in the lock-out of the system to a safe state (OFF).
All safety critical single faults will be detected at the next opening of the guard.
Comment
This system has the high integrity of hard wiring and allows a correctly sequenced shut-down which protects the machine and program.
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