Meggitt vibro-meter VM600 - Page 40

HARDWARE MANUAL Document reference MAMPS-HW/E
VM600 machinery protection system (MPS) Edition 18 - March 2022
2-4
Racks
OVERVIEW OF VM600 MPS HARDWARE
Figure 2-2: Electronic keying circuitry
Micro-switches
(Example: 1011 for slot 11)
Example: Code = 1011 (for slot 11)
Address
decoder
Slot number
(address)
assignation
register
LSB = Least-significant bit
MSB = Most-significant bit
Card in the front of the rack
(for example, MPC4 or AMC8)
ABE04x or ABE056
Card in the rear of the rack
(for example, IOC4T, IOC8T or IRC4)
Figure 2-3: Slot number comparator and SLOT ERROR LED
Slot number (address)
assignation register
(configured on the card)
Slot number
(coded on the rack backplane)
Slot number
comparator
SLOT ERROR LED
on panel of card
(1) A = B:
LED is green.
(2) A ≠ B:
LED is red.
(4 bits) (4 bits)