2 - 6 VM600 MPS hardware manual (standard version) MAMPS-HW/E
Edition 17 - February 2018
Racks
OVERVIEW OF VM600 MPS HARDWARE
NOTE: The wiring of the DC power supply input connector, as shown in “Rear view
(DC version)” of Figure 2-4, is correct and is compatible with earlier versions of the
ABE056 rack.
The equivalent “Rear view” drawing used in some earlier versions of the VM600
MPS hardware manual was incorrect, so it appears that the DC power supply input
connector wiring has changed, but it has not.
2.1.4 Slot number coding for cards in the rear of an ABE056 rack
Most cards installed in the rear of a slimline 19" rack (ABE056) use an electronic keying
mechanism to help ensure that the card is installed in the correct slot (for example, in the slot
directly behind the associated processing card in the front of the rack). See also 2.1.2 Slot
number coding for cards in the rear of an ABE04x rack.
When a card that implement this electronic keying mechanism is to be installed in an ABE056
rack, micro-switches on the backplane of the rack must be configured to match the slot
number configured for the card (Figure 2-5). This allows a card to be used in an ABE056 rack
without reconfiguring its slot number.
Figure 2-5: Micro-switches to assign the slot number (ABE056)
Example showing the setting of micro-switches for slot 11 in an ABE056 rack
LSB = Least-significant bit
MSB = Most-significant bit
Micro-switch number
Hole
Raised part
of switch
Backplane of ABE056
IOC4T connector
IOC4T connector
RLC16 connector
1234
ON
ON
(LSB) (MSB)
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