Meggitt VM600 Hardware Manual

VM600 MPS hardware manual (standard version) MAMPS-HW/E 9 - 39
Edition 17 - February 2018
Slot number coding for IOC4T cards
CONFIGURATION OF MPC4 / IOC4T CARDS
9.9 Slot number coding for IOC4T cards
IOC4T cards use an electronic keying mechanism to help prevent them from being installed
in the wrong slot of a VM600 rack. Each IOC4T card has a bank of micro-switches that are
used to assign a slot number to the card, stored in the slot number (address) assignation
register.
The IOC4T card compares its slot number with the rack’s slot number (see Figure 2-2). The
result of the comparison is displayed on the SLOT ERROR LED on the cards panel:
• If the codes are identical, the LED is green.
• If the codes are not identical, the LED is red.
9.9.1 VM600 system rack (ABE04x)
When an IOC4T card is installed in a VM600 system rack (ABE04x), the micro-switches on
the card must be configured to match the rack slot (slot number) being used (see 2.1.2 Slot
number coding for cards in the rear of an ABE04x rack).
The example in Figure 9-27 shows the micro-switch settings required for an IOC4T card
installed in slot 11 of an ABE04x rack.
Figure 9-27: Micro-switches to assign the IOC4T slot number (ABE04x)
Switches 5 to 8
not used
IOC4T card micro-switch settings for installation in slot 11 of an ABE04x rack
LSB = Least-significant bit
MSB = Most-significant bit
Switch number
Hole
Raised part
of switch
Text etched on PCB
(Top of card)
Connector P4
(To J3)
IOC4T
12345678
ON
ON
1
0
(LSB) (MSB)
(Bottom of card)

Meggitt VM600 Specifications

General

Brand	Meggitt
Model	VM600
Category	Measuring Instruments
Language	English