计流量计算机OMNI6000

Flowrate

FT-101

Cumulative BBLS

FT-101

Total A

000682 009456 023975 Fig. 1-1.Features of the Operator Front Panel

1.3. Passive Backplane Mother Board

Mounted on the passive backplane are DIN standard connectors which are bussed in two sections. The front section is a high performance, 16-bit bus which accepts the Central Processor Module. The Omni 6000 computer has 3other connectors available in this section to accept memory expansion and future product enhancements.

The rear 8-bit I/O bus section comprises 10 connectors on the Omni 6000 and 4on the Omni 3000, which can accept any type of optically isolated I/O module manufactured by Omni. The rearmost connector on both computers accepts the system AC/DC power supply module. Dual ribbon cable assemblies (Omni 6000) and a single ribbon cable (Omni 3000) connect the I/O connectors on the backplane to the back panel terminals. (See Fig. 1-2 below and Fig. 1-3 on facing page.)

INFO - Passive backplane simply means that no active circuitry is contained on it.The active circuitry is contained on the modules that plug into it.

‹ CAUTION! ‹

These units have an integral cabinet latching mechanism which first must be

disengaged by lifting the bezel upwards, before

withdrawing the unit from the

case.

Fig. 1-2.Passive Backplane Motherboard Omni 3000

‹CAUTION!‹

These units have an integral

cabinet latching mechanism

which first must be

disengaged by lifting the

bezel upwards, before

withdrawing the unit from the

case.

Fig. 1-3.Passive Backplane Motherboard Omni 6000

1.4. Back Panel Terminal Module

The AC receptacle of the Omni 6000 and Omni 3000 back panel is a power line filter with a separate AC fuse holder. The AC power is contained on a separate four-conductor cable which plugs into the power supply. The power supply used with this version is a Model 68-6118; no physical fuses (see 1.7. Operating Power ).

1.4.1. Back Panel Terminations

The Omni 6000 terminal blocks are identified TB1 through TB10 with terminals marked 1 through 12 for each block. These provide 120 circuit paths to the passive backplane. The DC terminals are on TB11.

The Omni 3000 terminal blocks are identified as TB1 through TB4, with terminals marked 1 through 12 for each block. These provide 48 circuit paths to the passive backplane. The DC terminal is on TB5.

Back Panel Fuses - All DC fuses are 3 amp fast-blow manufactured by Littlefuse,Model 225.003. All AC fuses are ½ amp slow-blow

manufactured by Littlefuse,Model 229.500.

Fig. 1-4.Back Panel Terminations Omni 6000 and Omni 3000