Description：
The Discrete Input/Output (PDIO) pack provides the electrical interface betweenone or two I/O Ethernet networks and a discrete inputoutput terminal board. Thepack contains a processor board common to all Mark* Vle distributed I/O packsand an acquisition board specific to the discrete input output function. The packaccepts up to 24 contact inputs, controls up to 12 relay outputs, and receivesterminal board specific feedback signals. The associated terminal boarddetermines voltage capability of PDIO. System input to the pack is through dualRJ45 Ethernet connectors and a three-pin power input. Discrete signalinput/output is through a DC-62 connector that connects directly with theassociated terminal board connector. Visual diagnostics are provided throughindicator LEDs. and local diagnostic seral communications are possible throughan infrared port.
PDIO is the functional equivalent of a PDIA and PDOA I/O pack combined intoa single assembly. For simplex applications, it goes on a TDBS terminal boardthat is the equivalent of a SRLY relay terminal board combined with a STCIcontact input terminal board. For TMR applications, it goes on a TDBT terminalboard that, with the WROB option, provides the equivalent of a TRLYH1B relayterminal board combined with a TBCI contact input terminal board.
PDIOH1A is compatible with two types of discrete contact input/output terminalboards: TDBS for single PDIO applications and TDBT for TMR PDIO applications.The relay output portion of the terminal board accepts option cards as described laterin this document. The following table gives details of the compatibility.
Control mode refers to the number of i/O packs used in a signal path:
Simplex uses one I/O pack with one or two network connections.
TMR uses three I/O packs with one network connection on each

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F8650X

F8641
F8640
F8621/A
F8620/11
F8620
F7553
F7133
F7131
F7130
F7126
F7105A
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