3.7 Section 4: D/I/O Register
3.7.1 Digital Output/Digital Input
z
I/O address of D/I = wAddrDio
z
I/O address of D/O = wAddrDio
The PCI-1800/1802 provides 16-channel digital input and 16-channel digital output. All
levels are TTL compatible. The connections diagram and block diagram are given below:
CON2
I/O write
signal
I/O read
signal.
DI port
DO port
CON1
Local Data Bus
D0,D1 ... D15
Figure 3-4: DIO block diagram.
The D/I port can be connected to the DB-16P. The DB-16P is a 16-channel isolated digital
input daughter board. The D/O port can be connected to the DB-16R or DB-24PR. The DB-
16R is a 16-channel relay output board. The DB-24R is a 24-channel power relay output board.
PCI-1202/1602/1800/1802 Hardware User’s Manual
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Ver.4.2, Dec/2009, PMH-014-42)---- 62