Pin Assignments; Direct Hardware Control; Reading The Inputs (Direct); Register Description - SeaLevel ISO-16.PCI User Manual

Pin Assignments

Note: For ease in wiring, the card's DB37 connector can be interfaced directly to Sealevel's terminal block kit,
Part# KT-101. The KT-101 kit, consisting of a 6 ft. M/F cable and screw terminal block provides a simple means to
connect field wiring to Sealevel 37-pin I/O cards. The Sealevel Terminal Block provides both male and female DB-
37 connectors eliminating the need for gender benders and other adapters while simplifying cable connections.

Direct Hardware Control

In systems where the users program has direct access to the hardware (DOS) the table below gives the mapping and
functions that the ISO-16.PCI provide. The address of each eight-bit port is calculated as shown in the table on the
following page, the cards base address plus an offset.

Reading the Inputs (direct) :

The inputs are active Low. If no voltage is applied across one of the differential inputs it returns a one on that bit.
If an AC or DC voltage (of sufficient magnitude, covered above) is applied it returns a zero on that bit.
R = Read

Register Description

Address Mode
R/W
Base+0
R/W
Base+1
Base+2 R
Base+3 R
Base+4 R
Base+5 R/W
Base+6 R
Base+7 R
Sealevel Systems ISO-16.PCI
Port A Bit
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
Ground
+ 12 Volts
+ 5 Volts
Function Available
R
R
D7 D6 D5
PAD7 PAD6 PAD5
PBD7 PBD6 PBD5
{0} {0} {0}
{0} {0} {0}
{0} {0} {0}
IRQEN IRQST {0}
{0} {0} {0}
{0} {0} {0}
P1
18,37
17,36
16,35
15,34
14,33
13,32
12,31
11,30
10,29
9, 28
8,27
7,26
6,25
5,24
4,23
3,22
2,20,21
19
1
Port Address Hex
A Base + 0
B Base + 1
D4 D3
PAD4 PAD3
PBD4 PBD3
{0} {0}
{0} {0}
{0} {0}
{0} {0}
{0} {0}
{0} {0}
Technical Description
D2 D1 D0
PAD2 PAD1 PAD0
PBD2 PBD1 PBD0
{0} {0} {0}
{0} {0} {0}
{0} {0} {0}
{0} IRC1 IRC0
{0} {0} {0}
{0} {0} {0}
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