Tektronix DIO1 Digital Input/Output Module Rev. C User manual
DlOl
Digital Input/Output Module
The DIOl Digital Input/Output Module 1 provides 32 programmable digital inputloutput channels at LS-TTL levels. These channels are grouped into &bit ports, and each
port can be individually programmed for input or output by on-card DIP switches.
Rapid settling times allow sampling of high-speed digital inputs. Outputs are latched to
allow asynchronous reading of the output data.
I/O connections are made to on-card screw terminals, which accept 16-24 gage wire
leads. In addition to the screw terminals, a jack is provided for quick connection and
disconnection of inputs and outputs.
The DIOl module can be installed in any available slot in the system; however, digital
modules should generally be placed in the high-numbered slots if any analog modules
are present in the system. To install the module, remove the baseboard top cover and
insert the module into the desired slot with the component side facing the power
supply.
CAUTION: Always turn off the baseboard power before installling or removing
modules. Replace the top cover and secure it with screws. To avoid the possibility of
EM1 radiation, never operate the system with the top cover removed.
User-Configured Components
User-configured components for the DIOl include the input/ output connections and
the I/O programming DIP switches, as listed in Table 1. Connections can be made
either to screw terminals at the top of the module or to a separate on-card jack, which
allow s the quick connection and disconnection of I/O lines. Input/output programming
of each of the four ports is performed by setting DIP switches located on SlOl. for the
location of these components, refer to Figure 1.
Table 1. User-Configured Components
Component
Screw Terminals
I/O Connector
DIP Switches
Designation Function
J174
Pl.76
Slol
Input Output Signal Connections
Quick Disconnect Signal Connections
Program Ports A-D for InnutlOutout
Document Number: 500-934-01 Rev. C
DIOl-1
GND
+5v
0
1
2
DIOl-2
Figure 1. DlOl Module Configuration
Connections
The screw terminals, which provide one means of making input/ output connections,
are located on J174 across the top edge of the module board. The channel numbers for
the 32 inputs (O-31) are marked on the board and are also shown in Figure 1. Two con-
nections each for module ground (GND) and +5V are also included on the terminal
strip. The terminals are intended for 16-24 gage wire stripped to 3116 of an inch. Typical
input/output connections when using the screw terminals are shown in Figure 2.
DIGITAL DEVICE
pi+
HIGH
Y-l
CAUTION: NON-ISOLATED TTL
CONNECTIONS ONLY
I
Figure 2. Typical DIOI Connections
In situations requiring rapid connection or disconnection of signal lines, P176 can be
used as an alternate method of signal connection. Figure 3 shows the pin diagram for
the mating plug for Pl.76, which is designed for use with a suitable ribbon cable. When
connecting external circuits in this manner, the screw terminals should not be used.
If EMI radiation becomes a problem, use shielded cable for input/ output connections.
Connect the shield to baseboard ground only, and leave the other end of the shield
disconnected. Do not use the shield as a signal carrying lead.
CAUTION: DIOl inputs and outputs are non-isolated, meaning that circuit low is connected to power line ground. Any circuits connected to the module must also be
referenced to power line ground and must not be floating.
DIOl-3
PIN 40
LEFT EDGE
OF MODULE
PIN 2
0
GND
0
CH30
0
CH28
0
CH26
0
CH24
0
GND
0
CH22
0
CH20
0
CH18
0
CH16
0
GND
0
CH14
0
CH12
0
CHIO
0
CH8
0
GND
0
CH6
0
CH4
0
CH2
0
CHO
0
CH31
0
CH29
0
CH27
0
CH25
0
+5v
0
CH23
0
CH21
0
CH19
0
CH17
0
+5v
0
CH15
0
CH13
0
CHll
0
CH9
0
+ 5v
0
CH7
0
CH5
0
CH3
0
CHl
0
+5v
PIN 39
PIN 1
DIOl-4
Figure 3. Connector Terminal Configuration
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