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20
Installation and Physical Interface
Table 2: Pin Assignment: Simplex (SK/SP Emulation) Parallel Interface (on 25x2 IDE connector) (Continued)
25
/STROBE
26
D5
27
1
GND
28
D6
29
1
GND
30
/HOME
31
1
GND
2
32
DGND
33
2
+5 VDC
34
D7
35
2
+5 VDC
36
2
+5 VDC
37
NC
38
NC
1.
The GND (shield) signal lines should be connected to the common ground.
2.
The power pins are allocated on the assumption of Simplex operation for SK/SP emulation purposes.
These pins should not be used if the user elects to power the unit using the 4x1 power connector.
Table 3: Pin Assignment: Enhanced Parallel Interface (on 25x2 IDE connector)
PIN
SIGNAL
1-8
NC
9
/SOP
10
R/W
11
/RESET
12
RESERVED
13
1
GND
14
2
DGND
15
BUSY
16
D0
/STROBE input, active low: a high to low pulse = read data lines;
a high = ignore state of data lines. This line is internally pulled high
via 10 K ohm resistor to 5 VDC. For the SK emulation the home line
is also read in via the STROBE signal
Data line 5
Shield
Data line 6
Shield
Home input: low sends the switch to the home position in Simplex
(SK emulation) mode (i.e. this acts the same as the /RESET line
defined in the SK/SP manual when the unit is wired as per this table)
Shield
Digital ground, RESERVED FOR SK/SP EMULATION/ Power on
2x25
RESERVED FOR SK/SP EMULATION/ Power on 2x25
Data line 7
RESERVED FOR SK/SP EMULATION/ Power on 2x25
RESERVED FOR SK/SP EMULATION/ Power on 2x25
No connect
No connect
No connect
Start of packet
Read/write
This is a micro controller unit (MCU) reset
For internal use only
Shield
Digital ground, RESERVED FOR SK/SP EMULATION/ Power on
2x25
Busy output: low=idle, high= switching
Data line 0
DESCRIPTION
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