Delta Tau PMAC Pack, Hardware Reference Manual

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PMAC-Pack
74 PMACPack Mating and Connectors
Table 6-12. JTHW 26-Pin Connector
JTHW 26-Pin Connector
Front View
Pin# Symbol Function Description Notes
1 GND COMMON PMAC Common
2 DAT0 INPUT Data-0 Input Data input from
thumbwheel switches
3 DAT1 INPUT Data-1 Input Data input from
thumbwheel switches
4 DAT2 INPUT Data-2 Input Data input from
thumbwheel switches
5 DAT3 INPUT Data-3 Input Data input from
thumbwheel switches
6 DAT4 INPUT Data-4 Input Data input from
thumbwheel switches
7 DAT5 INPUT Data-5 Input Data input from
thumbwheel switches
8 DAT6 INPUT Data-6 Input Data input from
thumbwheel switches
9 DAT7 INPUT Data-7 Input Data input from
thumbwheel switches
10 NC NC No Connection
11 BRLD/ OUTPUT Buffer Request Low is "buffer req."
12 IPLD/ OUTPUT In Position Low is "in position"
13 +5V OUTPUT +5Vdc Supply Power supply out
14 GND COMMON PMAC Common
15 SEL0 OUTPUT Select-0 Output Scanner output for
reading TW switches
16 SEL1 OUTPUT Select-1 Output Scanner output for
reading TW switches
17 SEL2 OUTPUT Select-2 Output Scanner output for
reading TW switches
18 SEL3 OUTPUT Select-3 Output Scanner output for
reading TW switches
19 SEL4 OUTPUT Select-4 Output Scanner output for
reading TW switches
20 SEL5 OUTPUT Select-5 Output Scanner output for
reading TW switches
21 SEL6 OUTPUT Select-6 Output Scanner output for
reading TW switches
22 SEL7 OUTPUT SELECT-7 OUTPUT Scanner output for
reading TW switches
23 GND COMMON PMAC Common
24 GND COMMON PMAC Common
25 GND COMMON PMAC Common
The JTHW connector provides 8 inputs and 8 outputs at TTL levels; these are dedicated to reading BCD
thumb wheel switches. Two thumb wheels may be read by direct connection to J3, more thumb wheels, up
to 512 switches, may be read using the ACC-18 (Thumb wheel Multiplexer). J3's inputs and outputs may be
used as general purpose multiplexed TTL I/O, if thumb wheels are not used.