Revision B 120 Series Maternal/Fetal Monitor 4-13
2015590-001
Theory of Operation: Main Motherboard
31 SPARESTAT0 Input NBP Board Present Line—active Low
32 SPARESTAT1 Input
Spare Present Line—active Low
NOTE: These lines also go to the spare slot.
33 GNDBP Output NBP Module Ground
34 GNDBP Output NBP Module Ground
35 +15BP Output +15 Volt Supply for NBP Module
36 +15V Output +15 Volt Analog Supply
37 AGND Output Analog Ground
38 GNDI Output +20 V Ground
39 GNDI Output +20 V Ground
40 RES1/ Output System Power-On Reset Line
41 GND Output Digital Ground
42 D1B I/O Buffered Data Line
43 D3B I/O Buffered Data Line
44 D5B I/O Buffered Data Line
45 D7B I/O Buffered Data Line
46 D9B I/O Buffered Data Line
47 D11B I/O Buffered Data Line
48 +5V Output +5 Volt Logic Supply
49 D13B I/O Buffered Data Line
50 D15B I/O Buffered Data Line
51 A2B Output Buffered Address Line
52 A4B Output Buffered Address Line
53 A6B Output Buffered Address Line
54 A8B Output Buffered Address Line
55 GND Output Digital Ground
56 A10B Output Buffered Address Line
57 A12B Output Buffered Address Line
58 A14B Output Buffered Address Line
59 A16B Output Buffered Address Line
60 SP1B/ Output Spare Chip Select Line
Table 4-6. NBP Board Connector J4 (Continued)
Pin Number Signal Name Signal type Signal Description
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