Revision B 120 Series Maternal/Fetal Monitor 4-17
2015590-001
Theory of Operation: Main Motherboard
61 SP3B/ Output Spare Chip Select Line
62 +5V Output +5 Volt Logic Supply
63 LDSB/ Output Processor Lower Data Strobe
64 R/WB/ Output Processor Read/Write Line
65 AGND Output Analog Ground
66 DTACK/ I/O Processor DTACK Transfer Line
67 No Connection — —
68 No Connection — —
69 CKC Output 20 MHz Clock
70 GND Output Digital Ground
71 No Connection — —
72 No Connection — —
73 No Connection — —
74 No Connection — —
75 GND Output Digital Ground
76 –15V Output –15 Volt Analog Supply
77 AGND Output Analog Supply
78 TECG Input Telemetry ECG
79 TOCO Input TOCO-Telemetry
80 RESB/ Output Processor Controlled Reset Line RESB/
Table 4-7. Communications Board Connector J5 (Continued)
Pin Number Signal Name Signal Type Signal Description
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