Revision C 170 Series Monitor 5-15
2000947-004
Theory of Operation: Functional Overview
* Active low.
Table 5-16. FECG/UA Option Interface Part One (J16), Models 173/174 Only
Pin Number Signal Name
Signal Type
(Relative To Main
Board)
Signal Description
1 +12V Output +12 V for FECG Isolated Power Supply
2 GND Output +12 V Ground
3 +5V Output +5 V Supply
4 +7.5V Output +7.5 V Supply
5 2.5VREF Output 2.5 V Reference
6 IUPEN* Input IUP Enable Output
7 +3.3VANA Output +3.3 V for Analog
8 144KC Output 144 KHz for Isolated Power Supply
9 –3.3VANA Output –3.3 V for Analog
10 AGND Output Analog Ground
11 FECGOUT Input FECG Analog Output
12 PRESSOUT Input Pressure Analog Output
13 FECGEN* Input FECG Enable (Active Low)
14 NC (171/172/173)
CLEAR* (174)
—
Output
No Connection (171/172/173)
Clear (Model 174)
15 TOCOEN* Input TOCO Enable
16 NC — No Connection
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