GE Corometrics 170 Series Service Manual page 101

Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Revision C
Theory of Operation: FECG/IUP Board Theory of Operation
Table 5-20. FECG/UA Unisolated Output (P16), Models 173/174 Only
Signal Type
Signal Name (Relative To Main
+12 V (173)
+11.6V (174)
GND
+5V
+7.5V
2.5VREF
IUPEN*
+3.3VANA
144KC
–3.3VANA
AGND
FECGOUT
PRESSOUT
FECGEN*
CLR*
TOCOEN*
US1EN*
* Active low.
170 Series Monitor
2000947-004
Board)
+12 V for FECG Isolated Power Supply
Output
+11.6 V for FECG Isolated Power Supply
Output
Output
Output
Output
Input
Output
Output 144 KHz for Isolated Power Supply
Output
Output
Input
Input
Input
Ultrasound Sync Timing Line
Output
Input
Input
Signal Description
(Model 173 only)
(Model 174 only)
Digital Ground
+5 V Supply
+7.5 V Supply
2.5 V Reference
IUP Enable Output
+3.3 V for Analog
–3.3 V for Analog
Analog Ground
FECG Analog Output
Pressure Analog Output
FECG Enable
(Model 174 only)
TOCO Enable
US1 Mode Enable
(Model 174 only)
5-41