FTS-3 Fetal Telemetry System Service Manual
Principle Introduction
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（
2
）
Indicative light ports to power module
Figure 7- 4
（
3
）
Indicative light board ports to charge interface board
Figure 7- 5
7.1.3 Charge Interface Board
Charge interface board is the adapter plate of transducer charging and communication and is
responsible for connecting power and communication ports.
Pin No. Symbol
1,2
DC12V
3,4
GND
5
CHARGE_LED
6
POWER_UP
7
POWER_RXD
Pin No. Symbol
1,2,3,4 VCC
5,6,7,8 GND
9,10
TRANS1_TX
11,12
TRANS1_RX
13,14
TRANS2_TX
15,16
TRANS2_RX
17,18
TRANS3_TX
19,20
TRANS3_RX
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