Electronic Interfaces - GE MAC 1200 Service Manual

Electronic Interfaces

RS-232 Interface
RS232
Pin Number Signal
1 NC
2 RXDE
3 TXDE
4 NC
5 GND
6 V_MODEM
7 RTSE
8 FERNST
9 NC
2-24
Functional Description: Interfaces to Peripherals
The 9-pin sub-D Connector of the RS-232 interface is implemented on the PCB
Control CS_CI directly.
From Version V1.1, the remote start input pin is available on pin 8.
In MAC1200 US devices the modem supply output +8 V is available on pin 6
additionally.
Connector denotation:
Type:
The function of the individual pins is given in the table below. The definition as an
input/output is seen with reference to PCB Control CS_CI.
Table 2. RS232 Pin Position
Input/Output
Input RS232 Data In
Output RS232 Data Out
Signal Ground
Output Modem Supply +8 V
Output Request to Send
Input Remote Start Input
MAC 1200 resting ECG analysis system
2012250-095
RS232
9-pin sub-D, female, Mark II with 4-40 UNC inserts
Function
MAC1200 US only
0: active
Definition
Revision D