2-24 MAC 1200 resting ECG analysis system Revision D
2012250-095
Functional Description: Interfaces to Peripherals
Electronic Interfaces
RS-232 Interface
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: RS232
Type: 9-pin sub-D, female, Mark II with 4-40 UNC inserts
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.
RS232
Table 2. RS232 Pin Position
Pin Number Signal Input/Output Function Definition
1 NC
2 RXDE Input RS232 Data In
3 TXDE Output RS232 Data Out
4 NC
5 GND Signal Ground
6 V_MODEM Output Modem Supply +8 V MAC1200 US only
7 RTSE Output Request to Send
8 FERNST Input Remote Start Input 0: active
9 NC
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