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Synchronous Modem Eliminator (SME-4M)
6. RS-232 Interface Pinning
PIN
CIRCUIT
1
AA
2
BA
3
bb
4
CA
5
CB
6
CC
7
AB
8
CF
9
—
10
—
11
—
12
SCF
13
SCB
14
SBA
15
DB
16
SBB
17
DD
14
Table 6-1 RS-232 Interface Pinning
DESCRIPTION
Protective Ground
Transmitted Data
Receive Data
Request To Send
Clear To Send
Data Set Ready
Signal Ground
Data Carrier Detect
+ DC Test Voltage
- DC Test Voltage
Unassigned
Secondary Data
Carrier Detect
Secondary Clear
To Send
Secondary Transmit
Data
Transmit Signal
Element Timing (DCE)
Secondary Receive
Data
Receiver Signal
Element Timing
SIGNAL TYPE
Ground
—
Data
To DCE
Data
From DCE
Control
To DCE
Control
From DCE
Control
From DCE
Ground
Control
From DCE
—
—
—
—
—
—
Control
From DCE
Control
From DCE
Data
To DCE
Timing
From DCE
Data
From DCE
Timing
From DCE
DIRECTION
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