Black Box ME251A-R3, User Manual

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