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Port 1
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Port 2
{
Port 3
{
Port 4
Figure 1-1. Ports on the HP E2261A Quad RS-232 Port M-Module
Table 1-1. HP E2261A Quad RS-232 Port M-Module Connector Pin Definitions
HP E2261A Quad RS-232 M-Module
Pin Name and Function
DTR
Data Terminal Ready
TD
Transmitted Data
RD
Received Data
RTS
Request to Send
CTS
Clear to Send
DSR
Data Set Ready
SG
Signal Ground
Chassis Connection
a. If you use a shielded cable, connect the shield to a chassis connector pin on the 44-pin
connector. Do not connect the other end of the shield.
Port 1
Port 2
Pin #s
Pin #s
1
5
2
6
3
7
16
20
17
21
18
22
4, 8, 12, 19, 23, 27
a
31, 32, 33, . . . 43, 44
Port 3
Port 4
Pin #s
Pin #s
Connector Pin #
9
13
10
14
11
15
24
28
25
29
26
30
9-Pin (Male)
4
3
2
7
8
6
5
-
Getting Started
15
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