IOCOMM User and Administration Guide

 Introduction | Set-up | Configuration | Bootstrap | Indicators | Troubleshooting | Event Logging (syslog) | Exception Display | iocommd | Command Line Interface | Connectors and Cabling | Technical Specification | Glossary of Terms | Accessories

Connectors and Cabling

Connectors

Pin Assignments

Cabling - Asynchronous Ports

Extension Cabling - Synchronous Port (B)

 

This section defines the connectors on the unit and describes the cables required for problem free operation.

Connectors

The rear panel provides the following connectors:.


Rear Panel.


Key
Name
Type
Function

1

Serial ports 9-16
RJ45

Asynchronous device connection (RS-232)
2

Serial ports 1-8
RJ45

Asynchronous device connection (RS-232)
3

Serial Port A
RJ45

Console, or dial access (RS-232)
4

Serial Port B
DB26

Synchronous, or dial access V.35, X.21 or RS-232
5

AUI
DB15

Ethernet LAN connection
6

10BASE2
BNC

Ethernet LAN connection
7

10BASE-T
RJ45

Ethernet LAN connection
8

Power connector
IEC

Power input

Rear Panel Connector Functions.

 

Pin Assignments

Serial ports 1-16, Serial port A.


RJ45 Connector.

These ports are wired as a DTE.

Pin
Description
V.24
Direction

1

Data Carrier Detect
109
Input
2

Request To Send
105
Output
3

Data Set Ready
107
Input
4

Transmit Data
103
Output
5

Receive Data
104
Input
6

Signal Ground
102
Ref
7

Clear To Send
106
Input
8

Data Terminal Ready
108
Output

RJ45 Pinout.

 

Port B

Port B supports synchronous and asynchronous operation and X.21, V.35 and RS-232 physical interface standards. The physical interface presented will depend on the adapter cable purchased for Port B.

V.35

The V.35 adapter cable (Chase part no. 04 011170) provides a DTE interface.

V.35 MRAC Male Connector.


Pin
Description
Type
Direction

A

Shield Ground
-
-
B

Signal Ground
-
-
C

Request To Send
V28
Output
D

Clear To Send
V28
Input
E

Data Set Ready
V28
Input
F

Data Carrier Detect
V28
Input
H

Data Terminal Ready
V28
Output
P

Transmit Data +
V11
Output
R

Received Data +
V11
Input
S

Transmit Data -
V11
Output
T

Receive Data -
V11
Input
V

Receive Clock +
V11
Input
X

Receive Clock -
V11
Input
Y

Transmit Clock +
V11
Input
AA / a

Transmit Clock -
V11
Input

MRAC - V.35 Pinout.

X.21

The X.21 adapter cable (Chase part no. 04 011180) provides a DTE interface.


DB15 Male Connector.


Pin
Description
Direction

1

Shield Ground
Ref
2

Transmit Data +
Ouput
3

Control +
Ouput
4

Receive Data +
Input
5

Indicate +
Input
6

Clock +
Input
8

Signal Ground
Ref
9

Transmit Data -
Output
10

Control -
Output
11

Receive Data -
Input
12

Indicate -
Input
13

Clock -
Input

DB15 - X.21 Pinout.

V.24 (RS-232)

The V.24 adapter cable (Chase part no. 04 011130) provides a DTE interface and when used in synchronous mode is only suitable for speeds of up to 56kbps.


DB25 Male Connector.

 

Pin
Description
Direction

1

Shield Ground
Ref
2

Transmit Data
Output
3

Receive Data
Input
4

Request To Send
Output
5

Clear To Send
Input
6

Data Set Ready
Input
7

Signal Ground
Ref
8

Data Carrier Detect
Input
15

Transmit Clock
Input
17

Receive Clock
Input
20

Data Terminal Ready
Output

DB25 - V.24 (Synchronous) Pinout.

 

 

Cabling - Asynchronous Ports

Any cable used should be shielded to comply with FCC requirements. Ensure that RS-232 cables are not run near fluorescent lighting or electric motors.

Maximum cable length for RS-232 is specified at 60 metres (200 feet) but is proportional to baud rates - the higher the baud rate, the shorter the cable should be. In general, a 19200 bps connection should not be used on cables in excess of 15 metres (50 feet), whereas a 9600 bps signal operates reliably up to a distance of approximately 30 metres (100 feet). Cables of greater lengths could appear to work correctly, but the connection may be unreliable.

Modem Cables


IOCOMM Serial Port Standard Modem Cable (except Port B).

 


IOCOMM Port B Standard Asynchronous Modem Cable.

 


Printer / Terminal Cables


IOCOMM toTerminal (Software Flow Control).

 


IOCOMM to Terminal (Hardware Flow Control).

 


IOCOMM to Printer Cable (typical).

 


IOCOMM Port B to Terminal (Software Flow Control).

 


IOCOMM Port B to Terminal (Hardware Flow Control).

 

 

Extension Cabling - Synchronous Port B

Port B adapter cables will connect to DCE equipment.

The following cables may be used to extend the reach of the adapter cables.

X.21



Extension cable from IOCOMM Port B adapter cable to X.21 DCE (e.g. LTU or DSU/CSU).

 

V.35


Extension cable from IOCOMM Port B adapter cable to V.35 DCE (e.g. LTU or DSU/CSU).

 

V.24 (RS-232) Asynchronous


Extension cable from IOCOMM Port B adapter cabe to V.24 (RS-232) DCE.

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 Introduction | Set-up | Configuration | Bootstrap | Indicators | Troubleshooting | Event Logging (syslog) | Exception Display | iocommd | Command Line Interface | Connectors and Cabling | Technical Specification | Glossary of Terms | Accessories