Comtrol RocketPort Serial Hub - Manual (Page 5)

Building an RJ45 to DB25 Cable 5 of 6
Building an RJ45 to DB25 Cable
Use the following figures if you need information about
building a general-purpose DTE-to-DTE null modem
cable or a DTE-to-DCE modem cable.
DTE-to-DCE Modem Cable*
General-Purpose DTE-to-DTE Null Modem Cable
Hardware Specifications
This table illustrates environmental conditions.
The following table lists electromagnetic compliance
certifications.
The following table illustrates hardware specifications.
Environmental Conditions Value
Air temperature:
System on
System off 0 to 40
o
C
-20 to 85
o
C
Altitude 0 to 10,000 feet
Heat output:
4-Port
8-Port 17.1 BTU/Hr
20.5 BTU/Hr
Humidity (non-condensing):
System on
System off 8% to 80%
20% to 80%
Mean Time between Failures:
4-Port
8-Port 27.2 years
24.5 years
Modem Cable
RJ45
Pin
1
2
3
4
5
6
7
8
Signal
RTS
DTR
GND
TxD
RxD
DCD
DSR
CTS
DB25
Pin
4
20
7
2
3
8
6
5
Signal
RTS
DTR
GND
TxD
RxD
DCD
DSR
CTS
* Can be ordered from Comtrol.
RJ45
Pin
4
5
1
8
7
6
2
3
Signal
TxD
RxD
RTS
CTS
DSR
DCD
DTR
SGND
DB25
Pin
2
3
4
5
20
8
6
7
Signal
TxD
RxD
RTS
CTS
DTR
DCD
DSR
SGND
Electromagnetic
Compliances
Status
Emission:
Canadian EMC requirements
CISPR-22/EN55022 Class A
FCC Part 15 Class A
Yes
Immunity:
EN50082 (801-2 ESD , 801-3 RF,
and 801-4 FT)
Yes
Safety:
EN60950
UL Listed Yes
Topic
Hardware
Specifications
Baud rate (maximum) 230.4 Kbps
Current consumption:
4-Port
8-Port 42 mA (at 120 VAC)
50 mA (at 120 VAC)
Dimensions
4-port
8-port 6” x 9” x 1.5”
6” x 9” x 2.4”
Driver Control:
Data bits
Parity
Stop bits 7 or 8
Odd, Even, None
1 or 2
Ethernet host interface 10Base-T (10 Mbps)
Hubs per server
Dependent on OS. See the
software documentation.
Line frequency 50 - 60 Hz
Line voltage 100 - 240 VAC
Number of ports 4 or 8
Power consumption:
4-Port
8-Port 5.0 W
6.0 W
Weight 1 lb 4 oz