model
Ⅲ
supports 220VAC power supply
input. Power supply input range:
100~240VAC/DC.
Note:
Power ON operation: first insert the power supply
terminal block into the device power supply interface,
and then plug
the power supply plug contact.
Power OFF operation: first unpin the power plug, then
remove the terminal block wiring part; please note the
operation order above.
【
Serial Port
】
RS-232 serial port
Model
Ⅱ
provides 1 RS-232 serial port and
adopts DB9 female. The pin definition as
follows:
Pin
2
3
5
RS-232
OUT
IN
GND
RS-485/422 serial port
Model
Ⅲ
provides 1 RS-485/422 serial port
and adopts 5-pin terminal blocks. The pin
definition as follows:
Pin
1
2
3
4
5
RS-485
GND
-
-
D+
D-
RS-422
GND
R-
R+
T+
T-
RS-232/485/422 serial port
Model
Ⅰ
provides 1 RS-232 or
RS-485/422 serial port and adopts 8-pin
terminal blocks. The pin definition as
follows:
Pin
1
2 3
4
5
6
7
8
RS-232
-
-
-
-
-
GND IN OUT
RS-485
D+
D- -
-
GND -
-
-
RS-422
T+
T- R+ R- GND -
-
-
【
Checking LED Indicator
】
The device provides LED indicators to monitor the device
working status with a comprehensive simplified
troubleshooting; the function of each LED is described in the
table as below:
LED State
Description
PWR
ON
The device is powered on normally
OFF
The device is not powered on or in
abnormal condition
RXD
ON
The fiber port is in abnormal
condition or disconnected
Blinking
The fiber port is receiving data
OFF
No data receiving in fiber port
TXD
Blinking
The fiber port is transmitting data
OFF
No data transmission in fiber port
【
Specification
】
Standard
Standard
EIA RS-232, RS-485, RS-422
Interface
RS-232
DB9 female
RS-485/422
5-pin terminal blocks
RS-232/485/422
RS-232 or RS-485/422 serial
port, 8-pin terminal blocks
Fiber port
SC/FC/ST interface optional
Indicator
Power supply indicator, fiber port
data receiving and alarm
indicator, fiber port data sending
indicator
Power Supply
Input power supply
Model
Ⅰ
:
External power supply:
12~48VDC
Model
Ⅱ
, Model
Ⅲ
:
External power supply: 5VDC
Built-in power supply: -48VDC or
220VAC
Access terminal
DC round-head, terminal block
or three hole socket
Environmental Limits
Temperature range
Model
Ⅰ
:
Operating temperature: -40~75
℃
Storage temperature: -40~75
℃
Model
Ⅱ
, Model
Ⅲ
:
Operating temperature: -10~60
℃
Storage temperature: -40~85
℃
Operating humidity
5%~95% (no condensation)
【
Typical Application
】
Fiber modem can extend the transmission distance of serial
signal over fibers, which should be used in pairs. The device
supports three types of serial port, RS-232/485/422. Users
can choose one of them to connect local terminal and remote
terminal. Two or three different types of serial ports are not
supported at the same time.
When connecting local and remote fiber ports, please
configure the parameters of fiber ports at both ends in the
same way, such as Transmit/Receive wavelength,
transmission distance, fiber type and so on.
The pin connection modes of each type of serial port are as
shown in the picture below.
