Model277
RS-232/485/422 to Fiber Converter
(SM & MM)
Introduction:
Model277 is one kind can offer RS-232/485/422 serial port carry
transparent optic fiber modem of transmission to get end to user, no
need patch cords set up, switch over automatically, and can detect
and examine the signal speed automatically, zero delays time to
transmit automatically. Model277 adopt optic fiber transmit, have
isolate protection, data privacy is fine, working steady, data, such
threats to communication equipment as the wave is welled up and
interfered with electromagnetically that the effective one has
prevented the abominable environment from being struck by
lightning, can work in the abominable and dangerous environment
reliably.
Can be used in occasions such as various industrial control, course
controlling, traffic controlling and intellectual district , especially suit
the bank, electricity and interfering with environment department
and system with the special requirement electromagnetically.
Packing List:
Model277 is shipped with following items.
1. Model277
×
1
2. User manual
×
1
Features:
1. Extend RS232/485/422 transmission
up to 120km with single-mode(SM)
up to 2km with multi-mode(MM)
2.Transmit asynchronously, point-to-point to use, speed reach
500Kbps
3. 600W surge protection, 1500W surge protection
4. Examine signal speed automatically, zero delay time
5. Plug-and-Play (Device is hot-pluggable, Data format Auto-sensing
& Self-adjusting)
6.Only one RS232/RS485/RS422 port can be connected at a given
time.
7. 9~36VDC power supply Input(2 bit terminal block)
Pinout Configuration:
Power, RS-232/485/422
RS-232/485/422 interface adopt 8 bit terminal block, the power
supply input is 2 bit terminal block.
Power:
DCIN
9~36VDC input
GND
power ground
RS-485/422:
T+/D+
RS-422 send+/485+(A)
T-/D-
RS-422 send-/485-(B)
R+
RS-422
R-
RS-422 receive-
GND
Signal ground
RS-232:
GND
Signal ground
IN
RS232 input (RXD)
OUT
RS232 output (TXD)
Optical fiber interface
Optic fiber interface need use in pairs, OUT port is fiber send side,
connect another long-range light of interface fiber receive end IN ;
IN port is fiber receive side , connect long-range same fiber send
side :
Optic fibers spent both ends mark the label (the following picture
show: A-A, B-B, can also mark another: A1-A2, B1-B2), in order to
use.
NOTE:
SC, ST or FC, for optic fiber interface, SM is look the
same to MM for form. For example,Model277SM/SC,the optic
fiber interface(SC) is look the same to Model277MM/SC.
LED indications:
Specifications:
Standards: EIA RS-232C, RS-485, RS422 standard
Transfer rate: 300~500Kbps, auto test serial signal rate detect signal
Power
Green, Power supply indication
On: power joined; Off: no power connect
RxD
Green light, optic fiber interface receive
data point out and concurrently mere port
report an emergency and ask for help or
increased vigilance, on: There are data that
are received; Off: Have data receive
TxD
Green light, optic fiber interface send
datum instruct
On: Have data send; Off: no data send
