Arixet FSM103 User manual
STANDARD FSK MODEM FSM103
FSM203
User manual
www.arixet.com
FSM103, FSM203 USER MANUAL
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Content
INTRODUCTION 3
INTERFACES 3
FRONT PANEL 4
POWER KEY 4
LOOP KEY 5
LED INDICATORS 5
CONFIGURATION DIP SWITCHES 6
DIAG PORT 7
REAR PANEL 8
Line / Analog interface 8
RS-232C / Serial data interface 9
Power supply 11
MOUNTING 11
Mounting FSM103 in rack 3U 11
FSM203 Desktop / Din rail mountable 13
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1. INTRODUCTION
FSM104 is a multistandard modem for asynchronous or transparent data
transmission in 300-3400 Hz voice band. For lower baud rates it uses binary frequency
modulation techniques (FSK), which make it highly immune to interference and noise
and permits extensive voice-band communication link utilization.
The modem supports CCITT V.23 and Cegelec 600Bd communication standards.
Table of programmable channels (Figure 1.) depicts possible utilization of audio band in
FSK mode. In FSK mode the modem can operate in half or full-duplex, point-to-point or
point-to-multipoint mode.
Standards
FSK
Transmission
Rate (Bd)
Frequency
Deviation (Hz)
Channel spacing
(bandwidth) Hz
-F (Hz)
F0 (Hz)
+F (Hz)
ITU V.23 /2
1200
± 400
1600
1300
1700
2100
Cegelec 60x
600
±240
960
2520
2760
3000
Figure 1. Table of programmable channels in FSK mode
Modem configuration is performed via dip switches setting available at the front panel.
FSM104 is designed for using in SCADA systems mainly based upon power utility
communication networks. Depending on the selected mode, it can communicate
through specialized, private or leased lines, radio links and power lines (PLC).
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2. INTERFACES
2.1. FRONT PANEL
Figure 2 FSM103 Front panel view (Rack mount version)
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2.1.1. POWER KEY
Is accessible on the front panel and switched input power on and off .
2.1.2. LOOP
KEY
This key has 3 modes:
Digital loop back
In this mod data input from serial port loop back to itself.
Normal operation
In this condition, there is no internal loop and the operation is
normal.
Analog loop back
In this mod data input from analog port loop back to itself.
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2.1.3. LED INDICATORS
Figure 3 FSM103/FSM203 LED Indicators on front panel
PWR PWR LED is ON when modem is power supplied;
LOOP LOOP LED is ON when LOOP KEY is in digital or analog loop mode;
TXD Transmit LED indicates data transmitted on TXD pin of RS-232 interface.
RTS Request to Send LED indicates state of RTS pin of RS-232 interface.
RXD LED Receive LED indicates data received on RXD pin of RS-232 interface.
DCD LED Data Carrier Detect LED indicates the presence of in-channel carrier with
level higher than predefined receive level.
ACTIVE LED A Live indicators
LED B reserve
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2.1.4. CONFIGURATION DIP SWITCHES
Figure 4 FSM103/FSM203 DIP Switches on front panel
These configuration switches provide baud rate, inverse bit, output level and UART setting as
following positions:
Dip switch 1
BAUD RATE
Dip switch 2
BIT INVERSE
OFF
600 bps
OFF
NORMAL
ON
1200 bps
ON
INVERS
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Dip switches 3,4,5
OUTPUT LEVEL OVER 600 Ω
3
4
5
PEAK
RMS
dBV
OFF
OFF
OFF
0.50 V
0.35 Vrms
-6 dBV
OFF
OFF
ON
1.41 V
1 Vrms
3 dBV
OFF
ON
OFF
1.0 V
0.71 Vrms
0 dBV
OFF
ON
ON
0.63 V
0.45 Vrms
-4 dBV
ON
OFF
OFF
0.56 V
0.40 Vrms
-5 dBV
ON
OFF
ON
0.50 V
0.35 Vrms
-6 dBV
ON
ON
OFF
0.36 V
0.25 Vrms
-9 dBV
ON
ON
ON
0.25 V
0.18 Vrms
-12 dBV
Dip switches 6,7,8
UART SETTING
6
7
8
LENGTH
PARITY
STOP BIT
OFF
OFF
OFF
8 BIT
NON
1 OR 2
OFF
OFF
ON
7 BIT
NON
1 OR 2
OFF
ON
OFF
6 BIT
NON
1 OR 2
OFF
ON
ON
5 BIT
NON
1 OR 2
ON
OFF
OFF
8 BIT
O | E
1 OR 2
ON
OFF
ON
7 BIT
O | E
1 OR 2
ON
ON
OFF
6 BIT
O | E
1 OR 2
ON
ON
ON
5 BIT
O | E
1 OR 2
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2.1.5. DIAG PORT
Figure 5 FSM103/FSM203 Diag port on front panel
The RJ45 port for manufacture diagnostics and maintenance and its not applicable for user.
2.2. REAR PANEL
Figure 6 FSM103/FSM203 Rear panel
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2.2.1. Line / Analog interface
Figure 7 Pin configuration on line connector
This connector is a SUB D 15 pin female type connector with screw locking, which provides:
● Interface between 4 wire analog line and the modem
● The fail relay output
TRANSMISSION
PIN 1, 2
RECEPTION
PIN 4, 5
FAULT RELAY
PIN 10, 11
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2.2.2. RS-232C / Serial data interface
The RS-232 serial data interface connector is a D-SUB 9 pin female type connector with screw
locking. It provides the interface between the modem and remote terminal unit or data
processing equipment in data mode. The following table gives the allocation and function of
each pin.
Figure 8 Pin configuration on data connector
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2.2.3. Power supply
Power supply connector is a 2-position screw plug type (for 2-2.5 mm 2 wire) used for
connecting the modem to a DC power supply
certified to IEC 60950-1:2005 + A1:2009 + A2:2013.
For security reasons power supply input includes series 1A fuse and reverse polarity
protection.
So polarity is irrelevant and maximum consumption is 3VA.
Nominal input voltage is 48 VDC and the range is 36 to 60 VDC.
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3. MOUNTING
3.1. Mounting FSM103 in rack 3U
Figure 8 Rack frame 3U/84TE/19” Front view
Figure 9 Rack frame 3U/84TE/19” Rear view
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Figure 10 Rack frame 3U/84TE/19” Side view
Figure 11 FSM103 Card front view Figure 12 FSM103 Card rear view
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3.2. FSM203 Desktop / Din rail mountable
Figure 13 FSM203 Desktop front view and dimensions
Figure 14 FSM203 Desktop rear view
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Figure 15 FSM203 Desktop side view and dimensions
Figure 16 Installing DIN RAIL mounting clamp on FSM203 Desktop
(Right or Left side)
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Figure 17 Installing double DIN RAIL mounting clamps on FSM203
Desktop (Back side)
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