socomec RS232 User manual

MODEM
RS232 <=> RTC<=> RS485
Operating instructions
GB
SOCOMEC GROUP SWITCHING PROTECTION & UPS
MAKE YOUR BUSINESS SAFE

GENERAL INFORMATION _________________________3
Safety _________________________________________3
Maintenance____________________________________3
INTRODUCTION__________________________________4
Description _____________________________________4
Characteristics __________________________________4
APPROVALS AND CONFORMITY___________________5
FCC Part 15.105 Notice__________________________5
Declaration of conformity _________________________6
SPECIFICATIONS_________________________________7
Type tests and environmental conditions ____________7
Interface specifications ___________________________9
INSTALLATION __________________________________14
Connections___________________________________14
LED indicators _________________________________15
DIP-switch settings _____________________________16
RS485 general device __________________________20
Termination recommendations ___________________20
Mounting / Removal_____________________________21
PROGRAMMATION ______________________________22
Remote configuration ___________________________22
Generic I / O ___________________________________23
Configuration __________________________________24
AT-commands _________________________________28
APPLICATION EXAMPLE _________________________33
Contents
GB

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SOCOMEC - Réf. : 874 669 A GB
RS232 <=> RTC<=> RS485
Modem
GENERAL INFORMATION
BEFORE INSTALLATION
Read this manual completely and gather all information
on the unit. Make sure that you understand it fully. Check
that your application does not exceed the safe operating
specifications for this unit.
This unit should only be installed by qualified personnel.
This unit should be built-in to an apparatus cabinet, or
similar, where access is restricted to service personnel
only.
The power supply wiring must be sufficiently fused, and
if necessary it must be possible to disconnect manually
from the power supply. Ensure compliance to national
installation regulations.
This unit uses convection cooling. To avoid obstructing
the airflow around the unit, follow the spacing recom-
mendations (see Cooling section).
This modem is for restricted access area use
only.
BEFORE MOUNTING, USING OR REMOVING THIS UNIT
Prevent access to hazardous voltage by disconnecting
the unit from power supply. Do not open connected unit. Hazardous
voltage may occur within this unit when
connected to power supply or TNV circuits.
CARE RECOMMENDATIONS
Follow the care recommendations below to maintain full
operation of unit and to fulfil the warranty obligations.
This unit must not be operating with removed covers or
lids.
Do not attempt to disassemble the unit. There are no
user serviceable parts inside.
Do not drop, knock or shake the unit, rough handling
above the specification may cause damage to internal
circuit boards.
Do not use harsh chemicals, cleaning solvents or strong
detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent
proper operation.
Do not expose the unit to any kind of liquids (rain,
beverages, etc). The unit is not waterproof.
Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connec-
tors as well as other mechanical part may be damaged.
If the unit is not working properly, contact the place of
purchase, nearest Socomec distributor office or Socomec
Tech support.
Maintenance
No maintenance is required, as long as the unit is used
as intended within the specified conditions.
Safety

RS232 <=> RTC<=> RS485
Modem
4SOCOMEC - Réf. : 874 669 A GB
INTRODUCTION
The modem RS232 <=> RTC <=> RS485 is designed to
satisfy industry’s demands on reliability and functiona-
lity in environments with high levels of interference. It has
an RS232 interface and works as a calling / answering
modem on 2-wire Leased Lines. The product can use
4-wire Leased Lines. It can handle rates up to
115.2 kbit/ s on the terminal side and up to 33.6 kbit/ s on
the line side.
Specific parameters can also be set in hardware using
DIP-switches.
The modem is equipped with transient protection on the
line side and a “watchdog” that monitors and automa-
tically resets the modem in the event of a fault. These
functions together with the possibility for remote confi-
guration makes the modem perfect for installation at
unmanned sites and prevents the need of costly service
trips.
The modem also has password protection and dial-back
security to ensure that only authorised users can commu-
nicate with the modem.
The modem is intended for mounting on a 35 mm DIN-
rail, where the modem is attached and locked in a single
action.
In the product there is also an RS485 interface allowing
multidrop connections to many types of industrial
equipment.
It also has a single digital input and output. The input
can be used to trigger a number of different user defined
events. The output is a relay that can also be triggered by
a number of different user defined events. Both the digi-
tal input and output are galvanically isolated from the
rest of the modem.
Description
• Extended temperature range -25 °C to +70 °C
• Data rate up to 33.6 kbit / s with Fast Connect
• Terminal rate up to 115.2 kbit / s
• 2-wire Leased Line (also 4-wire Leased Line)
• V.23 HDX with multidrop
• DTR and incoming data dialling
• DIP-switch configuration
• Watchdog
• Secure call back and access
• Industrial environment transient protection on all
interfaces
• Up to 11 data bits
• Tri-Galvanic isolation (interface/ line / supply)
• Caller ID presentation and answering
• Remote configuration
• RS485 interface
• Digital I / O
• Dial backup for PSTN and Leased Line
Characteristics

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SOCOMEC - Réf. : 874 669 A GB
RS232 <=> RTC<=> RS485
Modem
APPROVALS AND CONFORMITY
Type Approval / Compliance
EMC EN 61000-6-2, Immunity industrial environments
EN 55024, Immunity IT equipment
EN 61000-6-3, Emission residential environments
FCC part 15 Class B
EN 50121-4, Railway signalling and telecommunications apparatus
IEC 62236-4, Railway signalling and telecommunications apparatus
Safety EN 60950-1, IT equipment
UL recognised, UL 60950-1
CSA 22.2 No 60950-1-03
PSTN CS 03
FCC part 68
ETSI TS103 021-1, ETSI TS103 021-2, ETSI TS103 021-3
ACA TS001, AS / ACIF S002, AS / ACIF S006
FCC Part 15.105 Notice
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful inter-
ference in a residential installation.
This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• reorient or relocate the receiving antenna,
• increase the separation between the equipment and
receiver,
• connect the equipment into an outlet on a circuit
different from that to which the receiver is connected,
• consult the dealer or an experienced radio / TV techni-
cian for help.

RS232 <=> RTC<=> RS485
Modem
6SOCOMEC - Réf. : 874 669 A GB
APPROVALS AND CONFORMITY
Declaration of conformity
INTER 068 A GB

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SOCOMEC - Réf. : 874 669 A GB
RS232 <=> RTC<=> RS485
Modem
SPECIFICATIONS
Type tests and environmental conditions
ELECTROMAGNETIC COMPATIBILITY
Phenomena Test Description Test levels
ESD EN 61000-4-2 Enclosure contact ± 6 kV
Enclosure air ± 8 kV
RF field AM modulated IEC 61000-4-3 Enclosure 10 V / m 80 % AM (1 kHz), 80 - 1 000 MHz
20 V / m 80 % AM (1 kHz), 80 - 2 000 MHz
RF field 900 MHz ENV 50204 Enclosure 20 V / m pulse modulated 200 Hz, 900 ± 5 MHz
Fast transient EN 61000-4-4 Signal ports ± 2 kV
Power ports ± 2 kV
Surge EN 61000-4-5 Signal ports unbalanced ± 2 kV line to earth, ± 2 kV line to line
Signal ports balanced ± 2 kV line to earth, ± 1 kV line to line
Power ports ± 2 kV line to earth, ± 2 kV line to line
RF conducted EN 61000-4-6 Signal ports 10 V 80% AM (1 kHz), 0.15 - 80 MHz
Power ports 10 V 80 % AM (1 kHz), 0.15 - 80 MHz
Power frequency magnetic field EN 61000-4-8 Enclosure 100 A / m, 50 Hz, 16.7 Hz & 0 Hz
Pulse magnetic field EN 61000-4-9 Enclosure 300 A / m, 6.4 / 16 μs pulse
Voltage dips and interruption EN 61000-4-11 AC power ports 10 & 5 000 ms, interruption
10 & 500 ms, 30 % reduction
100 & 1 000 ms, 60 % reduction
Mains freq. 50 Hz EN 61000-4-16 Signal ports 100 V 50 Hz line to earth
Mains freq. 50 Hz SS 436 15 03 Signal ports 250 V 50 Hz line to line
Voltage dips and interruption EN 61000-4-29 DC power ports 10 & 100 ms, interruption
10 ms, 30 % reduction
10 ms, 60 % reduction
+20 % above & -20 % below rated voltage
Radiated emission EN 55022 Enclosure Class B
FCC part 15 Class B
Conducted emission EN 55022 AC power ports Class B
FCC part 15 AC power ports Class B
EN 55022 DC power ports Class B
Dielectric strength EN 60950 2 kVrms 50 Hz 1 min
3 kVrms 50 Hz 1 min
2 kVrms 50 Hz 1 min (@ rated power < 60 V)
Signal port to other
isolated ports
Power port to other
isolated ports

RS232 <=> RTC<=> RS485
Modem
8SOCOMEC - Réf. : 874 669 A GB
SPECIFICATIONS
Type tests and environmental conditions
ENVIRONMENTAL
Phenomena Test Description Test levels
Temperature Operating -25 to +70 °C
Storage & Transport -40 to +70 °C
Humidity Operating 5 to 95 % relative humidity non condensing
Storage & Transport 5 to 95 % relative humidity non condensing
Altitude Operating 2 000 m / 70 kPa
Reliability prediction (MTBF) MIL-HDBK- 217F Operating
Service life Operating 10 years
Vibration IEC 60068-2-6 Operating 7.5 mm, 5 - 8 Hz
2 g, 8 - 500 Hz
Shock IEC 60068-2-27 Operating 15 g, 11 ms
PACKAGING
Phenomena Test Description Test levels
Enclosure UL 94 PC / ABS Flammability class V-1
Dimension W x H x D 55 x 100 x 132 mm
Weight 0.36 kg
Degree of protection IEC 529 Enclosure IP 20
Cooling Convection
Mounting Horizontal on 35 mm DIN-rail

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Modem RS232 <=> RTC <=> RS485
SPECIFICATIONS
Interface specifications
POWER AV
Rated voltage 16 to 250 VDC
22 to 240 VAC
Operating voltage 14 to 300 VDC
19.8 to 264 VAC
Rated current 125 mA @16 VDC
15 mA @ 110 VDC
8 mA @ 250 VDC
120 mA @ 22 VAC
35 mA @ 95 VAC
28 mA @ 240 VAC
Rated frequency DC / AC 48 - 62 Hz
Inrush current I2t 0.45 A2s
Startup current(1) 0.25 Apeak
Polarity Polarity independent
Isolation to All other ports 3 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Connector size 0.2 - 2.5 mm2(AWG 24-12)
Shielded cable Not required
(1) External supply current capability for proper startup.
POWER LV
Rated voltage 12 to 48 VDC
12 to 27 VAC
Operating voltage 10 to 60 VDC
10 to 30 VAC
Rated current 150 mA @ 12 VDC
70 mA @ 24 VDC
40 mA @ 48 VDC
150 mA @ 12 VAC
70 mA @ 24 VAC
Rated frequency DC / AC 48 - 62 Hz
Inrush current I2t 0.25 A2s
Startup current(1) 0.30 Apeak
Polarity Polarity independent
Isolation to All other ports 3 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Connector size 0.2 - 2.5 mm2(AWG 24-12)
Shielded cable Not required
(1) External supply current capability for proper startup.

RS232 <=> RTC<=> RS485
Modem
10 SOCOMEC - Réf. : 874 669 A GB
SPECIFICATIONS
Interface specifications
PUBLIC SWITCHED TELEPHONE NETWORK (PSTN)
Electrical specification Public Switched Telephone Network
Data rate 300 bit / s - 33.6 kbit / s
Protocol Bell103, Bell212, V.21, V.22, V.22Bis, V.23C, V.32, V.32Bis, V.34
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port 3 kVrms 50 Hz 1 min
Leased Line 2 kVrms 50 Hz 1 min
RS232 2 kVrms 50 Hz 1 min
RS485 2 kVrms 50 Hz 1 min
I / O 2 kVrms 50 Hz 1 min
Connection RJ-11C and Detachable screw terminal
Connector size Detachable screw terminal 0.2 - 2.5 mm2(AWG 24 - 12)
Shielded cable Not required
LEASED LINE (LL)
Electrical specification 2- or 4-wire Leased Line
Data rate 300 bit / s - 33.6 kbit / s
Protocol Bell103, Bell212, V.21, V.22, V.22Bis, V.23C, V.32, V.32Bis, V.34
Transmission range / Budget PSTN 30 dB
Leased Line max 40 dB
Protection Installation Fault Tolerant (up to ± 60 V)
Isolation to Power port 3 kVrms 50 Hz 1 min
PSTN line 2 kVrms 50 Hz 1 min
RS232 2 kVrms 50 Hz 1 min
RS485 2 kVrms 50 Hz 1 min
I / O 2 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Connector size 0.2 - 2.5 mm2(AWG 24 - 12)
Shielded cable Not required

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SOCOMEC - Réf. : 874 669 A GB
Modem RS232 <=> RTC <=> RS485
SPECIFICATIONS
Interface specifications
RS485
Electrical specification EIA/ TIA-485 ITU V.11
2-wire or 4-wire twisted pair
Data rate 1 200 bit / s - 115.2 kbit / s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits
9-12 bit words
Protocol Transparent
Retiming Yes
Turn around time <10 us (half duplex)
Transmission range ≤1200 m, depending on data rate and cable type (EIA RS485)
Settings 120 Ωtermination and failsafe biasing 680 Ω
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port 3 kVrms 50 Hz 1 min
PSTN line 2 kVrms 50 Hz 1 min
Leased Line 2 kVrms 50 Hz 1 min
I / O 1.5 kVrms 50 Hz 1 min
Galvanic connection to RS232
Connection Detachable screw terminal
Connector size 0.2 - 2.5 mm2(AWG 24 - 12)
Shielded cable Not required(1)
Miscellaneous Do not connect RS232 and RS485 simultaneously
(1) Railway installation close to the rails.
For a cable located within 3 m and connected to this port, the use of shielded cable is recommended, this is to minimise the risk of
interference. The cable shield should be properly connected (360 °) to an earthing point within 1 m of this port. This earthing point should
have a low impedance connection to the conductive enclosure of the apparatus cabinet, or similar, where the unit is built-in. This
conductive enclosure should be connected to the earthing system of an installation and may be directly connected to the protective earth.

RS232 <=> RTC<=> RS485
Modem
12 SOCOMEC - Réf. : 874 669 A GB
SPECIFICATIONS
Interface specifications
RS232
Electrical specification EIA / TIA-232
Data rate 1 200 bit / s - 115.2 kbit / s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits
9-12 bit words
Protocol Transparent
Retiming Yes
Transmission range Cable length ≤15 m
Isolation to Power port 3 kVrms 50 Hz 1 min
PSTN line 2 kVrms 50 Hz 1 min
Leased Line 2 kVrms 50 Hz 1 min
I / O 1.5 kVrms 50 Hz 1 min
Galvanic connection to RS485
Connection 9-pin D-sub female (DCE) and Detachable screw terminal (DCE)
Connector size Detachable screw terminal 0.2 - 2.5 mm2(AWG 24 - 12)
Shielded cable Not required(1)
Miscellaneous Do not connect RS232 and RS485 simultaneously
(1) Railway installation close to the rails.
For a cable located within 3 m and connected to this port, the use of shielded cable is recommended, this is to minimise the risk of
interference. The cable shield should be properly connected (360 °) to an earthing point within 1 m of this port. This earthing point should
have a low impedance connection to the conductive enclosure of the apparatus cabinet, or similar, where the unit is built-in. This
conductive enclosure should be connected to the earthing system of an installation and may be directly connected to the protective earth.

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SOCOMEC - Réf. : 874 669 A GB
Modem RS232 <=> RTC <=> RS485
SPECIFICATIONS
Interface specifications
GENERIC I / O INTERFACE INPUT
Electrical specification Opto isolated input
Input voltage range 0 - 60 VDC
Input current 5 mA @ 60 VDC
Input inactive Uin < 2.5 V
Input active Uin > 5.0 V
Transmission range Cable length ≤15 m
Connection Detachable screw terminal (DCE)
Isolation to Power port 3 kVrms 50 Hz 1 min
PSTN line 2 kVrms 50 Hz 1 min
Leased Line 2 kVrms 50 Hz 1 min
RS232 2 kVrms 50 Hz 1 min
RS485 2 kVrms 50 Hz 1 min
I / O output 2 kVrms 50 Hz 1 min
Shielded cable Not required(1)
(1) Railway installation close to the rails.
For a cable located within 3 m and connected to this port, the use of shielded cable is recommended, this is to minimise the risk of
interference. The cable shield should be properly connected (360 °) to an earthing point within 1 m of this port. This earthing point should
have a low impedance connection to the conductive enclosure of the apparatus cabinet, or similar, where the unit is built-in. This
conductive enclosure should be connected to the earthing system of an installation and may be directly connected to the protective earth.
GENERIC I / O INTERFACE RELAY OUTPUT
Electrical specification One change over contact
Switching voltage Max 40 V AC / DC
Switching current Max 500 mA AC / DC
Electrical endurance 5 x 105operations at 20 W / 20 VA Resistive load
Transmission range Cable length ≤15 m
Connection Detachable screw terminal (DCE)
Isolation to Power port 3 kVrms 50 Hz 1 min
PSTN line 2 kVrms 50 Hz 1 min
Leased Line 2 kVrms 50 Hz 1 min
RS232 1.5 kVrms 50 Hz 1 min
RS485 1.5 kVrms 50 Hz 1 min
I / O input 2 kVrms 50 Hz 1 min
Shielded cable Not required(1)
(1) Railway installation close to the rails.
For a cable located within 3 m and connected to this port, the use of shielded cable is recommended, this is to minimise the risk of
interference. The cable shield should be properly connected (360 °) to an earthing point within 1 m of this port. This earthing point should
have a low impedance connection to the conductive enclosure of the apparatus cabinet, or similar, where the unit is built-in. This
conductive enclosure should be connected to the earthing system of an installation and may be directly connected to the protective earth.

RS232 <=> RTC<=> RS485
Modem
14 SOCOMEC - Réf. : 874 669 A GB
INSTALLATION
Connections
PSTN
Position Product marking
RJ-11C Screw Direction(1) Description RJ-11C Screw
terminal(2) terminal
aNC
b In/Out PSTN Transmit / Receive
Disconnects from “pin c”
when the modem goes
Off-Hook
c 2 In/Out PSTN Transmit / Receive LL2
d 1 In/Out PSTN Transmit / Receive LL1
e In/Out PSTN Transmit / Receive
Disconnects from “pin c”
when the modem goes
Off-Hook
fNC
(1) Direction relative to this unit.
(2) The PSTN screw terminals are shared with 2-wire Leased Line.
NC = Not Connected.
RS232 (DTE)
Position
D-sub Screw Direction(1) Description D-sub description
terminal
No. 1 No. 4 Out Data Carrier Detect (DCD)
No. 2 No. 7 Out Received Data (RD)
No. 3 No. 8 In Transmitted Data (TD)
No. 4 No. 3 In Data Terminal Ready (DTR)
No. 5 No. 1 - Signal Ground (SG)
No. 6 No. 2 Out Data Set Ready (DSR)
No. 7 No. 6 In Request To Send (RTS)
No. 8 No. 5 Out Clear To Send (CTS)
No. 9 No. 9 Out Ring Indicator (RI)
(1) Direction relative to this unit.
1
2
3
4
5
6
7
8
9
RS485
Position Direction(1) Description Product marking
No. 3 In/Out T- (A / A’) Tranmit / Receive T-
RS485 2 wire
No. 4 In/Out T+ (A/A’) Tranmit / Receive T+
RS485 2 wire
(1) Direction relative to this unit.
POWER
Position Direction(1) Description Product marking
No. 1 In AC: neutral
DC: -voltage
No. 2 In AC: Line
DC: +voltage
(1) Direction relative to this unit.
I / O INPUT / RELAY OUTPUT
Position Direction(1) Description Product marking
No. 1 In Input + +
No. 2 In Input - -
No. 1 In/Out Normal closed contact NC
No. 2 In/Out Common contact C
No. 3 In/Out Normal open contact NO
(1) Direction relative to this unit.
LEASED LINE
Position Direction(1) Description Product marking
No. 1 Out 4-wire Transmit LL1
In/Out 2-wire Receive/ Transmit
No. 2 Out 4-wireTransmit LL2
In/Out 2-wire Receive/ Transmit
No. 3 In 4-wire Receive LL3
In/Out
2-wire Receive/ Transmit at
Leased Line PSTN backup
No. 4 In 4-wire Receive LL4
In/Out
2-wire Receive/ Transmit at
Leased Line PSTN backup
(1) Direction relative to this unit.
RS232
(DTE)
I/O
input / relay
output
Power
Led
indicators
I/O
input / relay
output
PSTN
Leased
Line
RS485
INTER 014 A

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SOCOMEC - Réf. : 874 669 A GB
Modem RS232 <=> RTC <=> RS485
INSTALLATION
LED indicators
LED Status Description
TD OFF No data
Transmit data ON / FLASH The modem receiving data on the DTE interface
RD OFF No data
Receive data ON / FLASH The modem transmitting data on the DTE interface
RTS OFF RTS signal is inactive
Request to send ON RTS signal is active
DCD OFF DCD signal is inactive
Data carrier detect ON DCD signal is active, modem has detected a carrier or the signal is set to always ON
DTR OFF DTR signal is inactive
Data carrier detect ON DTR signal is active
REL OFF Reliable mode is OFF, direct or normal mode
Reliable mode ON Reliable mode is ON
FLASH Reliable mode with error correction and compression
LINE OFF The modem is on-hook
ON The modem is off-hook with an established connection
FLASH The modem is off-hook and negotiating
PWR OFF The modem has no power
Power ON The modem is up and running
FLASH The modem is in the power-on selftest
I / O IN OFF The I / O input is inactive
ON The I / O input is active
I / O OUT OFF The I / O output is inactive, C and NC connected
ON The I / O output is active, C and NO connected
INTER 113 A

RS232 <=> RTC<=> RS485
Modem
16 SOCOMEC - Réf. : 874 669 A GB
INSTALLATION
DIP-switch settings
BEFORE DIP-SWITCH SETTINGS
Prevent damage to internal electronics from electrostatic
discharges (ESD) by discharging your body to a groun-
ding point (e.g. use of wrist strap).
DIP-switch alterations are only effective after
a power on.
S1
S4
S1 DIP-SWITCH
> Remote configuration control
S2 S5
S3
ON
12345678
Remote configuration disabled.
ON
12345678
Remote configuration enabled.
> Selection of DTE speed
ON
12345678
Auto Baud.
ON
12345678
19.2 bit / s.
ON
12345678
1 200 bit / s.
ON
12345678
38.4 bit / s.
ON
12345678
2 400 bit / s.
ON
12345678
57.6 bit / s.
ON
12345678
4 800 bit / s.
ON
12345678
115.2 bit / s.
ON
12345678
9 600 bit / s.
> Selection of DTE format
ON
12345678
7E 1S.
ON
12345678
7E 2S.
ON
12345678
7O 1S.
ON
12345678
7O 2S.
ON
12345678
8N 1S.
ON
12345678
8N 2S.
ON
12345678
8E 1S.
ON
12345678
8E 2S.
ON
12345678
8O 1S.
ON
12345678
8O 2S.
ON
12345678
Direct Mode 8E, 8O.
ON
12345678
Direct Mode 8E, 8O 2S.
ON
12345678
Direct Mode 7E, 7O, 8N.
ON
12345678
Direct Mode 7E, 7O, 8N 2S.
ON
12345678
7N 2S.
INTER 014 A

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Modem RS232 <=> RTC <=> RS485
INSTALLATION
DIP-switch settings
S2 DIP-SWITCH
> Leased Line Mode selection
ON
12345678
Leased Line disable, PSTN enable.
ON
12345678
Leased Line answering.
ON
12345678
Leased Line multidrop.
ON
12345678
Leased Line calling.
> DTE interface selection
ON
12345678
RS485 disable, RS232 enable.
ON
12345678
RS485 enable, RS232 disable.
> RS485
ON
12345678
RS485, 2-wire.
> Leased Line 2/4 wire selection
ON
12345678
Leased Line 2-wire.
ON
12345678
Leased Line 4-wire.
> Selection PSTN backup of Leased Line
ON
12345678
Backup of Leased Line disabled.
ON
12345678
Backup of Leased Line enabled.
> Selection of answering/ calling mode for PSTN backed up Leased Line
ON
12345678
Answering.
ON
12345678
Calling.
> Remote configuration control
ON
12345678
Use stored values.
ON
12345678
Remote configuration enabled.

RS232 <=> RTC<=> RS485
Modem
18 SOCOMEC - Réf. : 874 669 A GB
INSTALLATION
ON
12345678
Termination disabled.
ON
12345678
Termination of Receiver in 4-wire mode.
ON
12345678
Termination of Transmitter / Receiver in 2-wire mode
and Transmitter in 4-wire mode.
ON
12345678
Termination of both Transmitter
and Receiver in 4-wire mode.
DIP-switch settings
S3 DIP-SWITCH
> Multidrop Leased Line termination
ON
12345678
Use stored value for AT & Kn.
ON
12345678
RTS/ CTS flow control enable AT & K3.
> Flow control DTE interface
ON
12345678
Use stored values.
ON
12345678
PLC settings ATQ1E0 & C1 & K0 & A1.
> PLC parameter setting
ON
12345678
Use stored values.
ON
12345678
Reliable mode AT\N2 enable.
ON
12345678
Reliable mode AT\N0 disable.
> Reliable mode setting
ON
12345678
Use stored values.
ON
12345678
Enable blind dialing ATX3.
> Blind dialing
ON
12345678
Use stored values.
ON
12345678
Dial abort disabled AT & A1.
> Dial abort

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SOCOMEC - Réf. : 874 669 A GB
Modem RS232 <=> RTC <=> RS485
INSTALLATION
ON
12345678
Use saved parameters defined by AT+MS.
ON
12345678
V.21 300.
ON
12345678
V.23 1 200 hdx.
ON
12345678
V.22 1 200.
ON
12345678
V.22bis 2 400.
ON
12345678
V.32bis 4 800.
ON
12345678
V.32bis 7 200.
ON
12345678
V.32bis 9 600.
ON
12345678
V.32bis 12 000.
ON
12345678
V.32bis 14 400.
ON
12345678
V.34 19 200.
ON
12345678
V.34 24 000.
ON
12345678
V.34 28 800.
ON
12345678
V.34 33 600.
ON
12345678
Automatic line speed.
DIP-switch settings
S4 DIP-SWITCH
> Selection of line speed and modulation
ON
12345678
Use stored values.
ON
12345678
Auto retrain disabled AT %E0.
> Auto retrain control
ON
12345678
Use stored values.
ON
12345678
Data compression AT %C0 disabled.
> Data compression control
ON
12345678
Use stored values.
ON
12345678
DCD and DSR always on, DTR ignored. AT & C0 &
D0 & S0
> DCD, DTR and DSR control
ON
12345678
Use stored values.
ON
12345678
Restore factory default setting(1)
> Set modem to factory default
(1) Don’t leave S4: 1 in ON position if not intending to restore factory setting at every power on.

RS232 <=> RTC<=> RS485
Modem
20 SOCOMEC - Réf. : 874 669 A GB
INSTALLATION
ON
1234
ON
1234
No termination. Termination of both T and R in 2-wire connection.
DIP-switch settings
RS485 general advice
S5 DIP-SWITCH
> RS485 termination
ON
12345678
S1.
ON
12345678
S2.
ON
12345678
S3.
ON
12345678
S4.
S5.
FACTORY DEFAULT
ON
1234
= Termination
DIRISA20 DIRISA40 COUNTISCi
Max 0.3 metre
T+
T–
T+ T+ A-T-T B
2-wire termination
Termination recommendations
The RS485 line must be terminated. In the modem, the
termination is combined with fail-safe functionality.
The termination is used to prevent undefined states when
the bus is in condition:
• using 2-wire RS485 both ends should be terminated.
RS485 connection pins can be differently named. For
some equipment brands the T+corresponds to A, but
other brands might use some other naming convention.
If a unit does not work it can help to swap A and B.
INTER 114 A GB