iRZ MC55iT User manual

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Contents
1.Introduction............................................................................................................................. 4
1.1.Document description..................................................................................................................... 4
1.2.Service data................................................................................................................................... 4
1.3.Safety rules.................................................................................................................................... 4
2.General Information................................................................................................................ 5
2.1.Purpose.......................................................................................................................................... 5
2.2.Set ................................................................................................................................................. 5
2.3.Features......................................................................................................................................... 5
2.4.Appearance.................................................................................................................................... 7
2.5.Interfaces....................................................................................................................................... 8
2.5.1. DB9 Connector (RS232).......................................................................................................... 8
2.5.2. Power connector..................................................................................................................... 9
2.5.3. Audio connector.................................................................................................................... 10
2.6.Modem status display................................................................................................................... 10
3.Connecting and configuring................................................................................................. 11
3.1.Connecting................................................................................................................................... 11
3.2.Control, rebooting, and connecting................................................................................................ 11
4.Support.................................................................................................................................. 12

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List of tables
Table 2.5.1: Using DB9 connector pins..............................................................................................8
Table 2.5.2: Using power connector pins...........................................................................................9
Table 2.5.3: Using audio connector pins..........................................................................................10
Table 2.6.1: Connection status display ............................................................................................ 10
List of figures
Fig. 2.1. Front view............................................................................................................................ 7
Fig. 2.2. Back view............................................................................................................................. 7
Fig. 2.3. Connector DB9 ....................................................................................................................8
Fig. 2.4. Power connector..................................................................................................................9
Fig. 2.5. Audio connector.................................................................................................................10

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1. Introduction
1.1. Document description
This manual is intended for experienced PC users. It describes the device and the operation of the GSM
modem iRZ MC55iT.
1.2. Service data
Document version Issue date
2.11 08.28.2013
Prepared by V.N. Golovin Approved by P.A. Kosolapov
1.3. Safety rules
Restrictions on the use of the device near other electronic devices:
Turn the modem off in hospitals or when located near medical equipment such as pacemakers, hearing
aids and so on. Interference for medical equipment may occur
Turn the terminal off when on an airplane. Take measures to avoid accidental turning on
Turn the modem off in the vicinity of gas stations, chemical plants, and places where demolition work is
conducted. Interference for technical devices may occur
At a close range, the modem can produce interference for television sets and radio transmitters
Maintenance requirements:
Protect the modem against external hazards (high temperatures, caustic chemicals, dust, water and so
on)
Keep the modem safe from blows, falls, and strong vibrations
Do not attempt to take apart or modify the modem on your own. Such actions will void your warranty
Note: Make sure you follow the operation manual for this device. Improper use of the device will disqualify
your warranty.

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2. General Information
2.1. Purpose
iRZ MC55iT modem is an industrial GSM modem for receiving and transmitting data, text messages and
faxes. It is perfectly suited both for providing mobile access to the Internet and for industrial applications
including telemetry, wireless data collection from sensors, remote monitoring, control, and signaling.
The modem is controlled by standard AT-commands. The device is equipped with LEDs to monitor
connection status and signal for emergency.
2.2. Set
The set of the iRZ MC55iT GSM modem includes:
iRZ MC55iT modem;
Factory package
2.3. Features
Key features:
Frequency bands: GSM 850/900/1800/1900 MHz;
Output power:
2W (class 4 for EGSM 900);
1W (class 1 for GSM 1800);
GPRS class 10;
TCP/IP stack accessed via AT-commands;
MS class B;
CSD up to 14.4 kbps;
USSD;
SMS;
Voice transmission;
Fax group 3, class 1
Power:
Power supply from 9 to 30V;
Consumption current not exceeding:
with the supply voltage of +12V — 200mA;
with the supply voltage of +24V — 100mA

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Physical characteristics:
Dimensions not exceeding 69х75х26 mm;
Weight: 100g max.;
Operating temperatures from -40°Сto +65°С;
Storage temperatures from -50°Сto +85°С;
Interfaces:
TJ6-6P6C for RJ12 power connector for powering the modem, launching and shutdown;
TJ-4P4C audio connector for connecting the audio equipment;
DB9 connector (female) for connecting the communication cable, RS232 interface;
FME Jack (male) for connecting the GSM antenna

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2.4. Appearance
MC55iT modem is a compact device in a plastic case. Its appearance is displayed on Fig. 2.4.1 and
Fig. 2.4.2:
Fig. 2.1. Front view
Fig. 2.2. Back view
The numbers on Fig. 2.4.1 and Fig. 2.4.2 stand for:
1. TJ4-4P4C audio connector for connecting the audio equipment
2. Network LED
3. SIM card holder
4. SIM card holder ejector button
5. DB9 connector (female) for connecting the RS232 communication cable
6. TJ6-6P6C power connector
7. FME Jack (male) for connecting the GSM antenna

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2.5. Interfaces
2.5.1. DB9 Connector (RS232)
This connector is used for connecting the modem to the control device using the RS232 exchange protocol.
Factory settings: speed – autodetect, data bit – 8, parity – no, stop bit – 1.
The AT-commands are used to control the modem operation (see the module description). Please see the
external look of the connector on Figure 2.3:
Fig. 2.3. Connector DB9
Table 2.5.1: Using DB9 connector pins
Pin Signal Direction Purpose
1 DCD Modem-PC Data Carrier Detect
2 RXD Modem-PC Received Data
3 TXD PC-Modem Transmitted Data
4 DTR PC-Modem Data Terminal Ready
5 GND General Common Ground
6 DSR Modem-PC Data Set Ready
7 RTS PC-Modem Request to Send
8 CTS Modem-PC Clear to Send
9 RI Modem-PC Ring Indicator
The purpose of pins is consistent with the serial interface to ITU-T V.24 Interchange Circuits DCE.
The length of the cable is not to exceed 1.8 m. It is recommended to set data transfer speed that does not
exceed 115200 bit/s.
Attention: RS232 standard (COM-port) does not support a "hot" connection.
To avoid damaging the COM-port of the modem connect and disconnect the device at least 5 seconds after
the power of the connecting devices has been turned off.

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2.5.2. Power connector
The connector TJ-6P6C is used to power the device.
Fig. 2.4. Power connector
Table 2.5.2: Using power connector pins
Pin Signal Purpose
1 + 12V The positive pole of DC supply voltage. Fused circuit and overvoltage
protection (when input voltage of over 30V is applied) and reverse polarity.
2 Not used
3 Not used
4 Not used
5 Not used
6 GND Ground

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2.5.3. Audio connector
The connector TJ-4P4C is used to connect the audio equipment.
Fig. 2.5. Audio connector
Table 2.5.3: Using audio connector pins
Pin Signal Purpose
1 MICP Non-inverted microphone input and microphone powering
2 SPKP Non-inverted headphone output
3 SPKN Inverted headphone output
4 MICN Inverted microphone input
2.6. Modem status LED
LED is used to indicate the connection status. This function can be controlling by a corresponding
AT-command (AT^SSYNC=1 — LED mode on; AT^SSYNC=0 — LED mode off). By default, AT^SSYNC=1.
Table 2.6.1: Connection status display
LED mode Conditional indication
display Operation mode
Turned off ○Modem is turned off or indication is shut down,
sleep mode, power-saving mode
600ms on/ 600ms off ●●●●●●○○○○○○ Modem is not logged to the network
75ms on / 3s off ●○○○○○○○○○...○Modem is logged to the network
75ms on / 75ms off /
75ms on / 3s off
●○●○○○○○○○...○GPRS connection is activated
500ms on/ 50ms off ●●●●●○Data transfer in progress
Permanently turned on ●Voice call, CSD

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3. Connecting and configuring
3.1. Connecting
Only individuals with specialized technical training and those who have studied the product specifications
are permitted to assemble (install) the modem.
Before connecting the device install the SIM card into the modem (the SIM card must be unlocked). The
SIM card must be connected and removed when the power is turned off. In order to install the SIM card do the
following:
Eject the SIM holder by pressing the SIM card tray ejector button (Fig. 2.1)
Place the SIM card into the SIM card tray
Insert the SIM card holder with the SIM card into the modem
Be careful when installing the SIM card.
Connect the GSM antenna and the RS232 commuting cable. Power the modem through the power
connector or the umbilical connector (Fig. 2.2). The frequent blinking of the green LED indicates that the
modem is turned on (Table 2.6.1). Remove the PIN code of the SIM card to complete automatic online
registration. After the registration is complete the modem goes into the working mode and green LED blinks
less frequently.
Note: GSM antenna, the commuting cables and the power supply are not included in the set.
3.2. Control, rebooting, and connecting
The modem is controlled by standard AT-commands. You can download the description of the
AT-commands at www.irz.net.
The modem can be rebooted using one of the following ways:
Program method using the AT-commands
Eight transitions of the DTR COM port line into a passive state (DTR < 3V), the duration of the impulses
and pauses between the impulses should remain within the range of 100-500ms
Temporary power shutdown
The modem can be shut down using one of the following ways:
Program method using the AT-commands
Power shutdown.
When shutting down using the AT-commands, the modem goes into the sleep mode (minimal power
consumption). The modem wakes up:
When DTR line of COM port goes from “passive” to “active” mode
Switch-over of modem into power saving mode by using AT-command "AT+CFUN". For more detail see
AT-commands description for the GSM module.

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4. Support
New document versions and software are available using:
St. Petersburg
The company’s website: www.radiofid.ru
Phone number in St. Petersburg: [phone]
E-mail: [e-mail]
Moscow
The company’s website: www.digitalangel.ru
Phone number in Moscow: [phone]
E-mail: [e-mail]
Our support team is ready to assist you with any questions you might have when installing, configuring or
solving issues with our equipment.