Print version

2. Product

M!DGE3 is a cellular router platform designed for any real-time environment. M!DGE3 cellular routers are native IP devices, with Linux OS that have been designed with attention to detail, performance and quality.

M!DGE3 is built into a rugged metal casing that allows for multiple installation possibilities, see Section 4.3, “Mounting”.


2.1. Dimensions

M!DGE3 dimensions

Fig. 2.1: M!DGE3 dimensions

M!DGE3 Edge-bracket dimensions

Fig. 2.2: M!DGE3 Edge-bracket dimensions

M!DGE3 flat bracket dimensions

Fig. 2.3: M!DGE3 flat bracket dimensions

For more information see Section 4.3.1, “DIN rail mounting” and Section 4.3.2, “Flat mounting”.

2.2. Connectors

All connectors are located on the front and bottom panel. The front panel contains even LEDs. The HW button is located on the front panel as well (close to the upper edge).


Fig. 2.4: Connectors

2.2.1. Antenna

Antenna connectors

Fig. 2.5: Antenna connectors

An antenna can be connected to M!DGE3 via SMA female 50 Ω connector.

M!DGE3 is equipped with two connectors. The ANT1 connector will be used for common transmitting and receiving. The ANT2 connector will be used as a Rx diversity connector.


For optimal LTE connection, using both antennas (Rx diversity) is recommended. If only one antenna is used, attach it to the ANT1 connector.


M!DGE3 cellular router may be damaged when operated without an antenna or a dummy load.

2.2.2. Power and Control

This rugged connector connects to a power supply and it contains control signals. A plug with screw-terminals and retaining screws for power and control connector is supplied with each M!DGE3. It is Tyco 7 pin terminal block plug, part No. 1776192-7, contact pitch 3.81 mm. The connector is designed for electric wires with a cross section of 0.5 to 1.5 mm2. Strip the wire leads to 6 mm (1/4 inch). Isolated cables should receive PKC 108 or less end sleeves before they are inserted in the clip. Insert the cables in the wire ports, tightening securely.

Tab. 2.1: Pin assignment

  • pull below 1.1 VDC to activate (1.1 VDC / 1.9 VDC threshold hysteresis)

  • max. 50 VDC

  • pull below 1.1 VDC to activate (1.1 VDC / 1.9 VDC threshold hysteresis)

  • max. 50 VDC

open drain output max. 50 VDC, 1 A
6++ POWER (10 to 50 V)
Undervoltage threshold 8.5 VDC
Overvoltage threshold 55 VDC

Pins 3 and 7 are connected internally.
Pins 4 and 6 are connected internally.
Minus pole (GND) is internally connected with casing.

Supply connector

Fig. 2.6: Supply connector

Power and Control - cable plug

Fig. 2.7: Power and Control – cable plug


HW ALARM INPUT is a digital input. If grounded (e.g. by connecting to pin 3), an external alarm is triggered.


HW ALARM OUTPUT is a digital output.


The POWER pins labelled + and – serve to connect a power supply 10–50 VDC. The requirements for a power supply are defined in Section 4.8, “Power supply” and Chapter 9, Technical parameters.

2.2.3. ETH1 – ETH4

Standard RJ45 connectors for Ethernet connection. M!DGE3 has 10/100/1000Base-T Auto MDI/MDIX interfaces so it can connect to 10 Mb/s, 100 Mb/s or 1000 Mb/s Ethernet network. The speed can be selected manually or recognized automatically by M!DGE3. M!DGE3 is provided with Auto MDI/MDIX function which allows it to connect over both standard and cross cables, adapting itself automatically.

Pin assignment

Tab. 2.2: Ethernet to cable connector connections

PinSignalDirect cableCrossed cable 
1TX+ orange – white green – white
2TX- orange green
3RX+ green – white orange – white
4 blue blue
5 blue – white blue – white
6RX- green orange
7 brown – white brown – white
8 brown brown

2.2.4. ETH5 (SFP)

SFP slot

Fig. 2.8: SFP slot

ETH5 is a standard SFP slot for 10/100/1000 Mb/s Ethernet SFP modules, user exchangeable with maximal power consumption 1.25 W. Both fibre optic and metallic Ethernet SFP modules are supported. For optical both single and dual mode fibre optics Ethernet modules (= 2 or 1 fibers) can be used. CSFP modules are not supported.
RACOM offers all mentioned types of SFP modules, tested to be M!DGE3 compatible as a standard accessory.

The SFP status LED is located just next to the slot. It is controlled by SFP module. Its function is specific for each SFP module. The typical behavior is an indication the received signal from the fibre optic or metallic link to be within operational range.


It is strongly recommended to use a high quality SFP module with industry temperature range. The SFP modules listed in Accessories are thoroughly tested by RACOM and are guaranteed to function with M!DGE3 units. It is possible to use any other SFP module, but RACOM cannot guarantee they will be completely compatible with M!DGE3 units.

2.2.5. COM

M!DGE3 provides serial interface COM terminated by 5 pin terminal connector which is supplied with each M!DGE3 unit. It can be configured as RS232 or RS485. It is Tyco 5 pin terminal block plug, part No. 1776192-5, contact pitch 3.81 mm. The connector is designed for electric wires with a cross section of 0.5 to 1.5 mm2. Strip the wire leads to 6 mm (1/4 inch). Isolated cables should receive PKC 108 or less end sleeves before they are inserted in the clip. Insert the cables in the wire ports, tightening securely.

RS232 of M!DGE3 is a hard-wired DCE (Data Communication Equipment) device. Equipment connected to the serial port of M!DGE3 unit should be DTE (Data Terminal Equipment).

RS485 of M!DGE3 is not galvanic isolated and it is not terminated.

Tab. 2.3: COM pin description

COM – RS232COM – RS485 
PinSignalIn/ OutSignalIn/ Out
3RxDOutline BIn/Out
4TxDInline AIn/Out

M!DGE3 keeps pin 6 DSR at the level of 0 (state ON, approx. +6.2 V) by RS232 standard permanently.


2.2.6. USB

M!DGE3 uses USB 3.0, Host A interface. USB interface is wired as standard:

Tab. 2.4: USB A Pinout Cable Assembly

ShellShieldConnector Shell

The USB interface is designed for the connection to an external ETH/USB adapter or a WiFi adapter. They are optional accessories to M!DGE3, for more details see www/ripex/accessories. The adapters are used for service access to web configuration interface of M!DGE3 unit.

The USB connector also provides power supply (5 V / 0.5 A). It can be used to temporarily power a connected device, for instance a telephone. The USB connector should not be used as permanent source of power supply.

2.2.7. DI/DO

Tab. 2.5: Digital Inputs and Outputs

1DI1+Digital input (differential) – Positive – (P)
2 DI1-Digital input (differential) – Negative – (N)

Digital Output 1

5 DO2

Digital Output 2

7DI2Digital Input 2
8DI3Digital Input 3

  • Digital Outputs:

    • Open drain output max. 50 VDC, 0.2 A

  • Isolated differential digital input:

    • Input voltage difference (P-N) > 1.9 VDC Logic “H”

    • Input voltage difference (P-N) < 1.1 VDC Logic “L”

    • Maximum differential voltage 50 V

  • Digital inputs:

    • Schmitt-triggered inverted input

    • Pull below 1.1 VDC to activate (1.1 VDC / 1.9 VDC threshold hysteresis)

    • Max. 50 VDC

2.2.8. HW button

HW button

Fig. 2.9: HW button

HW button is placed on the right side of M!DGE3, next to the logo.

HW button scheme

Fig. 2.10: HW button scheme

HW button operation

  • Press less than 2 seconds – Nothing happens

  • Press from 2 up to 7 seconds – Reboot is performed on button release

  • Press from 7 up to 20 seconds – Factory settings are performed on button release

  • Press more than 20 seconds – Nothing happens

2.2.9. SIM cards

Two SIM card holders for Micro SIM (3FF) are available under the screwed cover on the M!DGE3 right side.


Disconnect M!DGE3 unit from a power supply before opening the cover and manipulating with SIM cards.

2.3. Indication LEDs

LEDs indicator is placed on M!DGE3’s front panel.

Indication LEDs

Fig. 2.11: Indication LEDs

Tab. 2.6: Key to LEDs

SYSGreenPermanently litSystem OK
Flashing – period 500 msReset button pushed
Three fast (50 ms) flashes – pause (500 ms)Reset button factory reset
Flashing regularly – period 2000 msSleep mode activated
RedPermanently litAlarm
Flashing regularly – period 500 msSerious system error
OrangePermanently litUnit booting
Three fast (75 ms) flashesUSB flash disc inserted
Flashing fast (75ms) – period 1000 msInteraction with USB flash disc
Green / OrangeFlashing regularly – period 300 msFW activation – do not shut down the device
WANGreen / Orange / RedPermanently lit, or flashing in 1 sec

Permanently lit – connected to the cellular network. Color signalizes signal strength

Flashing – connecting into the cellular network.

EXTGreenPermanently lit

Activity of mPCIe connected equipment (like GPS fix, LTE connected, …)

RedPermanently lit

Alarm of mPCIe connected equipment

Table of Signal levels for individual services for cellular interface
Table of GNSS activity
VPNRedPermanently litPending
COMGreenPermanently litData receiving
OrangePermanently litData transmitting


An Alarm is triggered by any event with severity Error or higher (see Section 8.4, “Events”).

2.4. Extension

M!DGE3 cellular router can be delivered with additional (optional) second cellular module, GPS extension or COM extension. In case of Cellular or GPS it comes with two additional SMA connectors installed on the bottom panel (EXT1, EXT2). Activity of any extension module is signalized on M!DGE3’s front panel (EXT LED).

2.4.1. Cellular

It is recommended to use both antennas (Rx diversity) for the LTE connection. In case of using only one antenna, attach it to the EXT1 connector. The EXT1 connector is used for both transmitting and receiving, or for single-antenna setups. The EXT2 connector is specifically for Rx diversity.

When the 2nd cellular module is used, LED behavior of this extension is signalized by Green / Orange / Red LED

  • Permanently lit – Connected to the cellular network (color signalize signal strength)

  • Flashing in 1 sec interval – Connecting into the cellular network

2.4.2. GPS

M!DGE3 cellular router will be equipped with the GPS receiver with time pulse output. EXT1 connector is used for connection of the active GPS antenna, EXT2 connector is used for the precise time pulse output.

2.4.3. COM2 – COM3

The 2nd and 3rd COM ports are available when the Extension module ‘C’ (2 x RS232) is installed. In such a case: The DI/DO connector is used as a connector for COM2 and COM3.

COM2 and COM3 parameters:

  • COM2: RS232 – 5 pin (RxD, TxD, GND, RTS, CTS) 600 b/s to 2 Mb/s

  • COM3: RS232 – 3 pin (RxD, TxD, GND) 2.4 kb/s to 921.6 kb/s

    Tab. 2.7: DI/DO connector used by Extension module ‘C’

    PinSignalIn / Out 
    1RxD COM3Out
    2TxD COM3In
    4CTS COM2Out
    5RTS COM2In
    7RxD COM2Out
    8TxD COM2In

2.5. Ordering codes


  • Trade name – trade and marketing name of the product. This name is used for all products within the same product family.

    • Possible values: M!DGE

  • Gen. – generation of the product of specific Trade name. The very first generation does not have any number in this position.

    • Possible values: 3

  • Main

    • Possible values:

    • N – not used

    • W – Extension cellular module; Part No.: mPCIe-W
      Bands W – 4G/3G/2G, Global

  • Ext. – Extension module embedded in mPCIe slot

    • Possible values:

    • N – not used

    • W – Extension cellular module; Part No.: mPCIe-W
      Bands W – 4G/3G/2G, Global

    • M – Extension cellular module; Part No.: mPCIe-M
      Bands M – LTE Cat M1/NB1/NB2, Global (incl. 450 MHz)

    • O – Extension cellular module; Part No.: mPCIe-O
      Bands O – LTE Cat M1/NB1/NB2, Global

    • G – Extension GPS (GNSS) module; Part No.: mPCIe-GPS

    • C – Extension 2× RS232; Part No.: mPCIe-COMS

    Only one option for mPCIe slot is possible.

  • Var. – Hardware variant (not used for M!DGE3)

    • Possible values:

    • C – M!DGE3e

  • SW keys – if unit is ordered with SW keys, all keys are specified in this bracket. SW key can be ordered independently for specific S/N anytime later on.

    • Possible values:

    • SFP – enables SFP interface; Part No.: M!DGE3-SW-SFP

  • Type – specific product type

    • Possible values:

    • M!DGE3

  • Code – part of order code which is printed on Product label on the housing (SW keys are not HW dependent and can be ordered later on, so they are not printed on Product label).

  • Order code – the complete product code, which is used on Quotations, Invoices, Delivery notes etc.

    In order to find out the correct Order code, please use E-shop.

©  2024 RACOM s.r.o. All Rights Reserved.