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1. Product

RipEX2 is a radio modem platform renowned for overall data throughput in any real-time environment. RipEX2 radio modems are native IP devices, Software Defined with Linux OS that have been designed with attention to detail, performance and quality.

RipEX2 is built into a rugged die-cast aluminium casing that allows for multiple installation possibilities, see Section 4.1, “Mounting”.


1.1. Dimensions

RipEX2 dimensions

Fig. 1.1: RipEX2 dimensions

RipEX2 dimensions – bottom

Fig. 1.2: RipEX2 dimensions – bottom

RipEX2 with DIN rail

Fig. 1.3: RipEX2 with DIN rail

RipEX2 dimensions with connectors

Fig. 1.4: RipEX2 dimensions with connectors

For more information see and Section 4.1.2, “Flat mounting”.

1.2. Connectors

All connectors are located on the front panel. The upper side features an LED panel. The RESET button is located in an opening in the bottom side.


Fig. 1.5: Connectors

1.2.1. Antenna

Antenna connectors

Fig. 1.6: Antenna connectors

An antenna can be connected to RipEX2 via TNC female 50Ω connector.

RipEX2 is equipped with two connectors. The Tx/Rx connector will be used for common transmitting and receiving single antenna installation (even with different Rx and Tx frequencies).

Both Rx and Tx/Rx connectors for split installation (two antennas or duplex operation with duplexer) – Rx for receiving and Tx/Rx for transmitting.

Warning: RipEX2 radio modem may be damaged when operated without an antenna or a dummy load.

1.2.2. 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 RipEX2. 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. 1.1: Pin assignment

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

  • max. 30VDC

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

  • max. 30VDC

open drain output max. 30 VDC, 1 A
6++ POWER (10 to 30 V)
Undervoltage threshold 8.5 VDC
Overvoltage threshold 41 VDC

Pins 3 and 7 are connected internally.
Pins 4 and 6 are connected internally.

Supply connector

Fig. 1.7: Supply connector

Power and Control - cable plug

Fig. 1.8: 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. This alarm can be used for example to transmit information using SNMP Notification, informing for instance about a power outage or RTU problem. For details about Alarm management see chapter Advanced Configuration.


HW ALARM OUTPUT is a digital output. It can be activated in Alarm management settings, chapter Advanced Configuration. It may be used for instance to inform the connected RTU about a RipEX2 alarm or about the Unit ready status. If an alarm is triggered, HW ALARM OUTPUT is internally connected to GND. If the external device requires connection to positive terminal of the power supply, PIN 4 should be used.


The POWER pins labelled + and – serve to connect a power supply 10–30 VDC. The requirements for a power supply are defined in and Chapter 6, Technical parameters.

1.2.3. ETH1 – ETH4

Standard RJ45 connectors for Ethernet connection. RipEX2 has 10/100 BaseT Auto MDI/MDIX interfaces so it can connect to 10 Mbps or 100 Mbps Ethernet network. The speed can be selected manually or recognized automatically by RipEX2. RipEX2 is provided with Auto MDI/MDIX function which allows it to connect over both standard and cross cables, adapting itself automatically.

Pin assignment

Tab. 1.2: 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

1.2.4. ETH5 (SFP)

SFP slot

Fig. 1.9: SFP slot

ETH5 is a standard SFP slot for 10/100/1000 Mbps Ethernet SFP modules, user exchangeable. 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 RipEX2 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 RipEX2 units. It is possible to use any other SFP module, but RACOM cannot guarantee they will be completely compatible with RipEX2 units.

1.2.5. COM

RipEX2 provides serial interface COM terminated by DSUB9F connectors It can be configured as RS232 or RS485 (more in Adv. Conf., COM).

RipEX2‘s RS232 is a hard-wired DCE (Data Communication Equipment) device. Equipment connected to the RipEX2’s serial port should be DTE (Data Terminal Equipment) and a straight-through cable should be used. If a DCE device is connected to the RipEX2‘s serial port, a null modem adapter or cross cable has to be used.

RipEX2‘s RS485 is not galvanic isolated and it is not terminated.

Tab. 1.3: COM pin description

pinsignalIn/ OutsignalIn/ Out
2RxDOutline BIn/Out
3TxDInline AIn/Out

RipEX2 keeps pin 6 DSR at the level of 1 by RS232 standard permanently.

1.2.6. USB

RipEX2 uses USB 3.0, Host A interface. USB interface is wired as standard:

Tab. 1.4: 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 RipEX2, for more details see Section 3.3, “Connecting RipEX2 to a programming PC”. The adapters are used for service access to RipEX2’s web configuration interface.

The USB interface can also be used for an external flash disc connection, which has been specifically designed to simplify complex maintenance tasks, so that these tasks can be performed by unqualified personnel in the field by simple plugging-in an USB stick and waiting until a LED flashes.

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.

External USB flash disc

An external USB flash disc can be used for firmware upgrade, SW keys upload, configuration backup and restore, ssl certificate and ssh keys upload and tech-support package download. Any common USB stick with several megabytes of free space can be used for these tasks.

1.2.7. AUX

AUX connector SMA

Fig. 1.10: AUX connector SMA

AUX SMA female 50 Ohm connector is used for several purposes according to HW variant.

Standard basic model – the AUX is used as an synchronization signal input.

Input frequency range 1Hz (PPS) – 25 MHz

Input signal level >200 mVp-p @ 220R, up to 5V TTL levels

RipEX2 can be equipped with an internal GPS. The GPS module is used for time synchronization of the NTP server inside RipEX2. See Adv. Conf., Time for more. In this case the AUX connector serves for connecting the GPS antenna:

  • active antenna

  • 3.3 VDC supply


1.2.8. DI/DO

Tab. 1.5: Digital Inputs and Outputs


Differential digital input – Positive – (P)


Differential digital input – Negative – (N)


Digital Output 1


Digital Output 2


Digital Input 1


Digital Input 2

  • Digital Outputs:

    • Open drain output max. 30 VDC, 0.2A

  • 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 30 V

  • Digital inputs:

    • Schmitt-triggered inverted input

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

    • Max. 30 VDC

1.2.9. HW button

HW button

Fig. 1.11: HW button

HW button is placed on the right side of COM interface.

1.3. Indication LEDs

Indication LEDs

Fig. 1.12: Indication LEDs

Tab. 1.6: Key to LEDs

SYSGreenPermanently litSystem OK
Flashing – period 500msReset button pushed
One fast (50ms) flash – pause (500 ms)Reset button to reset
Three fast (50ms) flashes – pause (500ms)Reset button factory reset
Flashing – period 1 secSave mode
Flashing – period 3 secSleep mode
RedPermanently litAlarm
Flashing regularly – period 500msSerious system error
OrangePermanently litUnit is starting
Three fast (50ms) flashes – pause (500 ms)USB attached
Flashing – period 100 msSkip go to sleep mode, boot normally
Flashing regularly – period 500 msFirmware writing in progress
AUXGreenPermanently litActivity
RedPermanently litAlarm
RxGreenPermanently litReceiver is synchronized to a packet
YellowPermanently lit, or flashing in 1 sec
Rx mode of operation – high resistence (strong interfering signals – above -45 dBm – are present within the frequency band), adaptive mode of receiver operation
TxRedPermanently litTransmitting to radio channel
Greenno functionno function
COMGreenPermanently litData receiving
YellowPermanently litData transmitting


– is “On” when any controlled item in Alarm management, (see Adv. Conf., Alarm management for more) is in alarm status (out of thresholds) and “SNMP Notification”, “HW Alarm Output” or “Detail graphs start” for any line in the Alarm configuration table are checked.

Adaptive mode of receiver operation

Cognitive function of receiving mode selection is implemented in RipEX2. When exposed in a radio environment where strong interfering signals (stronger than -45 dBm) are present, RipEX2 senses them and adaptively increases its resistence to interference ( and lower its sensitivity by 3dB). When intereference holds, RipEX2 stays in high resistence mode of receiver operation and signals this state by turning the yellow RX LED on. Once the interfering signals fade away, RipEX2 automatically returns to its high sensitivity mode of receiver operation.

1.4. Ordering codes

RipEX radio modem has been designed to have minimum possible number of hardware variants. Different HW models are determined by frequency, internal GPS and separate connectors for RX and TX antennas.

Upgrade of functionality does not result in on-site hardware changes – it is done by activating software feature keys (see chapter RipEX in detail and Adv. Config., Maintenance).

All ordering codes are avaiable on Racom website. See