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Damage to the device due to incorrect handling of the SIM card!

Only insert the SIM card when the device is in a voltage-free state. 

Make sure that no SMS messages are stored on the SIM card by inserting the 

card into a mobile phone.

Possible damage to the SIM card due to improper handling!

Do not touch the contacts on the SIM card.

Blocking of the SIM card if another SIM card was previously used in the 

device! 

First load a project with the PIN of the new SIM card into the device to 

avoid blocking the new SIM card. 

Unlock the drawer for the SIM card: To do this, press the small button to the right of the drawer 

using a pen or a pointed object.
Pull out the drawer carefully. Insert your SIM card.
Slide the drawer back into the device until it clicks into place.

For your safety

FP InovoLabs GmbH

Prenzlauer Promenade 28

13089 Berlin, Germany

Tel49 (0)30 220 660 601
E-mail

info@inovolabs.com

Website

www.inovolabs.com

FP S-OTGuard

Installation instructions

51.0071.9003.

01  R

ev. 03 /

 2021-02 /

 xxx / helbig berli

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Installation

Connecting the mobile radio antenna 

(model dependent)

Inserting the SIM card 

(model dependent)

Before you start working on FP S-OTGuard

Please read the enclosed leaflet “For your safety” carefully before installing and operating a 

device. Make sure that you have understood all instructions.
This document describes in short form the installation and start-up of FP S-OTGuard devices. For 

further information, please read the hardware manual 

(Download at https://www.inovolabs.com/infobereich/downloads/handbucher-datenblatter).

Target group

This document is intended exclusively for qualified electricians who are familiar with the safety 

standards of electrical and automation engineering. Project planning, installation, start-up, main-

tenance and testing of the FP S-OTGuard devices may only be carried out by a recognised quali-

fied electrician.

Danger from electrical voltage and incalculable behaviour! 

Any interventions in the hardware and software, unless they are described in 

these installation instructions or in the hardware manual, may only be carried 

out by qualified personnel provided by the manufacturer.

Installation site

Danger to life from explosion!

 Sparks can cause explosion and fire! Do not 

use the device in a potentially explosive environment or in the vicinity of flam-

mable gases, vapours, dust or conductive dusts.

Possible damage to the device by external influences! 

Only use the device in dry and clean spaces.

Protect the device from moisture, water spray, heat and direct sunlight.

Do not expose the device to strong shocks or vibrations.

Installation on a DIN rail 

Danger from electrical voltage! 

Make sure that the lines to which the device is connected are voltage-free. 

Before starting assembly and installation tasks, disconnect the cables from the 

power supply and secure them against being switched on again.

Mount the device by sliding or snapping it onto a DIN rail (35 mm × 7.5 mm | 1.4" × 0.3", according 

to EN 50022). 

Vertical or horizontal installation is possible. 

Warning: In a residential environment this equipment may cause radio interference.

Connecting peripherals

The mobile radio antenna is not included. You can order these as accessories from FP InovoLabs. 

A list of available antennas can be found in the hardware manual. 

Signal strength

First find a suitable location for the antenna outside the electrical cabinet. To find a suitable location 

with good reception, the operating software can be used to display the reception quality.
For reliable data connections (for remote parametrisation, Internet dial-up) the signal strength 

should be at least -77 to -53 dBm. 
In the range from -95 to -79 dBm, SMS still works in most cases, but the connections often break 

down. No operation is possible below -97 dBm.
Use an antenna with high antenna gain if the signal strength at the receiving location is too low. 

Connection to FP S-OTGuard

Screw the antenna or antenna cable into the corresponding antenna socket on the FP S-OTGuard 

housing. 

Please read the hardware manual to connect the periphery intended for the application. 

Connecting to the power supply

Danger from electrical voltage! 

Make sure that the lines to which the device is connected are voltage-free. Before 

starting assembly and installation tasks, disconnect the cables from the power 

supply and secure them against being switched on again.

After completing all other installation work, connect FP S-OTGuard to the power supply. 

Damage to the device due to incorrect voltage connection!

Ensure the correct polarity of the voltage connections and adherence to the 

characteristic values U = 10 - 30 V DC/models with M-Bus: U = 18 - 30 V DC.

Inadequate power supply due to insufficient conductor cross-section!

Only use cables with sufficient conductor cross-section for connection. 

Damage to the connection terminals due to excessive torque!

Use a torque screwdriver. Tighten the clamping screws to a torque of 

0.5 Nm (0.37 ft lb). 

Connect the connection cables to the screw terminals. 

Tighten the clamping screws to a torque of 0.5 Nm 

(0.37 ft lb).
Note: To avoid interference from power supply units or 

other sources of interference, do not lay the DC cables in 

the immediate vicinity of AC cables. 

Operation with SD card 

(model dependent)

Start-up

When all installation steps are completed, the device can be put into operation. Switch on the 

supply voltage. 

Self-test

 

After applying the operating voltage, the device carries out an extensive self-test. All LEDs are 

switched on once for checking and the memories are checked.
 

As soon as the device is ready for operation, an acoustic signal is emitted. The yellow Power LED 

lights up.
FP S-OTGuard must still be configured for operation. Software tools for this can be purchased 

from FP InovoLabs. 

Power

Data out/Process

Line

LAN

Mode Remarks

Load firmware, check checksum

 + 

 

(flashes)

 

Unpacking of the firmware
Launching the kernel
Launching the Linux application
All LEDs off for approx. 5 s

 

(flashes)

 

 

(flashes)

 

 

(flashes)

 

Multiple simultaneous flashing of Data 

Out/Line/LAN

Only use an SD or MMC card with a maximum of 32 GB memory for FP S-OTGuard. Format the 

card under Windows (FAT or FAT32).

Inserting the SD card

 

Insert the formatted card into the slot marked “SD Card” (printed side visible and contacts first). 

If FP S-OTGuard is ready for operation, the card is automatically activated after insertion.

Removing the SD card

 

Press the “SD Unmount” button for max. 1 second. 

Wait until the “Active” LED goes out. All read and write operations are then completed. 

Push the SD card a little further into the card slot and let go. The card is released. You can remove 

the card. 

Communication with an PLC 

FP S-OTGuard supports communication with a number of programmable logic controllers (PLC) 

as standard. The list of supported controllers and important notes on connection to FP S OT-

Guard can be found in the hardware manual. 

The Modbus fieldbus system (RTU, ASCII and TCP) is also available.

For further information, please visit us online at www.inovolabs.com. 

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