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4. Product

4.1. Dimensions

Dimensions in millimeters

Fig. 4.1: Dimensions in millimeters

4.2. Connectors

4.2.1. Antenna SMA

Antenna connectors SMA

Fig. 4.2: Antenna connectors SMA

MG102i uses SMA antenna connectors:

  • Mob 1, Mob 2 for GSM/UMTS/LTE antenna connection (Mob 1 for 1st UMTS module, Mob 2 for LTE as auxiliary second connector or for 2nd UMTS),

  • GPS for GPS active or passive antenna,

  • WLAN 1 and WLAN 2 for WiFi Antenna (WLAN 2 as auxiliary).


4.2.2. Eth RJ45

Eth RJ45 Plug - pin numbering

Fig. 4.3: Eth RJ45 Plug – pin numbering

Tab. 4.1: Pin assignment Ethernet interface

RJ-45 SocketETH (Ethernet 10BaseT and 100BaseT)






4.2.3. USB

MG102i uses USB 1.1, Host A interface. USB interface is wired as standard:


USB connector

Fig. 4.4: USB connector

Tab. 4.2: USB pin description

USB pinsignalwire
1+5 Vred
2Data (−)white
3Data (+)green

4.2.4. Screw terminal

Screw terminal plug type Stelvio Kontek CPF5/15 or MRT3P/15V01 can be used.

Screw terminal

Fig. 4.5: Screw terminal

Tab. 4.3: Pin assignment of screw terminal

pinpin descriptionsignal
1VGNDGround internally connected with casing ground.
2V+ (12–48 V=)Dual power input – not connected with pin 4: 12–48 VDC (–15% +20%) = 10.2–57.6 VDC.
3RxDRS232 – RxD (receiving data)
4TxDRS232 – TxD (transmitting data)
5GNDRS232 – GND (ground)
6DO1:Digital output. Dry contact relay. Normally open with MG102i without powering.
8DO2:Digital output. Dry contact relay. Normally open with MG102i without powering. See Section 7.2.7, “Digital I/O” for details.
10DI1−Digital input 1 See Section 7.2.7, “Digital I/O”
11DI1+Digital input 1
12DI2−Digital input 2
13DI2+Digital input 2

Tab. 4.4: Digital inputs levels

logical level 00 to 5.0 VDC
logical level 17.2 to 40 VDC
Note: Negative input voltage is not recognised.

Tab. 4.5: Digital outputs parameters

Maximal continuous current1 A
Maximal switching voltage60 VDC, 42 VAC (Vrms)
Maximal switching capacity60 W

Tab. 4.6: Voltage Polarity connector misconnection Risks

pinpin description Plug pos. Plug pos. Plug pos. Plug pos.
2V+ (12–48 V=)+Nde+OK
3RxDDp [1]+Dp [1]+
4TxD+Dp [1]+Dp [1]
6DO1-1+Nde [2]+Nde [2]
8DO2-1+Nde [3]+Nde [3]
10DI1−+OK [4]+Nde [4]
12DI2−+OK [4]+Nde [4]
13DI2+    +

Explanatory notes for the table:
OK   – Normal operation
DP   – Damage possible
Nde  – No damage expected

[1] – If the applied voltage is > 15 V, damage is likely
[2] – If the relay is closed (normally open), the relay is damaged when current > 5 A
[3] – If the relay is closed (normally closed), the relay is damaged when current > 5 A
[4] – If the applied voltage is > 40 V, input circuit damage is likely

4.2.5. Reset button

Reset button

Fig. 4.6: Reset button

The Reset button is placed close to the SIM holders and it is labeled “Reset”. Use a blunt tool with 1 mm in diameter (e.g. paper clip) to press the button.

Keep it pressed for at least 3 seconds for reboot and at least 10 seconds for a factory reset. The start of the factory reset is confirmed by all LEDs lighting up for one second. The button can be released afterwards.


If the button is being pressed at least 15 seconds until all LED diodes blink red, the recovery procedure is started. The recovery image can be provided on demand and a special procedure utilizing the TFTP transfer from your computer is required. Contact our technical support team for more details.



4.3. Indication LEDs

Indication LEDs

Fig. 4.7: Indication LEDs

Tab. 4.7: MG102is interfaces and status indicators

Statusgreen blinkingStart up, maintenance
green onReady (upper side banks description)
orange onReady (lower side banks description)
orange blinkingInsufficient power supply
blinkingMobile connection is being established
onMobile connection is up
greenExcellent GSM signal
orangeMedium GSM signal
redWeak GSM signal
VPNgreen onVPN connection is up
green blinkingVPN connection is being established
WLANblinkingWLAN connection is being established
onWLAN connection is up
red /orange / greenWeak / Medium / Excellent WLAN signal
GPSblinkingGPS is turned on, but a valid NMEA stream is not yet available
onGPS is turned on and a valid NMEA stream is available
offGPS is turned off and a valid NMEA stream is available
VoiceonA voice call is currently active
offNo voice call is active
   If lower side banks displayed
DI1onInput set
offInput not set
DI2onInput set
offInput not set


For Releases newer or equal to

Tab. 4.8: RSSI

  or more
-61 to -81-83 to -91-93 to -101-103 to -107-109 to -111-113
  or less
  or more
-70 to -84-86 to -94-96 to -104-106 to -110-111 to -114-116
  or less
  or more
-50 to -79-80 to -89-90 to -104-105 to -110-111 to -117-118
  or less

Tab. 4.9: ASU

GSM 27 or more26 to 1615 to 1110 to 65 to 32 to 10
UMTS24 or more23 to 1615 to 1110 to 65 to 32 to 10
LTE71 or more70 to 4140 to 3130 to 1615 to 109 to 32 or less

Tab. 4.10: LED Colour

Signal Level [%] 71 or more70 to 3534 to 0

WLAN Link Quality and LED colour

For Releases newer or equal to

Tab. 4.11: LED Colour

WLAN Signal Quality [%]90 or more89 to 7069 to 5049 to 3534 to 2019 to 0

For LED description used in older firmware versions, see the previous manual version at

4.4. Technical specifications

Tab. 4.12: Technical specifications

Mobile Interface
WCDMA, HSDPA, HSUPA, HSPA+ (3G): B1(2100), B2(1900), B5(850), B8(900)
GSM (2G): B2(1900), B3(1800), B5(850), B9(900)
Data rates: max. 14.4 Mbps Downlink / 5.76 Mbps uplink
Mobile Interface
LTE (4G): B1(2100), B2(1900), B3(1800), B5(850), B7(2600), B8(900), B20(800), all bands withs diversity
WCDMA, HSPA, HSPA+ (3G): B1(2100), B2(1900), B5(850), B8(900), all bands withs diversity
GSM (2G): B2(1900), B3(1800), B5(850), B9(900)
Data rates up to 100 Mbps downlink / 50 Mbps uplink
Ethernet5× Ethernet 10/100 Base-T, Auto MDX, 5× RJ45, bridged or routed
Serial Interface1× 3-wire RS232 on 13-pin screw terminal block
Digital I/O2 digital inputs
0–5.0 VDC level 0
7.2–40 VDC level 1, maximum voltage 40 VDC
2 digital outputs
Relay outputs 1st NO, 2nd NC
Limiting continuous current 1 A
Max. switching voltage 60 VDC, 42 VAC (Vrms)
Max. switching capacity 60 W on 13-pin terminal block
USB service interface
USB host interface supporting memory devices
USB type A connector
Antenna InterfacesImpedance:50 Ω
Connector:SMA female
Power SupplyInput voltage:10.2–57.6 VDC (12–48 VDC –15 % / +20 %)
Power consumption:
Rx max. 1.9 W
Tx max. 6 W
Environmental Conditions
For indoor use only, IP40
Metal casing, DIN rail mounting kit included
Temperature range UMTS/WLAN:–25 to +70 °C (–13 to +158 °F)
Temperature range LTE:–25 to +60 °C (–13 to +140 °F)
Humidity:0 to 95 % (non condensing)
MTBF (Mean Time Between Failure)> 220.000 hours (> 25 years)
Vibration and shock hardening 
MountingFlat mounting
Dimensions / Weight190 W × 104 D × 40 H mm (7.48 × 4.09 × 1.57 in), ca. 610 g (1.35 lb)
Type ApprovalCE, FCC
3G or LTE model 
GPS SW keyIntegrated GPS receiver with NMEA0183 data stream
Supported passive or active GPS antenna, SMA female connector
WLANIntegrated Wi-Fi 802.11 a/b/g/n client, Wi-Fi 802.11 b/g/n server for max. 128 clients
Antenna SMA female, antenna diversity
Voice Gateway SW keyVoIP to GSM gateway
Mobile IP SW keyMobile IP VPN tunnel
Server LicenseExpansion SW key for increasing OpenVPN clients from 10 to 25 and other features (see table Server extension).
AntennasVarious antennas suitable for your application are available
Mounting kitDIN rail bracket

4.5. Models offerings

Ordering code (Part No’s)

Trade name:


Type (according internal module(s)):

MG102i-U, MG102i-L, MG102i-2U

Code (according to next HW modules):

e.g. MG102i-UW

MG102i – XXyy – zzz

XX – module type


yy – HW modules


– basic model (no HW module)


– Wifi (Wireless Local Area Network) internal module (Part No. MG102i-HW-WLAN)
The WLAN module for MG102i-2U or MG102i-L has to be always ordered together with the GPS SW feature key.

zzz – SW feature keys


– empty no SW feature key


– GPS receiver (Part No. MG102i-SW-GPS)


– MobileIP VPN tunnel option – see for short explanation. (Part No. MG102i-SW-Mobile IP)


– Server extension
(Part No. MG102i-SW-Server Ext.)

FeatureStandardServer extension
DHCP reservations1035
Local host names1035
Napt rules2035
Firewall rules2035
Firewall address groups1015
OpenVPN clients1025
Static routes1030
Mobile IP
DynDNS server

– Voice Gateway – receive VoIP packets from LAN and change it to calls to the GSM/UMTS network and transform calls incoming from mobile network to the VoIP packets into the LAN. (Part No. MG102i-SW-VoIP)

Code examples:

MG102i-U = UMTS
MG102i-L(G) = LTE+GPS
MG102i-LW(G)(S) = LTE + WLAN + GPS + Server extension

4.6. Accessories

4.6.1. DIN rail bracket

DIN rail bracket

Fig. 4.8: DIN rail bracket

MG102i with DIN rail bracket

Fig. 4.9: MG102i with DIN rail bracket

DIN rail bracket

Installation bracket for DIN rail mounting. For usage details see chapter Mounting and chapter Dimensions.