Lambrecht Ser[LOG] User manual

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 1 of 129
Ser[LOG]
Operator’s Manual · Version 17.21
From firmware: 1.200
LAMBRECHT meteo GmbH · Friedlaender Weg 65-67 · 37085 Goettingen
Phone: [phone] · E-Mail: [e-mail]

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 2 of 129
Chapter Overview
Page
1Description Ser[LOG]..................................................................................................10
2Wiring - Device Connection........................................................................................17
3Display Menu ...............................................................................................................26
4General Operation of the Ser[LOG]-Commander ......................................................32
5Commissioning / basic configuration........................................................................40
6IP Communication.......................................................................................................69
7Configuration of the switching outputs and alarms .................................................80
8Configuration of wind data processing .....................................................................88
9SDI-12 Dialogue - Tool ................................................................................................89
10 Firmware Update......................................................................................................90
11 Other functions - USB stick readout ......................................................................91
12 Managing the safety settings..................................................................................92
13 Connection diagrams ............................................................................................100
14 Supported serial protocols ...................................................................................108
15 List of predefined sensors ....................................................................................111
16 Jumper field terminating resistor and interface driver RS485 / RS422 .............117
17 Warranty.................................................................................................................119
18 Change history.......................................................................................................120
19 Ser[LOG] sensor assignment ...............................................................................121
20 ASCII character table.............................................................................................126
21 Technical data........................................................................................................127
22 Disposal..................................................................................................................129

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 3 of 129
© Copyright 2017-2021 by LAMBRECHT meteo GmbH, Germany
Copyright & Disclaimer
All information published in this manual’s contents is subject to copyright and other laws for protection
of intellectual property. The use, storage, modification, copying and distribution of any content require
our prior written consent.
All brand and product names mentioned in this manual are registered trademarks and property of their
respective owners.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 4 of 129
Contents
Page
1Description Ser[LOG]..................................................................................................10
1.1 Description Ser[LOG] for serial sensors................................................................................ 12
1.2 Description AnDiMod · Measurement module for analogue / digital sensors ....................... 15
1.3 Description Ser[LOG]Plus · Combined logger for serial, digital and analogue sensors ....... 16
2Wiring - Device Connection........................................................................................17
2.1 Supply voltage ....................................................................................................................... 17
2.2 Connection - Serial devices................................................................................................... 17
2.2.1 Terminal - apparatus with RS485 interface and Modbus RTU........................................ 17
2.2.2 Special case - Sensors with RS485 interface in talker mode RS422.............................. 18
2.2.3 Connection - devices with RS422 interface..................................................................... 18
2.2.4 Special case sensors with RS422 interface in talker mode on RS485............................ 19
2.2.5 Connection – Sensors with SDI-12-Interface .................................................................. 19
2.2.6 Connection - Modem with RS232 interface ..................................................................... 20
2.2.7 Connection - PC with RS232 interface ............................................................................ 20
2.3 Connection of analogue sensors........................................................................................... 21
2.3.1 Connection - Sensors with voltage signal........................................................................ 21
2.3.2 Connection - Sensors with current signals (0/4...20mA) ................................................. 21
2.3.3 Connection - Resistance measurement Pt100, Pt1000, potentiometer .......................... 22
2.4 Connection of digital sensors ................................................................................................ 22
2.4.1 Connection - Sensors with status signals ........................................................................ 22
2.4.2 Connection - Sensors with pulse signals (counter) ......................................................... 23
2.4.3 Connection - Sensors with frequency signals.................................................................. 23
2.5 Connection terminals for the supply of sensors .................................................................... 23
2.6 Connection - Relay outputs ................................................................................................... 24
2.7 Connection - AnDiMod Module.............................................................................................. 24
3Display Menu ...............................................................................................................26
3.1 Realtime Values .................................................................................................................... 26
3.2 Data Export............................................................................................................................ 27
3.3 Config Import via USB stick................................................................................................... 27
3.4Firmware Update ................................................................................................................... 28
3.5 Bluetooth ON ......................................................................................................................... 29
3.6 INFO ...................................................................................................................................... 29

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 5 of 129
3.7 Display Off ............................................................................................................................. 31
4General Operation of the Ser[LOG]-Commander ......................................................32
4.1 Safety properties for Ser[LOG] and Ser[LOG]_Cmd ............................................................. 33
4.2 Configuring the "Ser[LOG] function"...................................................................................... 34
4.3 Function „Tools“..................................................................................................................... 37
4.4 Function „Display instantaneous values“............................................................................... 37
4.5 Function “Retrieve measured values“ ................................................................................... 38
4.6 Function “Display measurement data“ .................................................................................. 38
4.7 Function “Graphical display of measured values” ................................................................. 38
4.8 Function “Sensor definition“................................................................................................... 39
4.9 Function “Actuator definition“................................................................................................. 39
4.10 Other functions ...................................................................................................................... 40
5Commissioning / basic configuration........................................................................40
5.1 Connecting sensors............................................................................................................... 40
5.2 Connecting to the supply voltage .......................................................................................... 40
5.3 Configuration of the Ser[LOG]............................................................................................... 41
5.3.1 Basic Station Configuration ............................................................................................. 41
5.3.1.1 Configuration via Mini-USB Service Interface......................................................... 41
5.3.1.2 Configuration via USB Bluetooth stick .................................................................... 42
5.3.1.3 Create new configuration ........................................................................................ 42
5.3.2 Activating AnDiMod Extension Modules.......................................................................... 43
5.3.3 Setting the measured value acquisition........................................................................... 43
5.3.3.1 Setting instantaneous values as 3-second moving averages................................. 44
5.3.4 Interface configuration for measured value retrieval and remote configuration .............. 44
5.3.4.1 Communication via network / Internet (TCP/IP) ..................................................... 44
5.3.4.2 Communication via serial interface RS232 / RS485 / RS422................................. 45
5.3.5 Configuration of the sensors............................................................................................ 45
5.3.5.1 Configuration Global Radiation Sensors................................................................. 47
5.3.5.2 Configuration of a pair of vectorially linked wind sensors ....................................... 47
5.3.5.3 Configuration serial sensors ................................................................................... 47
5.3.5.3.1 Configuration of the serial interface for sensors......................................... 47
5.3.5.3.2 Setting the data retrieval interval for SDI-12, Modbus RTU and Modbus
TCP sensors........................................................................................................................ 48
5.3.5.3.3 Assignment of serial sensors to the measurement channels................... 49
5.3.5.3.4 Assignment of SDI-12 sensors to the measurement channels................ 49

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 6 of 129
5.3.5.3.5 Assignment of Modbus RTU sensors to the measurement channels..... 49
5.3.5.3.6 Assignment of Modbus TCP sensors to the measurement channels ..... 50
5.3.5.3.7 Assignment of virtual sensors to the measurement channels.................. 50
5.3.5.4 Configuration of sensors with look-up table ............................................................ 51
5.3.5.5 Creating new sensors ............................................................................................. 51
5.3.5.5.1 Channel type - Analog.................................................................................... 54
5.3.5.5.2 Channel type - Status..................................................................................... 56
5.3.5.5.3 Channel type – Digital .................................................................................... 57
5.3.5.5.4 Channel type - Modbus .................................................................................. 58
5.3.5.5.5 Channel type - SDI-12.................................................................................... 59
5.3.5.5.6 Channel type - Serial (e. g. NMEA) .............................................................. 59
5.3.5.5.7 Channel type - Virtual ..................................................................................... 61
5.3.5.5.8 Special function for sensor definition ........................................................... 62
5.4 Displaying instantaneous values ........................................................................................... 63
5.4.1 Standard instantaneous value display ............................................................................. 63
5.4.2 Display of the current electrical raw values ..................................................................... 64
5.4.3 Instantaneous value display via UDP .............................................................................. 64
5.4.4 Display of moving wind data ............................................................................................ 65
5.4.5 Error messages of the instantaneous values .................................................................. 65
5.5 Recalling and saving measured values................................................................................. 66
5.6 Display measurement data.................................................................................................... 67
5.7 Display measurement data graphically ................................................................................. 67
6IP Communication.......................................................................................................69
6.1.1.1 Synchronization of the clock via NTP ..................................................................... 70
6.1.1.2 Data Transfer via FTP - Ser[LOG] as FTP Client ................................................... 70
6.1.1.3 Transmission of measured values via Email / Email alarm .................................... 72
6.1.1.4 Setting the Export Format for FTP and Email......................................................... 73
6.1.1.5 Ser[LOG] & SYNMET_IIA – Neue Features MQTT & HTTPS Post ....................... 74
6.1.1.6 Settings MQTT ........................................................................................................ 74
6.1.1.7 Settings HTTPS Post .............................................................................................. 75
6.1.1.8 Data Record Setup Logger Configuration (MQTT / HTTPS Post).......................... 77
6.1.1.9 Settings for IP communication via mobile radio modem......................................... 78
6.1.1.10 Setting SMS alarm .................................................................................................. 79
7Configuration of the switching outputs and alarms .................................................80

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 7 of 129
7.1 Process control ...................................................................................................................... 81
7.2 Cycle control .......................................................................................................................... 81
7.3 Error monitoring ..................................................................................................................... 83
7.4 Area monitoring ..................................................................................................................... 84
7.4.1 Simple area monitoring (OR operation) ........................................................................... 84
7.4.2 Group-related area monitoring (AND operation) ............................................................. 85
7.5 Modbus relay ......................................................................................................................... 86
7.5.1 Definition of new Modbus relays...................................................................................... 87
8Configuration of wind data processing .....................................................................88
9SDI-12 Dialogue - Tool ................................................................................................89
10 Firmware Update......................................................................................................90
11 Other functions - USB stick readout ......................................................................91
12 Managing the safety settings..................................................................................92
12.1 Register user accounts.......................................................................................................... 93
12.2 Register “Password guidelines“............................................................................................. 94
12.3 Register Hardware-Software Fusion Key .............................................................................. 95
12.4 Setting the logger safety register........................................................................................... 96
12.5 Activating the logger safety ................................................................................................... 99
12.6 Deactivating the safety settings............................................................................................. 99
13 Connection diagrams ............................................................................................100
13.1 Overview - Terminal assignment Ser[LOG]Plus.................................................................. 100
14 Supported serial protocols ...................................................................................108
14.1 NMEA .................................................................................................................................. 108
14.2 RPT350................................................................................................................................ 108
14.3 PTB330................................................................................................................................ 108
14.4 LDWHM_12 ......................................................................................................................... 108
14.5 LD-40 ................................................................................................................................... 108
14.6 CL31 msg 2_base ............................................................................................................... 108
14.7 FS11 .................................................................................................................................... 108
14.8 rain[e] 'SDI-12 on RS485' .................................................................................................... 109
14.9 Pluvio 1 DWD ...................................................................................................................... 109
14.10 Pluvio 2 ‘M Command’................................................................................................... 109
14.11 X81................................................................................................................................. 109
14.12 VFP-730 ‘compressed format’ ....................................................................................... 109
14.13 15189 'SDI-12 on RS485' .............................................................................................. 109

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 8 of 129
14.14 LPM Distrometer ‘Tel. 6’ ................................................................................................ 109
14.15 Modbus Sensor.............................................................................................................. 109
14.16 SDI-12 (only COM5) ...................................................................................................... 109
14.17 SNAP ............................................................................................................................. 110
14.18 GPRS PPP..................................................................................................................... 110
14.19 Modbus Actuator / Actor ................................................................................................ 110
14.20 Ser[LOG] – AnDiMod-Bus (only COM6)........................................................................ 110
15 List of predefined sensors ....................................................................................111
15.1 Predefined status sensors ................................................................................................... 111
15.1.1 Standard status sensors............................................................................................ 111
15.1.2 LAMBRECHT status sensors .................................................................................... 111
15.2 Predefined digital sensors ................................................................................................... 111
15.2.1 Standard digital sensors ............................................................................................ 111
15.2.2 LAMBRECHT digital sensors .................................................................................... 111
15.3 Predefined analog sensors.................................................................................................. 112
15.3.1 Standard analog sensors .......................................................................................... 112
15.3.2 LAMBRECHT analog sensors................................................................................... 112
15.4 Available serial sensors....................................................................................................... 114
15.4.1 LAMBRECHT serial sensors ..................................................................................... 114
15.4.2 LAMBRECHT SDI-12 sensors .................................................................................. 114
15.4.3 LAMBRECHT Modbus sensors................................................................................. 114
15.4.4 NMEA sensors........................................................................................................... 114
15.4.5 Additional serial sensors (proprietary)....................................................................... 115
15.4.6 Virtual sensors........................................................................................................... 116
15.4.7 Virtual Sensors - Special Function Redundancy....................................................... 116
16 Jumper field terminating resistor and interface driver RS485 / RS422 .............117
16.1 Switching the COM2 to COM6 from RS485 to RS422 ........................................................ 118
16.2 Adding terminating resistors for RS485 or RS422 .............................................................. 118
17 Warranty.................................................................................................................119
18 Change history.......................................................................................................120
19 Ser[LOG] sensor assignment ...............................................................................121
19.1 Sensor assignment - AnDiMod or Ser[LOG]Plus analog section........................................ 122
19.2 Sensor assignment - AnDiMod or Ser[LOG]Plus analog section........................................ 123
19.3 Sensor assignment - AnDiMod or Ser[LOG]Plus analog section........................................ 124
20 ASCII character table.............................................................................................126

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 9 of 129
21 Technical data........................................................................................................127
22 Disposal..................................................................................................................129

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 10 of 129
1 Description Ser[LOG]
The Ser[LOG] system family is a universal, scalable data acquisition, data processing and communica-
tion platform for professional meteorological data collection.
The Ser[LOG] can detect measured values via its serial 6 (isolated) interfaces and the Ethernet inter-
face.
Implemented protocols:
•SDI-12
•Modbus RTU
•Modbus TCP
•NMEA
•Various proprietary telegrams for various sensors, for example for measuring
oAir pressure
oVisibility
oCloud height
oPrecipitation
In addition, the Ser[LOG] has two digital status inputs and two relay outputs. A service interface is avail-
able in the form of a mini-USB port. To the USB Host (2.0), memory stick for data export and selected
Bluetooth stick can be used as a wireless service interface. Both via the Bluetooth stick or via the
memory stick configurations and firmware updates can be transferred.
The Ser[LOG] can be extended by additional AnDiMod 1-3 measurement modules. Each AnDiMod in-
cludes 12 differentially measured analogue and 3 digital channels. The AnDiMod 1-3 modules differ in
their addresses on the Ser[LOG] bus. Upon expansion the sequence of AnDiMod 1-3 must be complied
with.
Up to 3 AnDiMod can be connected to a Ser[LOG]. Thereby, above the channels added via the serial
interfaces and virtual channels, the Ser[LOG] can be extended with up to 36 analogue and 11 digital
channels. A maximum of 60 channels are supported, wherein each respective channel corresponds to
one measured parameter. The Ser[LOG]Plus already includes an AnDiMod module with the address 1
in its housing and can be extended by 2 more AnDiMod modules (address 2 and 3) each extension
offering up to 36 analogue and 11 digital channels.
Ser[LOG] Data logger for serial sensors
AnDiMod Measurement module for analogue and digital sensors
Ser[LOG]Plus Combined device Ser[LOG] and 1x AnDiMod in one housing

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 11 of 129
The configuration of the Ser[LOG] takes place with the "Ser[Log] Commander". This application has a
sensor library from which the channels of the Ser[LOG] can be easily and quickly assigned by "point
and click" with sensors from the LAMBRECHT product range. In addition, users can add their own sen-
sors and thus extend the sensor library.
Virtual channels like dewpoint calculation or reduction of air pressure can be defined from the existing
formula collection or by the formula interpreter.
Regardless of the configuration and the storage interval, the Ser[LOG] stores all measurement values
in a ring buffer, which holds data for exactly 1 year. After that, the oldest value is overwritten.
With the MeteoWare CS4 the data collected can be conveniently analyzed. (The MeteoWare CS 4 is
not included!)
The communication of the Ser[LOG] with the user's PC is either via
•cable connection (RS232, RS422, RS485)
•network connection (100 Mbps Ethernet) or
•wireless or mobile (GPRS, EDGE, UMTS, HSPA +, LTE)
•USB and Bluetooth (only for service purposes)
A total of 26 simultaneous communications are supported.
In the "push mode" the Ser[LOG] automatically sends the measured data via FTP and / or e-mail Ether-
net, WiFi or cellular (2G / 3G / 4G).
The Ser[LOG] can control up to 10 "Switching Channels", each switch a relay and / or send e-mail or
SMS messages. The Ser[LOG] provides two built-relays; additionally up to 8 external Modbus relays
can be controlled.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 12 of 129
1.1 Description Ser[LOG] for serial sensors
LED M – Measuring rate
LED P – Data processing
Display
Turn-push putton
Mini-USB service interface
USB-Host
Ethernet
Status inputs
Power supply input
SDI-12-
Interface
Relay outputs Terminal clamp
AnDiMod
COM-Interfaces
Cover jumper panel
Power supply
input
Terminal "VIN" The device can be powered by 10-30 VDC. The connection is pro-
tected against reverse polarity. The installed DC / DC-converter are not isolated.
Note: The applied supply voltage is routed through the "Ser[LOG] bus" to the con-
nected AnDiMod measurement modules. The modules also provide this voltage to
supply the sensors. This means that for the sensor supply terminals always receive
the same voltage as the Ser[LOG] unit.
Turn-push
button
The rotary push button enables the following operations of the Ser[LOG]:
•Display of instantaneous values,
•Export of data and Ser[LOG] configuration,
•Import of a Ser[LOG] configuration,
•Update of the device firmware,
•Activation of a Bluetooth stick and
•Reading of device information.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 13 of 129
Display
The two-line LCD display is activated when the rotary push button is oper-
ated. After one minute of idle time, the display switches off automatically.
Mini USB ser-
vice interface
The mini USB port is used solely to configure and verify the device. This
connection is not suitable for permanently connecting the unit to a PC. (Var-
ious PCs inadvertently force a reboot of the device when they switch to or
from the power saving mode. In this case, an averaging block is lost.)
USB host
The USB host port is for plugging-in a USB memory stick or a Bluetooth
adapter. The Ser[LOG] delivers a maximum of 200 mA via USB. Consumers
with higher power consumption are not supported.
Ethernet
The network connection of Ser[LOG] supports 10 Mbit / s / 100 Mbit / s. The
device does not support DHCP server but requires a fixed IP address.
COM inter-
faces
The Ser[LOG] has 6 serial ports, which can be partially operated as RS232,
RS422 or RS485. Furthermore, Modbus and SDI-12 interfaces are available.
When SDI-12 sensors used, the connection runs via the separate SDI-12
terminal on Ser[LOG]. In this case the SDI-12 unit occupies COM5 interface
and the COM5 port is disabled.
If the Ser[LOG] is extended with one or more AnDiMod modules, the con-
nection is made via the separate terminal of 4 found on the bottom of the
housing. In this case the AnDiMod modules occupy the COM6 interface and
the COM6 port is disabled.
The COM1 to COM4 may be configured with the Ser[LOG] -Commander to
RS232. An RS232 interface with handshake line is only available on the
COM1.
COM2 to COM6 can be switched via jumper RS485 (default) to RS422. The
COM1 is not switchable to RS485.
The interfaces can be switched on with the Ser[LOG] Commander and off.
SDI-12 inter-
face
The "SDI-12" port has 3 terminals. The communication signal (+) is applied
to the terminal "IO", at terminal "GND", the mass is connected. If the con-
nection cable of the SDI-12 bus carries the bus voltage, it can be parked on
the terminal"(V)". The terminal (V) is not connected to the device’s electron-
ics by the factory (dead set). The Ser[LOG] does not supply the SDI-12 bus
in the standard version with power. The supply of the SDI-12 bus must take
place separately.
Status Inputs
The two status inputs "DA" and "DB" can be used for registration of states
(switch ON / OFF).

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 14 of 129
Relay out-
puts
The relays "R1" and "R2" are bistable, potential-free changeover switch. At
"C", the signal to be switched is applied. In the idle state there is a switching
connection to "S0", in active state to "S1". The relays may be loaded with up
to 30 V and 0.5 A.
Cover jumper
panel
There is a jumper field under the cover. Via the jumper field of the hardware
drivers COM2 may be switched to COM6 from RS485 to RS422 and 120 Ω
termination resistors are switched in. See Section 13
LED - M -
Measuring
rate
The LED "M" flashes on the set measurement cycle. The light-ON-time is
analogue to the duration of the measurement. After switching on the
Ser[LOG], the LED lights up until the "boot" is complete.
LED – Data
processing
LED "P" flashes during data processing. When 10 minutes average values
are generated, the LED flashes only every 10 minutes. The lighting duration
is analogous to the duration of data processing.
AnDiMod ter-
minal clamp
If the Ser[LOG] is extended with one or more AnDiMod modules, the con-
nection is made via the 4-pin terminal on the bottom of the housing.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 15 of 129
1.2 Description AnDiMod · Measurement module for analogue / digital
sensors
There are three different extension modules for the Ser[LOG] and Ser[LOG]Plus. The modules AnDiMod
1-3 differ in their address on the Ser[LOG] bus. If a Ser[LOG] system is extended with an AnDiMod
module, a prior examination is necessary to determine how many modules have already been connected
and that these modules have been assigned with the correct addresses (the numbering follows). The
first module (upon extending a Ser[LOG]) must carry address 1. The first module (upon extending a
Ser[LOG]Plus) must carry address 2, since AnDiMod with address 1 in Ser[LOG]Plus is already inte-
grated. The respective address of AnDiMod is fixed and cannot be customized by the user.
Sensor supply
Terminal clamp AnDiMod
Digital inputs
Analog inputs
Analog inputs
An AnDiMod has 12 universally configurable analogue inputs. The channels can
be set for the measuring ranges:
●5 V bipolar,
●5V unipolar,
●50 mV bipolar,
●20 mA
●500 ohms
●5000 ohms.
For the measurement of 20mA
signals, a measuring resistor (shunt) must be
switched on. This is done by setting a bridge in the upper two terminals.
Digital Inputs
The inputs "D1", "D2" and "D3" are for connecting digital sensors. They can be used
to capture:

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 16 of 129
●Status signals (ON / OFF)
●Pulses (counter / precipitation) or
●Frequencies (up to 10 kHz)
Sensor supply
There are connection terminals available for supplying up to 6 sensors. The voltage
at the terminals corresponds to the supply voltage at terminal VIN with which the
Ser[LOG] is supplied. (24 V at the Ser[LOG] means 24 at these terminals VOUT =
VIN). The maximum current to the sensor supply for all the terminals together is
limited to 0.5 A.
1.3 Description Ser[LOG]Plus · Combined logger for serial, digital and an-
alogue sensors
AnDiMod
Ser[LOG]
COM6
internally
assigned to
AnDiMod
Terminal clamp AnDiMod
The Ser[LOG]Plus consists of a Ser[LOG] and a AnDiMod module (address 1) in a housing. Controls,
interfaces and label are mostly identical. Since the Ser[LOG]Plus already has an integrated AnDiMod
module has the COM6 interface is occupied by the AnDiMod module and COM6 terminal (unlabeled) is
disabled.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 17 of 129
2 Wiring - Device Connection
2.1 Supply voltage
Via terminal "VIN", the Ser[LOG] can be supplied with 10...30VDC. The connection is protected against
reverse polarity. The used DC / DC converter is not isolated. Typically, the Ser[LOG] is supplied with
12VDC or 24VDC.
Spannungsversorgung
Power supply
+ -
VIN
10...30 V
+ -
12 / 24 VDC
Note: The applied supply voltage is routed through the "Ser[LOG] bus" to the connected AnDiMod
measurement modules. The modules pass this voltage on to supply sensors. This means that the sensor
supply terminals always receive the same voltage that was applied on Ser[LOG]. VOUT = VIN
2.2 Connection - Serial devices
The following devices with serial interface can be connected to the Ser[LOG]:
•Sensors
•Evaluation PC
•Modem
•Modbus relay
•AnDiMod (COM6)
Important note: By default, factory settings the serial ports are disabled. The Ser[LOG] can be reached
during initial commissioning only via the mini-USB service interface or a (suitable) Bluetooth stick.
2.2.1 Terminal - apparatus with RS485 interface and Modbus RTU
By default, factory settings the equipment with RS485 interface (e.g. Modbus RTU protocol) can be via
the COM port 2-6 connected. The device is delivered so the RS485 hardware drivers for COM ports are
enabled through the jumper fields from 2 to 6.
COM2...4
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
RS485
Device
Data+
Data-
COM5...6
T+
T-
R+/D+
R-/D-
RS485
Device
Data+
Data-
RS485 jumper settings for COM2…6
Example of lower jumper field: RS485 hardware driver for COM2 to COM6 activated.
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 18 of 129
2.2.2 Special case - Sensors with RS485 interface in talker mode RS422
Some sensors transmit their readings automatically within a fixed time interval; they are operating in the
so-called talker mode. LAMBRECHT meteo sensors that have an RS485 interface and are operated in
talker mode, can be connected to the Ser[LOG] and to the "R +" and "R" terminal (Read-lines) of a
RS422 configured interface.
RS485
Device
Talker-Mode
RS485
Device
Talker-Mode
COM1
RTS
CTS
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
RS485
Device
Talker-Mode
Data+
Data-
COM2...4
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
Data+
Data-
COM5...6
T+
T-
R+/D+
R-/D-
Data+
Data-
RS422 jumper settings for COM1…6
Example of lower jumper field: RS422 hardware driver for COM2 to COM6 activated. (COM1 always RS422)
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.
2.2.3 Connection - devices with RS422 interface
In the default factory settings devices with RS422 interface can be connected to the COM port 1. On
these settings the RS485 hardware drivers are enabled by jumper field for the COM ports 2-6. These
can be switched to RS422 hardware drivers by disconnecting the respective jumpers (see picture
above).
RS422
Device
RS422
Device
COM1
RTS
CTS
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
RS422
Device
Tx+
Tx-
COM2...4
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
Tx+
Tx-
COM5...6
T+
T-
R+/D+
R-/D-
Tx+
Tx-
Rx+
Rx-
Rx+
Rx-
Rx+
Rx-
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 19 of 129
2.2.4 Special case sensors with RS422 interface in talker mode on RS485
Some sensors transmit their measured values automatically in a fixed time interval; they are then oper-
ated in the so-called talker mode. Sensors from LAMBRECHT meteo, which have an RS422 interface
that is operated in talker mode, can also be connected to the "D+" and "D-" terminals of an interface
configured as RS485 on the Ser[LOG].
Important note: In this case, the "Rx+" and "Rx-" lines of the sensor must not be connected to the
correspondingly labelled terminal of the COM interface, because the RS485 hardware driver "R+","T+"
and "R-","T-" are switched in parallel.
T+
T-
R+/D+
R-/D-
RS422
Device
Talker-Mode
Tx+
Tx-
Rx+
Rx-
N/C
N/C
T+
T-
R+/D+
R-/D-
RS422
Device
Talker-Mode
Tx+
Tx-
Rx+
Rx-
N/C
N/C
COM2...4
TxD
RxD
GND COM5...6
RS485 jumper settings for COM2…6
Example of lower jumper field: RS485 hardware driver for COM2 to COM6 activated.
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.
2.2.5 Connection – Sensors with SDI-12-Interface
SDI-12 sensors are configured in the Ser[LOG] commander via the COM5 interface. The Ser[LOG]
supports only a subset from the SDI-12 specification. The Ser[LOG] can only record measured values
from sensors that are generated with the CC command.
It is not possible to supply SDI-12 sensors via the Ser[LOG] (standard). The terminal (V) has no func-
tion.
I/O
(V)
GND
SDI-12
SDI-12
Device
+12V
GND
I/O
Power ONCOM5 =Set
Standard (V) = open no function
N/C
Note: In order to use the SDI-12 interfaces, the COM5 must still be switched on with the Ser[LOG]
commander and configured for SDI-12.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 20 of 129
2.2.6 Connection - Modem with RS232 interface
Most modems have an RS232 interface. Some modems require RS232 handshake lines for communi-
cation with the data logger. These modems can be connected to the COM1 interface. COM2 to COM4
do not have any hand-shake lines.
RS232
Modem
no hand-
shake
TxD
RxD
GND
COM2...4
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
COM1
RTS
CTS
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
RS232
Modem
with hand-
shake
RTS
CTS
TxD
RxD
GND
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.
2.2.7 Connection - PC with RS232 interface
Most modern PCs no longer have an RS232 interface. Nevertheless, the Ser[LOG] can also be con-
nected to a PC via RS232 for configuration and evaluation.
According to the RS232 standard, communication lines must be crossed for connection to the PC. If for
communication the RS232 hand-shake line is required, the PC can only be connected via the COM1
interface (the hand-shake lines must then also be crossed). COM2 to COM4 do not have any hand-
shake lines.
RS232
PC
no hand-
shake
TxD
RxD
GND
COM2...4
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
COM1
RTS
CTS
TxD
RxD
GND
T+
T-
R+/D+
R-/D-
RS232
PC
with hand-
shake
RTS
CTS
TxD
RxD
GND
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.