Lambrecht Ser[LOG] User manual

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 1 of 113
Ser[LOG]
Operator'sManual·Version11.18
LAMBRECHTmeteoGmbH∙FriedländerWeg65‐67∙37085Göttingen
Phone:+495514958‐0∙E‐Mail:[email protected]

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 2 of 113
Chapter Overview
Page
1Description Ser[LOG] .....................................................................................................9
2Wiring - Device Connection .........................................................................................16
3Display Menu.................................................................................................................25
4General Operation of the Ser[LOG]-Commander.......................................................30
5Commissioning / basic configuration.........................................................................36
6IP Communikation.........................................................................................................65
7Configuration of the switching outputs and alarms..................................................73
8Configuration of wind data processing ......................................................................82
9SDI-12 Dialogue - Tool..................................................................................................83
10 Firmware Update .......................................................................................................84
11 Other functions - USB stick readout........................................................................85
12 Connection diagrams................................................................................................86
13 Supported serial protocols.......................................................................................95
14 List of predefined sensors........................................................................................98
15 Jumper field terminating resistor and interface driver RS485 / RS422.............104
16 Warranty...................................................................................................................106
17 Ser[LOG] sensor assignment.................................................................................107
18 ASCII character table ..............................................................................................111
19 Technical data..........................................................................................................112

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 3 of 113
©Copyright2017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.

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Contents
Seite
1Description Ser[LOG].................................................................................................................... 9
1.1 Description Ser[LOG] for serial sensors................................................................................ 11
1.2 Description AnDiMod · Measurement modul for analogue / digital sensors ......................... 14
1.3 Description Ser[LOG]Plus · Combined logger for serial, digital and analogue sensors........ 15
2Wiring - Device Connection........................................................................................................ 16
2.1 Supply voltage ....................................................................................................................... 16
2.2 Connection - Serial devices................................................................................................... 16
2.2.1 Terminal - apparatus with RS485 interface and Modbus RTU........................................ 16
2.2.2 Special case - Sensors with RS485 interface in talker mode RS422.............................. 17
2.2.3 Connection - devices with RS422 interface..................................................................... 17
2.2.4 Special case sensors with RS422 interface in talker mode on RS485............................ 18
2.2.5 Connection - Modem with RS232 interface ..................................................................... 18
2.2.6 Connection - PC with RS232 interface ............................................................................ 19
2.3 Connection of analogue sensors........................................................................................... 19
2.3.1 Connection - Sensors with voltage signal........................................................................ 20
2.3.2 Connection - Sensors with current signals (0/4...20mA) ................................................. 20
2.3.3 Connection - Resistance measurement Pt100, Pt1000, potentiometer .......................... 20
2.4 Connection of digital sensors ................................................................................................ 21
2.4.1 Connection - Sensors with status signals........................................................................ 21
2.4.2 Connection - Sensors with pulse signals (counter) ......................................................... 21
2.4.3 Connection - Sensors with frequency signals.................................................................. 21
2.5 Connection terminals for the supply of sensors .................................................................... 22
2.6 Connection - Relay outputs ................................................................................................... 22
2.7 Connection - AnDiMod Module.............................................................................................. 22
3Display Menu ............................................................................................................................... 25
3.1 Realtime Values .................................................................................................................... 25
3.2 Data Export............................................................................................................................ 26
3.3 Config Import via USB stick................................................................................................... 26
3.4 Firmware Update ................................................................................................................... 27
3.5 Bluetooth ON ......................................................................................................................... 28
3.6 INFO ...................................................................................................................................... 29
3.7 Display Off ............................................................................................................................. 29
4General Operation of the Ser[LOG]-Commander..................................................................... 30

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4.1 Configuring the "Ser[LOG] function"...................................................................................... 31
4.2 Function „Tools“..................................................................................................................... 33
4.3 Function „Display instantaneous values“............................................................................... 33
4.4 Function „Retrieve measured values“ ................................................................................... 34
4.5 Function „Display measurement data“ .................................................................................. 34
4.6 Function „Sensor definition“................................................................................................... 34
4.7 Function „Actuator definition“................................................................................................. 35
4.8 Other functions ...................................................................................................................... 35
5Commissioning / basic configuration....................................................................................... 36
5.1 Connecting sensors............................................................................................................... 36
5.2 Connecting to the supply voltage .......................................................................................... 36
5.3 Configuration of the Ser[LOG]............................................................................................... 36
5.3.1 Basic Station Configuration ............................................................................................. 36
5.3.1.1 Configuration via Mini-USB Service Interface......................................................... 37
5.3.1.2 Configuration via USB Bluetooth stick.................................................................... 37
5.3.1.3 Create new configuration........................................................................................ 38
5.3.2 Activating AnDiMod Extension Modules.......................................................................... 38
5.3.3 Setting the measured value storage................................................................................ 39
5.3.3.1 Setting instantaneous values as 3-second moving averages................................. 39
5.3.4 Interface configuration for measured value retrieval and remote configuration .............. 39
5.3.4.1 Communication via network / Internet (TCP/IP) ..................................................... 39
5.3.4.2 Communication via serial interface RS232 / RS485 / RS422................................. 40
5.3.4.3 Communication via GSM / CSD modem................................................................. 41
5.3.5 Password for remote configuration.................................................................................. 41
5.3.6 Configuration of the sensors............................................................................................ 42
5.3.6.1 Configuration Global Radiation Sensors................................................................. 43
5.3.6.2 Configuration of a pair of vectorially linked wind sensors....................................... 43
5.3.6.3 Configuration serial sensors ................................................................................... 44
5.3.6.3.1 Configuration of the serial interface for sensors................................................ 44
5.3.6.3.2 Setting the data retrieval interval for SDI-12, Modbus RTU and Modbus TCP
sensors .............................................................................................................. 45
5.3.6.3.3 Assignment of serial sensors to the measurement channels............................ 45
5.3.6.3.4 Assignment of SDI-12 sensors to the measurement channels ......................... 45
5.3.6.3.5 Assignment of Modbus RTU sensors to the measurement channels ............... 46
5.3.6.3.6 Assignment of Modbus TCP sensors to the measurement channels ............... 46

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5.3.6.3.7 Assignment of virtual sensors to the measurement channels........................... 46
5.3.6.4 Configuration of sensors with look-up table............................................................ 47
5.3.6.5 Creating new sensors ............................................................................................. 48
5.3.6.5.1 Channel type - Analog ....................................................................................... 51
5.3.6.5.2 Channel type - Status ........................................................................................ 53
5.3.6.5.3 Channel type – Digital........................................................................................ 54
5.3.6.5.4 Channel type - Modbus...................................................................................... 55
5.3.6.5.5 Channel type - SDI-12 ....................................................................................... 56
5.3.6.5.6 Channel type - Serial (e. g. NMEA) ................................................................... 57
5.3.6.5.7 Channel type - Virtual ........................................................................................ 58
5.3.6.5.8 Special function for sensor definition................................................................. 59
5.4 Displaying instantaneous values ........................................................................................... 60
5.4.1 Standard instantaneous value display............................................................................. 60
5.4.2 Display of the current electrical raw values..................................................................... 61
5.4.3 Instantaneous value display via UDP.............................................................................. 61
5.4.4 Display of moving wind data............................................................................................ 62
5.4.5 Error messages of the instantaneous values .................................................................. 62
5.5 Recalling and saving measured values................................................................................. 63
5.6 Display measurement data.................................................................................................... 64
6IP Communication.........................................................................................................65
6.1.1.1 Synchronization of the clock via NTP ..................................................................... 66
6.1.1.2 Data Transfer via FTP - Ser[LOG] as FTP Client ................................................... 66
6.1.1.3 Transmission of measured values via Email / Email alarm .................................... 68
6.1.1.4 Setting the Export Format for FTP and Email......................................................... 69
6.1.1.5 Settings for IP communication via mobile radio modem......................................... 70
6.1.1.6 Setting SMS alarm .................................................................................................. 71
7Configuration of the switching outputs and alarms..................................................73
7.1 Process control...................................................................................................................... 74
7.2 Cycle control.......................................................................................................................... 74
7.3 Error monitoring..................................................................................................................... 76
7.4 Area monitoring ..................................................................................................................... 77
7.4.1 Simple area monitoring (OR operation)........................................................................... 77
7.4.2 Group-related area monitoring (AND operation) ............................................................. 78
7.4.3 Modbus relay ................................................................................................................... 80
7.4.4 Definition of new Modbus relays...................................................................................... 81

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8Configuration of wind data processing ......................................................................82
9SDI-12 Dialogue - Tool..................................................................................................83
10 Firmware Update .......................................................................................................84
11 Other functions - USB stick readout........................................................................85
12 Connection diagrams................................................................................................86
12.1 Overview - Terminal assignment Ser[LOG]Plus.................................................................... 86
13 Supported serial protocols.......................................................................................95
13.1 NMEA .................................................................................................................................... 95
13.2 RPT350.................................................................................................................................. 95
13.3 PTB330.................................................................................................................................. 95
13.4 LDWHM_12 ........................................................................................................................... 95
13.5 LD-40 ..................................................................................................................................... 95
13.6 CL31 msg 2_base ................................................................................................................. 95
13.7 FS11 ...................................................................................................................................... 95
13.8 rain[e] 'SDI-12 on RS485' ...................................................................................................... 96
13.9 Pluvio 1 DWD ........................................................................................................................ 96
13.10 Pluvio 2 ‘M Command’..................................................................................................... 96
13.11 X81................................................................................................................................... 96
13.12 VFP-730 ‘compressed format’ ......................................................................................... 96
13.13 15189 'SDI-12 on RS485' ................................................................................................ 96
13.14 LPM Distrometer ‘Tel. 6’ .................................................................................................. 96
13.15 Modbus Sensor................................................................................................................ 96
13.16 SDI-12 (nur COM5).......................................................................................................... 96
13.17 SNAP ............................................................................................................................... 97
13.18 GPRS PPP....................................................................................................................... 97
13.19 Modbus Actuator / Actor .................................................................................................. 97
13.20 Ser[LOG] – AnDiMod-Bus (only COM6).......................................................................... 97
14 List of predefined sensors........................................................................................98
14.1 Predefined status sensors..................................................................................................... 98
14.1.1 Standard status sensors.............................................................................................. 98
14.1.2 LAMBRECHT status sensors ...................................................................................... 98
14.2 Predefined digital sensors ..................................................................................................... 98
14.2.1 Standard digital sensors.............................................................................................. 98
14.2.2 LAMBRECHT digital sensors ...................................................................................... 98
14.3 Predefined analog sensors.................................................................................................... 99

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14.3.1 Standard analog sensors ............................................................................................ 99
14.3.2 LAMBRECHT analog sensors..................................................................................... 99
14.4 Available serial sensors....................................................................................................... 101
14.4.1 LAMBRECHT serial sensors ..................................................................................... 101
14.4.2 LAMBRECHT SDI-12 sensors .................................................................................. 101
14.4.3 LAMBRECHT Modbus sensors................................................................................. 101
14.4.4 NMEA sensors........................................................................................................... 101
14.4.5 Additional serial sensors (proprietary)....................................................................... 102
14.4.6 Virtual sensors........................................................................................................... 103
14.4.7 Virtual Sensors - Special Function Redundancy....................................................... 103
15 Jumper field terminating resistor and interface driver RS485 / RS422.............104
15.1 Switching the COM2 to COM6 from RS485 to RS422........................................................ 105
15.2 Adding terminating resistors for RS485 or RS422 .............................................................. 105
16 Warranty...................................................................................................................106
17 Ser[LOG] sensor assignment.................................................................................107
17.1 Sensor assignment - AnDiMod or Ser[LOG]Plus analog section........................................ 108
17.2 Sensor assignment - AnDiMod or Ser[LOG]Plus analog section........................................ 109
17.3 Sensor assignment - AnDiMod or Ser[LOG]Plus analog section........................................ 110
18 ASCII character table ..............................................................................................111
19 Technical data..........................................................................................................112

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1 Description Ser[LOG]
The Ser[LOG] system family is an universal, scalable data acquisition, data processing and communi-
cation 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
available in the form of a mini-USB port. To the USB Host (2.0), memory stick for data export and se-
lected 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
includes 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 com-
plied 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

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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
sensors 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 CS3 the data collected can be conveniently analysed. (The MeteoWare CS 3 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
Ethernet, 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.

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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 re-
ceive the same voltage as the Ser[LOG] unit.

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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.
Display The two-line LCD display is activated when the rotary push button is operated.
After one minute of idle time, the display switches off automatically.
Mini USB
service inter-
face
The mini USB port is used solely to configure and verify the device. This connec-
tion is not suitable for permanently connecting the unit to a PC. (Various PCs inad-
vertently 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 TheSer[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 connection 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

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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. In the event that 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 electronics 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).
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 driv-
ers COM2 may be switched to COM6 from RS485 to RS422 and 120 termina-
tion 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 analo-
gous to the duration of data processing.
AnDiMod
terminal
clamp
If the Ser[LOG] is extended with one or more AnDiMod modules, the connection is
made via the 4-pin terminal on the bottom of the housing.

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1.2 Description AnDiMod · Measurement modul for analogue / digital sen-
sors
There are three different extension modules for the Ser[LOG] and Ser[LOG]Plus. The modules AnDi-
Mod 1-3 differ in their address on the Ser[LOG] bus. If a Ser[LOG] system is extended with an AnDi-
Mod 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 integrated. The respective address of AnDiMod is fixed and can not be customized by the
user.
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.

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Digital Inputs The inputs "D1", "D2" and "D3" are for connecting digital sensors. They can be
used to capture:
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 volt-
age 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 to-
gether is limited to 0.5 A.
1.3 Description Ser[LOG]Plus · Combined logger for serial, digital and
analogue sensors
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.

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2 Wiring - Device Connection
2.1 Supply voltage
Via terminal "VIN", the Ser[LOG] can be supplied with 10 ... 30 VDC. The connection is protected
against reverse polarity. The used DC / DC converter is not isolated. Typically, the Ser[LOG] is sup-
plied with 12VDC or 24VDC.
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.

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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 oper-
ated in talker mode, can be connected to the Ser[LOG] and to the "R +" and "R" terminal (Read-lines)
of a RS422 configured interface.
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).
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.

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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 op-
erated in the so-called talker mode. Sensors from LAMBRECHT meteo, which have an RS422 inter-
face that is operated in talker mode, can also be connected to the "D+" and "D-" terminals of an inter-
face 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 labeled 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 with the Ser[LOG]-
Commander configured.
2.2.5 Connection - Modem with RS232 interface
Most modems have an RS232 interface. Some modems require RS232 handshake lines for commu-
nication with the data logger. These modems can be connected to the COM1 interface. COM2 to
COM4 do not have any hand-shake lines.
Note: In order to use the occupied COM interfaces, they must be switched on and with the Ser[LOG]-
Commander configured.

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2.2.6 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.
Note: In order to use the occupied COM interfaces, they must be switched on and configured with the
Ser[LOG]-Commander.
2.3 Connection of analogue sensors
Analogue sensors can be connected to the Ser[LOG]Plus or the AnDiMod modules. For each AnDi-
Mod module (Ser[LOG]Plus already contains one), 12 analogue signals can be measured. The sys-
tems can be expanded to a maximum of up to 36 analogue signals.
The analogue inputs can be used to measure each time:
•5 V bipolar,
•5 V unipolar,
•50 mV bipolar,
•0/4... 20 mA,
•500 Ohm and
•5000 Ohm.
Note: In order for the occupied analogue inputs to be used, they must still be configured with the
Ser[LOG]-Commander.

LAMBRECHT meteo GmbH Ser[LOG] Manual Page 20 of 113
2.3.1 Connection - Sensors with voltage signal
Voltage signals can be measured by the Ser[LOG]Plus or AnDiMod up to a maximum of 5V. If sensors
with higher voltages (e. g. 10 V) are to be measured, suitable voltage dividers must be used. For the
measurement of millivolts (mV) signals, the analog inputs can be set to the measuring range ± 50mV
with the Ser[LOG]-Commander.
2.3.2 Connection - Sensors with current signals (0/4...20mA)
If sensors with 0...20mA or 4...20mA signals are connected to the Ser[LOG]Plus or AnDiMod sensors,
the connection is also made to the "U+","U-" terminals. In addition, the internal shunt resistor must be
connected for the current measurement. The shunt resistor is connected by a bridge between the two
upper terminals (marked with "SHUNT").
2.3.3 Connection - Resistance measurement Pt100, Pt1000, potentiometer
Ser[LOG]Plus or AnDiMod can measure resistors in the measuring ranges 500 and 5000 . Typical
sensors with resistance outputs are e. g. temperature sensors with Pt-100 or Pt-1000 or wind direction
sensors with 1000 potentiometers. Pt100 (Pt1000) sensors are usually measured in 4-wire circuit; 3-
wire circuit and 2-wire circuit are also possible. The connection of a potentiometer is done in the same
way as with the 3-wire circuit.