Data loggers
DL7
The DL7 is a multichannel data logger in a 144 × 192 mm panel-mount enclosure, equipped with a 7-inch touchscreen. It supports up to 42 input/output signals and displays up to 100 channels.
It measures and records temperature, humidity, pressure, flow, level and other process variables. Depending on the configuration, it supports 4–20 mA and 0–10 V signals, RTD sensors including Pt100, thermocouples, HART communication and Modbus RTU Master functionality.
Ethernet (Modbus TCP) and RS-485 (Modbus RTU) communication enable integration with a host system, such as SCADA. The built-in web server provides access to measurement readings via a web browser, while 32 GB of internal memory allows data to be archived.
DL7 multichannel data logger in a panel-mount enclosure
The DL7 is a modular industrial data logger designed to measure, display and archive process variables. Its input and output configuration can be tailored to the number of measurement points, sensor types and system requirements.
- Supports up to 42 input/output signals, depending on the configuration.
- Displays up to 100 channels.
- 7″ colour LCD touchscreen.
- 32 GB internal data memory.
- Front-panel USB port with a protective cap providing an IP54 rating when closed.
- Ethernet port supporting Modbus TCP Client/Server and a built-in web server.
- RS-485 communication with Modbus RTU — Slave functionality in the base module; Master functionality available with an appropriate expansion module.
- Software for device configuration and measurement data visualisation and analysis.
DL7 data logger applications
The DL7 multichannel data logger is suitable for applications in the energy, chemical, pharmaceutical, food and metallurgical industries, as well as manufacturing facilities and laboratories. Depending on the selected modules and connected sensors or transmitters, it can monitor temperature, humidity, pressure, flow, level and other process variables.
The DL7 can record temperature changes in food cold stores and monitor temperature and humidity in warehouses. Alarms and email notifications allow users to be informed when configured thresholds are exceeded. When connected to flow meters, the logger can display instantaneous flow rates and totalise fluid volume, for example for daily, weekly or monthly summaries.
In industrial installations, the logger can monitor the operating parameters of boilers, machinery and production lines. In laboratories and on test benches, it allows readings from multiple measurement points to be compared and test or process data to be archived.
Main functions
- Measurement of process variables, with readings displayed in tables or trend charts.
- Two counters per channel, used, for example, to totalise fluid volume from flow measurements.
- Two alarms or control thresholds per channel.
- Minimum and maximum value tracking.
- Mathematical functions using channel, counter and alarm values.
- A configurable user-defined characteristic curve.
- Measurement data and event logging.
- Email alarm notifications and periodic reports containing counter values and measurement readings.
- Channel setpoint entry via the touchscreen.
- Communication with a host computer system.
Input and output modules
The DL7 consists of a base module equipped with USB ports, an Ethernet port, an RS-485 port and a 24 V DC power connection. Up to seven input/output modules can be installed to suit the number and type of measurement signals and the required functions.
Analogue and temperature inputs
- IN6I(24V) — six 0–20 mA or 4–20 mA analogue inputs with transmitter power supply capability.
- IN6I — six 0–20 mA or 4–20 mA analogue inputs without a transmitter power supply.
- IN6T — six inputs for RTD temperature sensors (Pt, Ni, Cu, KTY) or thermocouples (J, L, K, U, E, N, B, R, S). Also supports linear resistance measurement from 0 to 4500 Ω or voltage measurement from −140 to +140 mV.
- IN6V — six voltage inputs supporting −10 to +10 V, 0–10 V, 2–10 V, 0–5 V and 1–5 V ranges.
- IN6 — six analogue inputs. Inputs 1–3 support RTD sensors, thermocouples and linear resistance measurement from 0 to 4500 Ω or voltage measurement from −140 to +140 mV. Inputs 4–6 support 0–20 mA, 4–20 mA, 0–10 V, 2–10 V, 0–5 V and 1–5 V signals.
- IN4SG — four ±30 mV analogue inputs for strain gauge sensors with a sensitivity of 1, 2 or 4 mV/V, or a user-defined sensitivity. The module provides a 5 V DC sensor supply and four digital inputs for taring.
Digital and pulse inputs
- IN6D — six digital inputs for state monitoring, frequency measurement from 0.1 to 1000 Hz and pulse counting from 0 to 100 Hz, with transmitter power supply capability.
- IN3D — three digital inputs for state monitoring, frequency measurement from 0.1 to 12,500 Hz and pulse counting from 0 to 100 Hz, with transmitter power supply capability.
Communication modules
- 2RS485(24V) — two independent, isolated RS-485 ports for reading transmitters and other Modbus RTU devices, with transmitter power supply capability.
- 2RS485 — two independent, isolated RS-485 ports for reading transmitters and other Modbus RTU devices.
- 1HRT — a HART port (4–20 mA) with transmitter power supply capability, operating in Primary Master or Secondary Master mode and supporting up to 15 HART devices.
Outputs and battery power
- OUT6RL — six solid-state relays for alarm and control functions, rated at 24 V / 0.5 A.
- OUT3 — three programmable analogue outputs: 0–20 mA, 4–20 mA, 0–5 V, 1–5 V, 0–10 V or 2–10 V.
- PSBATT — a NiMH battery power module providing backup operation during a power outage or temporary battery-powered operation. Operating time ranges from 1 to 20 hours, depending on the configuration.
Data logging and archiving
The DL7 stores measurement readings in 32 GB of internal memory. Data can be accessed via USB and Ethernet, and archived trends can be viewed directly on the logger’s display.
- Configurable logging interval for current readings.
- Automatic switching between logging intervals when an alarm occurs.
- Counter value logging intervals from 1 minute to 24 hours.
- File checksums that allow modifications to recorded data to be detected.
| Front panel | |
| Type of display | LCD TFT 7” 800 px X 480 px
LED backlight |
| Display size | 152 mm X 91 mm |
| Keyboard | resistive touch panel |
| Additional indication | LED red/blue |
| Port USB – front panel | |
| Version | USB 2.0 (with limited functionality, for connection of FLASH storage) |
| Connector type | USB standard ‘A’ type socket |
| Protection class | IP54 (with silicone dust cover) |
| Port USB – rear panel | |
| Version | USB 2.0 ( with limited functionality, for connection of FLASH storage) |
| Port socket | USB standard ‘A’ type socket |
| Ethernet Port – rear panel | |
| Interface | 10/100 Base-T Ethernet |
| Connector type | RJ-45 |
| Transmission protocol | Server WWW, Modbus TCP Client/Server
ICMP (ping) |
| Modbus TCP Client | |
| Number of connections opened simultaneously | Max 20 |
| Number of read values | Max 100 |
| Modbus TCP Server | |
| Number of connections opened simultaneously | Max 4 |
| RS-485 Serial Port – rear panel | |
| Signals output on terminal block | A(+), B(-), G, G (G – signal ground) |
| Maximum load | 32 receivers/transmitters |
| Transmission protocol | Modbus RTU Slave |
| Transmission rate | 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbps |
| Parity control | Even, Odd, None |
| Frame | 1 start bit, 8 data bits, 1 stop bit |
| Maximum length of line | 1200 m |
| Internal terminating resistor | Vcc-A(+)-B(-)-G: 390 Ω – 220 Ω – 390 Ω
(activated by DIP-switches) |
| Maximum differntial voltage A(+), B(-) | -7 V .. +12 V |
| Minimum output signal of transmitter | 1.5 V (at RL= 54 W) |
| Minimum sensitivity of receiver | 200 mV / RIN= 12 kW |
| Minimum impedance of data transmission line | 54 W |
| Short-circuit / thermal protection | Yes / Yes |
| Internal data memory | |
| Memory type | Flash |
| Capacity | 32 GB |
| Estimated recording time for recording speed every 5 s for 16 measuring channels | ca. 10 years |
| Supply | |
| Supply voltage | 24 VDC (20 .. 30 VDC) |
| Maximum power consumption | 48 W ( when installed seven modules ) |
| Security | The internal delay fuse 3.15 A, the exchange only by the service company |
| Electrical connections (terminal connectors) | |
| Type | screw terminal connectors |
| Wire cross section | solid and flexible: 0.14 .. 1.5 mm2
flexible with bootlace ferrule 0.25 .. 1.5 mm2 AWG 30/14 |
| Mechanical Dimensions – Housing (DL7) | |
| Type of housing | For mounting in panels, non-flammable Lexan Resin 920 |
| Dimensions with connectors (h X w X d) | 144 mm X 192 mm X 97 mm |
| Dimensions of panel cut-out (h X w) | 138(+1) mm X 186(+1,1) mm |
| Maximum panel thickness | 5 mm |
| Weight | ca. 0.7 kg – base set
ca. 1.3 kg – full option |
| Protection class | IP54 on front panel side
IP20 on rear panel side |
| Mechanical Dimensions – Housing (DL7L) | |
| Type of housing | Standalone, non-flammable Lexan Resin 920 |
| Dimensions without connectors (h X w X d) | 155 mm X 202 mm X 89 mm |
| Weight | ca. 0.8 kg – base set
ca. 1.4 kg – full option |
| Protection class | IP20 |
| Environmental conditions | |
| Ambient temperature | 0 °C .. +50 °C or 0 °C .. +40 °C
depends on the device hardware configuration(1) |
| Relative humidity | 5 .. 95% (without steam condensation) |
| Height | < 2000 m n.p.m. |
| Storage temperature | -30 °C .. +70 °C |
| Degree of pollution | PD2 |
| EMC | EMC Directive 2014/30/UE
EN 61326-1:2013 Table 2 (immunity) EN 61326-1:2013 Class A (emission) |
| RoHS | RoHS Directive 2011/65/EU |
| (1)If module IN6I(24V) or IN2RS485(24V) installed and operating as a power supply source for external devices, ambient temperature is limited to 0 °C .. +40 °C . In all other configurations the ambient temperature range is 0 °C .. +50 °C. | |
DL7 multichannel data logger in a panel-mount enclosure
The DL7 is a modular industrial data logger designed to measure, display and archive process variables. Its input and output configuration can be tailored to the number of measurement points, sensor types and system requirements.
- Supports up to 42 input/output signals, depending on the configuration.
- Displays up to 100 channels.
- 7″ colour LCD touchscreen.
- 32 GB internal data memory.
- Front-panel USB port with a protective cap providing an IP54 rating when closed.
- Ethernet port supporting Modbus TCP Client/Server and a built-in web server.
- RS-485 communication with Modbus RTU — Slave functionality in the base module; Master functionality available with an appropriate expansion module.
- Software for device configuration and measurement data visualisation and analysis.
DL7 data logger applications
The DL7 multichannel data logger is suitable for applications in the energy, chemical, pharmaceutical, food and metallurgical industries, as well as manufacturing facilities and laboratories. Depending on the selected modules and connected sensors or transmitters, it can monitor temperature, humidity, pressure, flow, level and other process variables.
The DL7 can record temperature changes in food cold stores and monitor temperature and humidity in warehouses. Alarms and email notifications allow users to be informed when configured thresholds are exceeded. When connected to flow meters, the logger can display instantaneous flow rates and totalise fluid volume, for example for daily, weekly or monthly summaries.
In industrial installations, the logger can monitor the operating parameters of boilers, machinery and production lines. In laboratories and on test benches, it allows readings from multiple measurement points to be compared and test or process data to be archived.
Main functions
- Measurement of process variables, with readings displayed in tables or trend charts.
- Two counters per channel, used, for example, to totalise fluid volume from flow measurements.
- Two alarms or control thresholds per channel.
- Minimum and maximum value tracking.
- Mathematical functions using channel, counter and alarm values.
- A configurable user-defined characteristic curve.
- Measurement data and event logging.
- Email alarm notifications and periodic reports containing counter values and measurement readings.
- Channel setpoint entry via the touchscreen.
- Communication with a host computer system.
Input and output modules
The DL7 consists of a base module equipped with USB ports, an Ethernet port, an RS-485 port and a 24 V DC power connection. Up to seven input/output modules can be installed to suit the number and type of measurement signals and the required functions.
Analogue and temperature inputs
- IN6I(24V) — six 0–20 mA or 4–20 mA analogue inputs with transmitter power supply capability.
- IN6I — six 0–20 mA or 4–20 mA analogue inputs without a transmitter power supply.
- IN6T — six inputs for RTD temperature sensors (Pt, Ni, Cu, KTY) or thermocouples (J, L, K, U, E, N, B, R, S). Also supports linear resistance measurement from 0 to 4500 Ω or voltage measurement from −140 to +140 mV.
- IN6V — six voltage inputs supporting −10 to +10 V, 0–10 V, 2–10 V, 0–5 V and 1–5 V ranges.
- IN6 — six analogue inputs. Inputs 1–3 support RTD sensors, thermocouples and linear resistance measurement from 0 to 4500 Ω or voltage measurement from −140 to +140 mV. Inputs 4–6 support 0–20 mA, 4–20 mA, 0–10 V, 2–10 V, 0–5 V and 1–5 V signals.
- IN4SG — four ±30 mV analogue inputs for strain gauge sensors with a sensitivity of 1, 2 or 4 mV/V, or a user-defined sensitivity. The module provides a 5 V DC sensor supply and four digital inputs for taring.
Digital and pulse inputs
- IN6D — six digital inputs for state monitoring, frequency measurement from 0.1 to 1000 Hz and pulse counting from 0 to 100 Hz, with transmitter power supply capability.
- IN3D — three digital inputs for state monitoring, frequency measurement from 0.1 to 12,500 Hz and pulse counting from 0 to 100 Hz, with transmitter power supply capability.
Communication modules
- 2RS485(24V) — two independent, isolated RS-485 ports for reading transmitters and other Modbus RTU devices, with transmitter power supply capability.
- 2RS485 — two independent, isolated RS-485 ports for reading transmitters and other Modbus RTU devices.
- 1HRT — a HART port (4–20 mA) with transmitter power supply capability, operating in Primary Master or Secondary Master mode and supporting up to 15 HART devices.
Outputs and battery power
- OUT6RL — six solid-state relays for alarm and control functions, rated at 24 V / 0.5 A.
- OUT3 — three programmable analogue outputs: 0–20 mA, 4–20 mA, 0–5 V, 1–5 V, 0–10 V or 2–10 V.
- PSBATT — a NiMH battery power module providing backup operation during a power outage or temporary battery-powered operation. Operating time ranges from 1 to 20 hours, depending on the configuration.
Data logging and archiving
The DL7 stores measurement readings in 32 GB of internal memory. Data can be accessed via USB and Ethernet, and archived trends can be viewed directly on the logger’s display.
- Configurable logging interval for current readings.
- Automatic switching between logging intervals when an alarm occurs.
- Counter value logging intervals from 1 minute to 24 hours.
- File checksums that allow modifications to recorded data to be detected.
| Front panel | |
| Type of display | LCD TFT 7” 800 px X 480 px
LED backlight |
| Display size | 152 mm X 91 mm |
| Keyboard | resistive touch panel |
| Additional indication | LED red/blue |
| Port USB – front panel | |
| Version | USB 2.0 (with limited functionality, for connection of FLASH storage) |
| Connector type | USB standard ‘A’ type socket |
| Protection class | IP54 (with silicone dust cover) |
| Port USB – rear panel | |
| Version | USB 2.0 ( with limited functionality, for connection of FLASH storage) |
| Port socket | USB standard ‘A’ type socket |
| Ethernet Port – rear panel | |
| Interface | 10/100 Base-T Ethernet |
| Connector type | RJ-45 |
| Transmission protocol | Server WWW, Modbus TCP Client/Server
ICMP (ping) |
| Modbus TCP Client | |
| Number of connections opened simultaneously | Max 20 |
| Number of read values | Max 100 |
| Modbus TCP Server | |
| Number of connections opened simultaneously | Max 4 |
| RS-485 Serial Port – rear panel | |
| Signals output on terminal block | A(+), B(-), G, G (G – signal ground) |
| Maximum load | 32 receivers/transmitters |
| Transmission protocol | Modbus RTU Slave |
| Transmission rate | 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbps |
| Parity control | Even, Odd, None |
| Frame | 1 start bit, 8 data bits, 1 stop bit |
| Maximum length of line | 1200 m |
| Internal terminating resistor | Vcc-A(+)-B(-)-G: 390 Ω – 220 Ω – 390 Ω
(activated by DIP-switches) |
| Maximum differntial voltage A(+), B(-) | -7 V .. +12 V |
| Minimum output signal of transmitter | 1.5 V (at RL= 54 W) |
| Minimum sensitivity of receiver | 200 mV / RIN= 12 kW |
| Minimum impedance of data transmission line | 54 W |
| Short-circuit / thermal protection | Yes / Yes |
| Internal data memory | |
| Memory type | Flash |
| Capacity | 32 GB |
| Estimated recording time for recording speed every 5 s for 16 measuring channels | ca. 10 years |
| Supply | |
| Supply voltage | 24 VDC (20 .. 30 VDC) |
| Maximum power consumption | 48 W ( when installed seven modules ) |
| Security | The internal delay fuse 3.15 A, the exchange only by the service company |
| Electrical connections (terminal connectors) | |
| Type | screw terminal connectors |
| Wire cross section | solid and flexible: 0.14 .. 1.5 mm2
flexible with bootlace ferrule 0.25 .. 1.5 mm2 AWG 30/14 |
| Mechanical Dimensions – Housing (DL7) | |
| Type of housing | For mounting in panels, non-flammable Lexan Resin 920 |
| Dimensions with connectors (h X w X d) | 144 mm X 192 mm X 97 mm |
| Dimensions of panel cut-out (h X w) | 138(+1) mm X 186(+1,1) mm |
| Maximum panel thickness | 5 mm |
| Weight | ca. 0.7 kg – base set
ca. 1.3 kg – full option |
| Protection class | IP54 on front panel side
IP20 on rear panel side |
| Mechanical Dimensions – Housing (DL7L) | |
| Type of housing | Standalone, non-flammable Lexan Resin 920 |
| Dimensions without connectors (h X w X d) | 155 mm X 202 mm X 89 mm |
| Weight | ca. 0.8 kg – base set
ca. 1.4 kg – full option |
| Protection class | IP20 |
| Environmental conditions | |
| Ambient temperature | 0 °C .. +50 °C or 0 °C .. +40 °C
depends on the device hardware configuration(1) |
| Relative humidity | 5 .. 95% (without steam condensation) |
| Height | < 2000 m n.p.m. |
| Storage temperature | -30 °C .. +70 °C |
| Degree of pollution | PD2 |
| EMC | EMC Directive 2014/30/UE
EN 61326-1:2013 Table 2 (immunity) EN 61326-1:2013 Class A (emission) |
| RoHS | RoHS Directive 2011/65/EU |
| (1)If module IN6I(24V) or IN2RS485(24V) installed and operating as a power supply source for external devices, ambient temperature is limited to 0 °C .. +40 °C . In all other configurations the ambient temperature range is 0 °C .. +50 °C. | |