Chapter 12. Technical Data
Table of Contents
- 12.1. Specification
- 12.2. Electrical Characteristics
- 12.2.1. Electrical Specifications of Analog Voltage Channels / Differential Inputs
- 12.2.2. Electrical Specifications of Counter Channels / Non-Differential Inputs
- 12.2.3. Electrical Specifications of Digital Channels (Serial Input / Output)
- 12.2.4. Electrical Specifications for Digital Clock Output
- 12.2.5. Electrical Specifications for Analog Current Source
- 12.2.6. Electrical Specifications for Precision 5V Voltage Source
- 12.2.7. Electrical Specifications for Switches
- 12.2.8. Electrical Specifications of the RS-485 Interface
- 12.2.9. Electrical Specification of the Ethernet Interface
- 12.2.10. Electrical Specification of the USB Interfaces
- 12.2.11. Electrical Specifications of Internal Measurements
- 12.2.12. Electrical Specification of the Power Supply
12.1. Specification
| Property | Specification | ||||
|---|---|---|---|---|---|
| Housing Dimensions | 260 × 194 × 65 [mm] | ||||
| Weight | 1.15 kg | ||||
| Protection | IP65 | ||||
| Temperature |
| ||||
| Memory |
| ||||
| Date Format | YYYY-MM-DD | ||||
| Time Format | hh:mm:ss | ||||
| Clock |
| ||||
| Power Supply | No internal supply! (see Section 12.2.12, “Electrical Specification of the Power Supply”) |
![[Important]](admon/important.png) | Important |
|---|---|
Meteo-42 has no internal supply battery! External power supply is essential for proper operation. Section 12.2.12, “Electrical Specification of the Power Supply” contains the characteristics of the voltage supply and the current consumption of the data logger. |
Figure 12.1. Mounting threads dimensions.
12.2. Electrical Characteristics
- 12.2.1. Electrical Specifications of Analog Voltage Channels / Differential Inputs
- 12.2.2. Electrical Specifications of Counter Channels / Non-Differential Inputs
- 12.2.3. Electrical Specifications of Digital Channels (Serial Input / Output)
- 12.2.4. Electrical Specifications for Digital Clock Output
- 12.2.5. Electrical Specifications for Analog Current Source
- 12.2.6. Electrical Specifications for Precision 5V Voltage Source
- 12.2.7. Electrical Specifications for Switches
- 12.2.8. Electrical Specifications of the RS-485 Interface
- 12.2.9. Electrical Specification of the Ethernet Interface
- 12.2.10. Electrical Specification of the USB Interfaces
- 12.2.11. Electrical Specifications of Internal Measurements
- 12.2.12. Electrical Specification of the Power Supply
The values given in the following tables
Table 12.1, “Electrical Specifications of Analog Voltage Channels / Differential
Inputs” to
Table 12.11, “Electrical Specification of the Power Supply”
contain the specifications of the digital
and analog inputs and outputs. The given values are specified for a temperature range of
-40 –
+65 °C.
![[Note]](admon/note.png) | Note |
|---|---|
All inputs and outputs are protected against overvoltage and electrostatic discharge using suppressor diodes. All voltage outputs of the data logger are fused by an self-resetting electronic fuse. Additionally, the power supply includes a reverse-polarity protection diode. |
12.2.1. Electrical Specifications of Analog Voltage Channels / Differential Inputs
Table 12.1. Electrical Specifications of Analog Voltage Channels / Differential Inputs
| Property | Specification | ||||
|---|---|---|---|---|---|
| Number of Channels per Data Logger Type |
| ||||
| Available Voltage Ranges (DC) |
| ||||
| Internal Resolution (Bit) |
| ||||
| Internal Resolution (Voltage) |
| ||||
| Measurement Accuracy (Voltage) |
| ||||
| Input Impedance | 1 MΩ | ||||
| Input Voltage |
| ||||
| Maximum Measurement Frequency | 4 Hz |
12.2.2. Electrical Specifications of Counter Channels / Non-Differential Inputs
The counter counts impulses within a defined measurement timespan. This measurement timespan is derived from a precise timer signal with a precision of ± 5 ppm in the temperature range -40–+65 °C.
In case of a measurement timespan of one second the count of impulses is equal to frequency (Unit: Hz).
Table 12.2. Electrical Specifications of Counter Channels / Non-Differential Inputs
| Property | Specification | |||
|---|---|---|---|---|
| Number of Channels per Data Logger Type |
| |||
| Maximum measurable frequency | 65535/period in Hz | |||
| Frequency Resolution [a] | 1/period in Hz | |||
| Voltage Threshold (f > 1 Hz) | 0.22 V | |||
| Input Voltage |
| |||
| Period Measurement (Non-Differential Inputs) |
| |||
[a] The frequency resolution depends on the measurement period setting. Longer period time setting results in higher resolution. Measurement period defines how often the signal frequency is measured per second. | ||||
12.2.3. Electrical Specifications of Digital Channels (Serial Input / Output)
Table 12.3. Electrical Specifications of Digital Channels (Serial Input / Output)
| Property | Specification | |||
|---|---|---|---|---|
| Number of Channels per Data Logger Type |
| |||
| Input Voltage Range (High State) | 2 V–25 V | |||
| Input Voltage Range (Low State) | -0.5 V–0.6 V | |||
| Input Resistance | ≥ 10 kΩ |
12.2.4. Electrical Specifications for Digital Clock Output
Table 12.4. Electrical Specifications for Digital Clock Output
| Property | Specification | |||
|---|---|---|---|---|
| Number of Channels per Data Logger Type |
| |||
| High State | 5 V | |||
| Low State | 0 V | |||
| Output Resistance | 100 Ω | |||
| Minimal Load Resistance | 500 Ω |
12.2.5. Electrical Specifications for Analog Current Source
Table 12.5. Electrical Specifications for Anlog Current Source
| Property | Specification | |||
|---|---|---|---|---|
| Number of Channels per Data Logger Type |
| |||
| Nominal Current | 200 µA | |||
| Tolerances | < 0.5 % | |||
| Max. Resistance | 10 kΩ |
12.2.6. Electrical Specifications for Precision 5V Voltage Source
Table 12.6. Electrical Specifications for Precision 5V Voltage Source
| Property | Specification | |||
|---|---|---|---|---|
| Number of Channels per Data Logger Type |
| |||
| Max. Tolerance | 0.04 % | |||
| Max. Output Current | 50 mA |
12.2.7. Electrical Specifications for Switches
Table 12.7. Electrical Specifications for Switches
| Property | Specification | |||
|---|---|---|---|---|
| Number of Channels per Data Logger Type |
| |||
| Switch Voltage | > 0 V | |||
| Max. Current Continuous Switch | 120 mA | |||
| Peak Switch Current (2 s) | 400 mA | |||
| Switch On Resistance | < 83 mΩ | |||
| Switch Off Resistance | > 10 MΩ | |||
| Max. Output Voltage of 5 V Output Terminal | 5.5 V | |||
| Min. Output voltage of 5 V Output Terminal | 4.7 V | |||
| Max. Output Current per 5 V Output Terminal | 15 mA |
| Important |
|---|---|
The Meteo-42 switches deliver 5 V output to supply peripheral devices inside the steel cabinet of the measurement setup. The 5 V supply is not intended to supply sensors connected with long cables due to the risk of damage caused by lightning strike. The 5 V outputs provide an electronic current limiter and an overvoltage protection. |
12.2.8. Electrical Specifications of the RS-485 Interface
Table 12.8. Electrical Specification of the RS-485 Interface
| Property | Specification | |||
|---|---|---|---|---|
| Number of busses per data logger type |
| |||
| Supply voltage | 5 V | |||
| Half-duplex bus (master) | CL1, CL2 (internal, software switchable termination resistor 120 Ω) | |||
| Full-duplex bus (master) | CL3 | |||
| Full-duplex bus (slave) | SRV/CL | |||
| Galvanic isolation | CL1, CL2, CL3, SRV/CL |
| Note |
|---|---|
Full-duplex busses can also be used as half-duplex busses. For this purpose, a corresponding external wiring is required. |
12.2.9. Electrical Specification of the Ethernet Interface
Table 12.9. Electrical Specification of the Ethernet Interface
| Property | Specification |
|---|---|
| Ethernet port | 100 Mbit/s (100BASE-TX) |
12.2.10. Electrical Specification of the USB Interfaces
Table 12.10. Electrical Specification of the USB Interfaces
| Property | Specification |
|---|---|
| USB-A1 and USB-A2 (host) | USB V2.0 Full-speed: 480 Mbps or 12 Mbps |
| USB-B (device) | Enhanced HCI (EHCI): 480 Mbps or 12 Mbps |
12.2.11. Electrical Specifications of Internal Measurements
Meteo-42 measures the Internal Supply Voltage and Internal Current of the data logger. These measurement values can be used for remote verification of the functionality of the data logger and are written to the source data and the CSV data files respectively.
Important Notes:
Internal Supply Voltage and Internal Current are recorded with 12 bit resolution only,
Internal Supply Voltage is measured directly behind a reverse polarity protection diode. This means the measured value is approximately 0.35 volt lower than the supply voltage at the logger's supply terminals.
12.2.12. Electrical Specification of the Power Supply
| Important |
|---|---|
Meteo-42 has no internal supply battery! External power supply is essential for proper operation. |
Table 12.11. Electrical Specification of the Power Supply
| Property | Specification |
|---|---|
| Supply Voltage Range | 9 V (DC)–36 V (DC) |
| Peak Supply Voltage (10 s) | 55 V (DC) |
| Note |
|---|---|
Meteo-42 has a reverse voltage protection. |
Table 12.12. Typical Power Consumption for different use cases
| Use case | Typical Power Consumption |
|---|---|
| CECS on, no sensors defined/connected, no Ethernet connected | 0.85 W |
| CECS on, different sensors, one RS-485 Interface with Biasing, Ethernet connected | 1.5 W |
| CECS off, no RS-485 | less than 0.35 W |
| CECS off, one RS-485-Interface, without Biasing, 12 V Supply | less than 0.310 W |
| CECS off, one RS-485-Interface, without Biasing, 24 V Supply | less than 0.370 W |
| CECS off, RS-485-Interfaces CL1, CL2, without Biasing, 12 V Supply | less than 0.385 W |
| CECS off, RS-485-Interfaces CL1, CL2, without Biasing, 24 V Supply | less than 0.450 W |
| CECS off, all three RS-485-Interfaces, without Biasing, 12 V Supply | less than 0.405 W |
| CECS off, all three RS-485-Interfaces, without Biasing, 24 V Supply | less than 0.460 W |
| CECS off, one RS-485-Interface with Biasing, 12 V Supply | less than 0.365 W |
| CECS off, one RS-485-Interface with Biasing, 24 V Supply | less than 0.425 W |
| CECS off, RS-485-Interfaces CL1, CL2, with Biasing, 12 V Supply | less than 0.460 W |
| CECS off, RS-485-Interfaces CL1, CL2, with Biasing, 24 V Supply | less than 0.525 W |
| CECS off, all three RS-485-Interfaces, with Biasing, 12 V Supply | less than 0.520 W |
| CECS off, all three RS-485-Interfaces, with Biasing, 24 V Supply | less than 0.570 W |
| Note |
|---|---|
When the display backlight turns on, the power consumption increases by approximately 2 W. In general: CECS adds at least 0.5 W to the power consumption. When the CECS is switched off, no power can be drawn from the USB or Ethernet ports. When 5 V output ports (Switches) are used the load at these ports must also be taken in account when calculating the power consumption of the data logger. |