Graphtec GL860
Isolated/multifunction input data logger with 20—200 channels
Standard configuration: 20 multi-function analog inputs (expandable to 200 channels by using additional extension modules) and 4 pulse counting inputs. Data storage: internal Flash memory 4GB or SD Card port (max. 32 GB). Networking facilities: Web & FTP Server, optional Wireless LAN communication. Two models: GL840-ME (for temperature, humidity, voltage) and GL840-WV (same as ME model but with max. 300V CAT III input overvoltage protection and improved measurement accuracy).
Standard configuration: 20 multi-function analog inputs (expandable to 200 channels by using additional extension modules) and 4 pulse counting inputs. Data storage: internal Flash memory 4GB or SD Card port (max. 32 GB). Networking facilities: Web & FTP Server, optional Wireless LAN communication. Two models: GL840-ME (for temperature, humidity, voltage) and GL840-WV (same as ME model but with max. 300V CAT III input overvoltage protection and improved measurement accuracy).
- 4 types of input terminals lineup including 30CH for the first time!
- Expandable from 20ch to max. 200ch, enabling measurement of various phenomena.
- Compatible with remote control service G-REMOTE.
- 6 new features:
Faster sampling interval, Memory loop functions, CH copy function, Alarm history, Inter-CH operation, Modbus communication
- Wireless measurement from your PC is available with the optional wireless LAN unit.
All Channel Isolated / Universal Input, Standalone Multi-Channel
Voltage, temperature, and humidity can be selected for each input channel.Use EU scaling for other measurement parameters.
Measure voltage
Supports wide operating range (from 20 mV to 100 V)
Supports wide operating range (from 20 mV to 100 V)
Measure temperature
Thermocouple: K, J, E, T, R, S, B, N, C(old W:WRe5-26)
RTD*: Pt100・JPt100・Pt1000(IEC751)
(only 3 wire type is supported)
*Please use B-565 for connecting the RTD
Thermocouple: K, J, E, T, R, S, B, N, C(old W:WRe5-26)
RTD*: Pt100・JPt100・Pt1000(IEC751)
(only 3 wire type is supported)
*Please use B-565 for connecting the RTD
Measure current (4 -20 mA)
Shunt resistor (250Ω) is available as an option.
Equipped with a dedicated 1-5V range for the measurement range

Shunt resistor (250Ω) is available as an option.
Equipped with a dedicated 1-5V range for the measurement range
Shunt resistance 250Ω (B-551)
*Cannot be used with the screwless terminal
*Cannot be used with the screwless terminal
Measure humidity
A humidity sensor is available as an option.
Power for the sensor is also supplied from the main unit.
Equipped with a dedicated humidity range
Power for the sensor is also supplied from the main unit.

Equipped with a dedicated humidity range
Humidity sensor (B-530)
Digital I / O can be used by connecting an optional I / O cable.
Input/Output cable (B-513)
<Logic/Pulse inputs (4 channels)>
Logic: No-voltage contact (A contact, B contact, NO, NC) ,Open collector, Voltage input (H.L decision)
Pulse: 3 types of selections (Rotation / Quantity count / Instantaneous) per channel
Alarm conditions can be set for each input channel.
Signal output from outputs 1 to 4 is possible in the event of an alarm.
Logic: No-voltage contact (A contact, B contact, NO, NC) ,Open collector, Voltage input (H.L decision)
Pulse: 3 types of selections (Rotation / Quantity count / Instantaneous) per channel
Alarm conditions can be set for each input channel.
Signal output from outputs 1 to 4 is possible in the event of an alarm.
Flexible Options with 4 Terminals
4 types of terminals including high withstand voltage B-565 are lined-up.Select the terminal that best suits your measurement application.
Terminal Specification Comparison
![]() WITHSTAND HIGH-VOLTAGE HIGH-PRECISION TERMINAL (B-565) |
![]() 30CH SCREW LESS INPUT TERMINAL (B-563SL-30) |
![]() 20CH SCREW INPUT TERMINAL (B-563) |
![]() 20CH SCREWLESS INPUT TERMINAL (B-563SL) |
|||||||
| Number of input channels | 20ch | 30ch | 20ch | 20ch | ||||||
| Input terminal type | M3 screw-type | Screwless | M3 screw-type | Screwless | ||||||
| Input method | Photo MOS relay scanning system All channels isolated, balanced input |
|||||||||
| Measurement ranges ※1 | Voltage | 20, 50, 100, 200, 500 mV, 1, 2, 5, 10, 20, 50, 100 V, 1-5 V F.S. | ||||||||
| Temperature | Thermocouples:K, J, E, T, R, S, B, N, C (W: WRe5-26) | |||||||||
| RTD (only 3 wire type is supported) : Pt100, JPt100, Pt1000(IEC751) | (* RTD cannot be connected.) | |||||||||
| Temperature range: 100°C, 500°C, 2000°C (In the case of Fahrenheit: 150°F, 750°F, 3000°F) | ||||||||||
| Humidity | 0 to 100% (Optional humidity sensor B-530 is required) | |||||||||
| Maximum permissible input voltage | Between +/– terminals | 20mV to 2V range (60Vp-p) 5V to 100V range (110Vp-p) |
||||||||
| Between input terminal/input terminal | 600Vp-p | 60Vp-p | ||||||||
| Between input terminal/GND | 300Vp-p | 60Vp-p | ||||||||
| Withstand voltage | Between input terminal/input terminal | 600Vp-p | 350Vp-p 1 minute | |||||||
| Between input terminal/GND | 2300VACrms 1 minute | 350Vp-p 1 minute | ||||||||
| Voltage measurement accuracy | ±(0.05%ofF.S.+10μV) | ±0.1% of F.S. | ||||||||
| Operating environment | 0 to 45℃ | |||||||||
| Dimensions(*including GL860) | 240×166×52.5mm (exclude protrusion) | 240×158×52.5mm (exclude protrusion) | ||||||||
| Weight(*including GL860) | 1035g (exclude AC adapter & battery) | 1010g(exclude AC adapter & battery) | ||||||||
*Please refer to the user manual for the measurement accuracy of each terminal.
Easier and Faster to use
Multi-CHANNEL Measurement
- Flexible Options with many Types of Terminals
4 types of input terminals lineup including 30CH for the first time!
Expandable from 20ch to max. 200ch, enabling measurement of various phenomena.
Compatible with remote control service.
6 new features:
- Faster sampling interval
- Memory loop functions
- CH copy function
- Alarm history
- Inter-CH operation
- Modbus communication
Wireless measurement from your office leptop/PC is available with the optional wireless LAN unit B-568.
The New GL860
All channels are isolated, support multi-function input and expandable from 20ch to max. 200ch, enabling measurement of various phenomena.
4 types of input terminals lineup including 30CH highprecision terminal and withstand high-voltage.
GL860 is compatible with new Remote control service G-REMOTE, which makes your measuring more efficient.

*GL860 with optional items B-565
New Input Terminals
Expandable up to 200 channels by combining 20 and 30CH terminals,
allowing you to configure the number of channels that matches your
measurement situation.


40ch *using B-565
Channel Configuration Example (*case: use both 20 ch and 30ch terminals)
When using B-565 with other terminals,
- Withstand voltage: lower withstand voltage will be applied
- Accuracy: depends on the terminal
Connection cable for extension terminal
The input terminal unit and the GL860 can be extended by using
a connection cable for extension terminal (50cm, 2m).

Connection cable for extension terminal *Optional

B-567-05 B-567-20
All channels are isolated, support multi-function input and expandable from 20ch to max. 200ch, enabling measurement of various phenomena.
4 types of input terminals lineup including 30CH highprecision terminal and withstand high-voltage.
GL860 is compatible with new Remote control service G-REMOTE, which makes your measuring more efficient.

*GL860 with optional items B-565
New Input Terminals
Expandable up to 200 channels by combining 20 and 30CH terminals,
allowing you to configure the number of channels that matches your
measurement situation.


40ch *using B-565
Channel Configuration Example (*case: use both 20 ch and 30ch terminals)
| Number of channels |
20Ch | 30Ch | 40Ch | 50Ch | 100Ch | 200Ch |
| GL860 | 1 unit | 1 unit | 1 unit | 1 unit | 1 unit | 1 unit |
| Connection cable for extension terminal |
- |
- |
1 unit |
1 unit |
1 unit |
1 unit |
| Extension Terminal Base (B-566) |
- |
- |
2 units | 2 units | 4 units | 7 units |
| 20 ch Terminal | 1 unit | - | 2 units | 1 unit | 2 unit | 1 unit |
| 30 ch Terminal | - | 1 unit | 1 unit | 1 unit | 2 unit | 6 unit |
- Withstand voltage: lower withstand voltage will be applied
- Accuracy: depends on the terminal
Connection cable for extension terminal
The input terminal unit and the GL860 can be extended by using
a connection cable for extension terminal (50cm, 2m).

Connection cable for extension terminal *Optional

B-567-05 B-567-20
| Optional accessories | |
| B-563SL-30 | NEW 30 CHANNELS SCREW LESS INPUT TERMINAL |
| B-565 | WITHSTAND HIGH-VOLTAGE HIGH-PRECISION TERMINAL |
| B-563 | 20 CHANNELS INPUT TERMINAL |
| B-563 SL | 20 CHANNELS SCREW LESS INPUT TERMINAL |
| B-564 | 20 CHANNELS INPUT TERMINAL |
| B-564 SL | 20 CHANNELS LARGE INPUT TERMINAL |
| B-568 | GL wireless LAN unit - Standard: IEEE802.11b / g / n communication distance: approx. 40m (Depends on the situation) |
| B-551 | Shunt resistor - only for terminals with M3 screw ( Cannot be used with screwless terminals !! ) |
| B-567-05 | Connection cable for extension terminal (50cm) |
| B-567-20 | Connection cable for extension terminal (2 m) |
| B-573 | Battery Pack |
| B-570 | Bracket for DIN rail for main body |
| B-540 | Bracket for DIN rail (for B-566) |
| B-513 | Input/Output cable for GL series |
| B-514 | DC drive cable |
| B-530 | Humidity sensor(*4 Available temperature range: - 25C to +80C (Special order/ 10m, 15m, 20m available) |
| B-581 | midi LOGGER storage case |
| ST-55K-TC-1.2M | Ultra-fine K type thermocouple - tip wire φ0.127, 0.5X0.7X200mm, relaying 1m, -40 -260C, class2, 5 units |
| B-551-10 | Shunt resistor 250Ω (0.1%), Rated power of 1 W Maximum operating voltage 15.8V (*7 - Atention - only 1 shunt resistor per channel is required. Cannot be used with screwless terminals) |
| ACADP-20 | AC adapter for GL860 - Adapter for maintenance |
| Documents | |
| Downloads | GL860_EN |
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