LINETRAXX® GM420
The GM420 series loop monitor is designed to monitor the resistance of PE conductor connections in AC systems and in de-energised systems. The extraneous voltage Uf between the terminals E and KE must not exceed AC 12 V. The ohmic resistance of the conductor loop and the AC extraneous voltage Uf, if existing, will be indicated on the display. The currently measured value is continuously indicated on the LC display. If the measured resistance value increases above the set response value, the alarm will be activated and stored. Adjustable time delays allow installation-specific requirements to be considered.
The GM420 series loop monitor is designed to monitor the resistance of PE conductor connections in AC systems and in de-energised systems. The extraneous voltage Uf between the terminals E and KE must not exceed AC 12 V. The ohmic resistance of the conductor loop and the AC extraneous voltage Uf, if existing, will be indicated on the display. The currently measured value is continuously indicated on the LC display. If the measured resistance value increases above the set response value, the alarm will be activated and stored. Adjustable time delays allow installation-specific requirements to be considered.
Features
- Loop monitoring of the protective conductor in AC systems
- Measuring circuit with high resistance to external voltage and display of the external voltage
- Adjustable start-up, response and off-delay
- Adjustable switching hysteresis
- Digital measured value display via multi-functional LCD display
- Preset function (automatic basic parameterization)
- Indicator LEDs for operation, Alarm 1, Alarm 2
- Measured value memory for trigger value
- Permanent self-monitoring
- Internal test/reset button
- 2 separate alarm relays 1 changeover contact each
- Quiescent/working current and fault memory behavior selectable
- Password protection for device setting
- Seal-able transparent cover
- 2-module housing (36 mm)
- Spring terminal (two terminals per connection)
- RoHS compliant
Applications
- Loop monitoring for motors
- Loop monitoring in electrical systems for PE conductor interruption
- Monitoring of earthing systems
LINETRAXX® GM420 Variant(s)
| Type | Measuring range loop resistance | measuring range interference voltage | supply voltage US | Art. no. * |
|---|---|---|---|---|
| GM420-D-1 | 0...100 Ω | AC 0...50 V | DC 9.6 V...94 V / AC 16...72 V, 15...460 Hz | B73082001 B93082001 |
| GM420-D-2 | 0...100 Ω | AC 0...50 V | DC 70...300 V / AC 70...300 V, 15...460 Hz | B73082002 B93082002 |
*(B7... = spring terminal / B9... = screw terminal)
Optional Accessories for LINETRAXX® GM420
| Type | Art. No. |
|---|---|
| Mounting clip for screw mounting (one piece per device) | B98060008 |
| Mounting frame XM420 | B990994 |
Downloads for LINETRAXX® GM420
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| GM420 | Quickstarts | 611.1 KB | EN | 2023/10/0505.10.2023 | D00112 |
| GM42x | CE Declarations of Conformity | 87.0 KB | 2022/08/1212.08.2022 | ||
| GM420 | Manuals | 2.0 MB | EN | 2023/10/1111.10.2023 | D00112 |
| GM420 | Datasheets | 273.6 KB | EN | 2019/05/1313.05.2019 | D00112 |
| Changed variants of relays from goldplated to silver-plated contacts | Technical Information | 166.3 KB | EN | 2022/06/2727.06.2022 |