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 PE conductor in AC systems
- Measuring circuit providing a high resistance against extraneous voltages and indication of extraneous voltages
- Adjustable start-up delay, response delay and delay on release
- Adjustable switching hysteresis
- Digital measured value display via multi-functional LC display
- Preset function (automatic setting of basic parameters)
- LEDs: Power On, Alarm 1, Alarm 2
- Measured value memory for operating value
- Continuous self monitoring
- Internal test/reset button
- Two separate alarm relays with one changeover contact each
- N/C or N/O operation and fault memory behaviour selectable
- Password protection for device setting
- Sealable transparent cover
- Two-module enclosure (36 mm)
- Push-wire terminal (two terminals per connection)
- RoHS compliant
Applications
- Loop monitoring of motors
- Loop monitoring of PE conductor connections for wire interruptions in electrical installations
- 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… = push-wire terminal / B9… = screw-type 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 | DE | 2023/10/0505.10.2023 | D00112 |
| 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 | 1.8 MB | DE | 2023/10/1111.10.2023 | D00112 |
| GM420 | Manuals | 2.0 MB | EN | 2023/10/1111.10.2023 | D00112 |
| GM420 | Datasheets | 319.1 KB | DE | 2019/05/1313.05.2019 | D00112 |
| GM420 | Datasheets | 273.6 KB | EN | 2019/05/1313.05.2019 | D00112 |
| GM420 | Datasheets | 275.5 KB | ES | 2019/05/1313.05.2019 | D00112 |
| GM420 | Datasheets | 509.9 KB | ZH | 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 | |
| Geänderte Relaisvarianten von vergoldeten Kontakten auf versilberte Kontakte | Technical information | 166.3 KB | DE | 2022/06/2727.06.2022 |