RM-Iso

RM-Iso
Insulation and Loop Resistance Module
with capacitance based fault location

The LANCIER Monitoring Rail-Module-Bus is a modular and robust sensor system.

Several measuring modules are mounted on a DIN rail and are directly connected to one another by means of plug-in contacts. The supply voltage, data analysis and control panel as well as their transmission to the remote measuring stations are carried out via the RM-Basic module.

The sensor RM-Iso is a measurement and monitoring device for insulation and loop resistance as well as capacitance in the LANCIER Monitoring RM bus.

A free pair in the cable that is to be monitored serves as a measuring loop, which is continuously measured by the RM-Iso module. The alarm threshold for insulation and loop resistance can be programmed with no restriction using an integrated keypad and the basic module’s display. All settings are saved in an internal EEPROM memory to prevent losses.

The RM-module calculates the remaining length of the measurement loop in case of line interruption automatically if capacitance measurement is activated. This allows for a quick cable fault location due to construction works, cable theft or sabotage.

To troubleshoot, additional adjacent external voltages can potentially be measured and the polarity of the measurement voltage can be reversed.

For the remote alarm system the RM-Iso module possesses built-in dry output contacts. Additionally it can be connected to the LANCIER Tx-Bus, a Can-Bus or a telecontrol system via Modbus.

Ordering Data

RM-Iso
Insulation and Loop Resistance Measuring Module
with control panel and signal output via dry contacts

Order-No. 074003.100
RM-Basic
Power supply, communication and display module for the RM-Bus

Order-No. 
074001.100

Technical Data

Insulation resistance Measurement range
  Resolution
0 .. 200 MΩ, fault ±10 % of measurement, ±0,2 MΩ
0,1 MΩ
Loop resistance Measurement range
  Resolution
0 .. 9,99 KΩ, fault ±3 % of measurement, ±50 Ω
10 Ω
Capacitance Measurement range
  Resolution
2500 nF, fault ±3 % of measurement, ±3 nF
1 nF
Measuring voltage90 V DC
Supply voltageby RM-Basic module
Operating temperature-20 °C .. +65 °C
Admissible ambient humidity0 .. 95 % rel. humidity, non-condensing
Displayby RM-Basic module
Signal LEDs
   2 x green / red:

  1 x blue:

Alarm / Acknowledged alarm /
Display operation insulation resp. loop
display operation
Signal outputs2 dry change-over contacts for: insulation and loop resistance
Max. switchable voltage / current100 V DC / 0,1 A DC
Dimensions RM-Iso (W x D x H)72 x 89 x 65 mm