Innovative technologies for safe handling of electrical power to achieve high availability

We offer you first-class quality and safety combined with global service and every support in resolving your monitoring problems.

  • Electrical safety for unearthed power supplies (IT systems)
  • Insulation monitoring equipment, insulation fault location systems
  • Power supplies for medical applications
  • Measuring and monitoring relays
  • Electrical safety for earthed power supplies (TN systems)
  • Using renewable energies efficiently: wind power, photovoltaics
  • Test systems for electrical equipment and medical technology


  • Amplification RS-485 signal

The RS-485 interface repeater DI-1PSM is designed for signal amplification on the RS-485 interface (BMS bus). This is required when the network distance exceeds a length of 1200 m and when more than 31 bus nodes exist.


  • Plastic enclosure for DIN rail mounting
  • Dynamic baud rate setting
  • Galvanic separation between the input and output circuit and the power supply – overvoltage protection
  • Supply voltage 85…260 V, AC 50…60 Hz


  • Extension of the maximum possible bus length by 1200 m in BMS systems (EDS, RCMS, MEDICS® systems)
  • Extension of the maximum possible bus nodes by 31
  • Protection against spikes by galvanic separation between the input and output circuit and the power supply

Downloads for DI-1DL

CE Declarations of conformity DI-1DL 74.3 KB 2022/08/12 06:17:2412.08.2022 06:17:24
Datasheets DI-1DL 266.8 KB DE2019/05/13 10:31:3413.05.2019 10:31:34D00125
Datasheets DI-1DL 265.1 KB EN2019/05/13 10:31:3513.05.2019 10:31:35D00125
Datasheets DI-1DL 224.3 KB ES2019/05/13 10:31:3713.05.2019 10:31:37D00125
Manuals DI-1DL 497.3 KB DE2019/05/13 10:31:4113.05.2019 10:31:41D00125
Manuals DI-1DL 497.3 KB EN2019/05/13 10:31:4113.05.2019 10:31:41D00125

DI-1DL Variants

TypeSupply voltage USArt. No.
DI-1DLAC 85…260 V, 50…60 HzB95012047