The RM 32 by EMC Partner is required for the ESD3000 to test up to 30kV. This relay module is required for the networks beginning with "DN", including the DN-1, DN-2, DN-3, and DN-6. It allows for testing to IEC 61000-4-2, ISO 10605, MIL-STD-461, MIL-STD-883, and many others.