What is a Transient Eliminator & do I need one?
Lightning and electrical switching transients can cause significant voltage and current surges on a communication cable. These surges can easily damage the electronic circuit components. Transient eliminators provide protection against these spikes and surges. For surge protection, use a transient eliminator whenever an ACCESS communication line leaves a building, either on an RS-232 connection (using modems) or on an RS-485 loop. Inside a building, for long distances (over 1000 feet) between devices or in electrically noisy environments, use transient eliminators for additional protection. (Refer to Appendix B for more details on transient eliminators.) Siemens recommends two transient eliminators for the ACCESS system. Both transient eliminators are made by MCG Electronics. Use the DLP-10-6V15, illustrated in Figure 5.6, for the single twisted-pair cable used in the RS-485 loops. Use the DLP-20-6V15, illustrated in Figure 5.7 for the two twisted-pair cable used between the Power Moni
