Network control annunciator-2; 640 characters; on a single panel (one CPU2-640) NFS2-640 systems, the NCA-2 can be the primary display for the panel and connects directly to the CPU2-640. On network systems, one network display (either NCA-2 or NCS) is required and each NCA-2 connects to and requires an NCM network control module. Mounts in a row of FACP node or in 2 annunciator module positions. Mounting options include: NCA/640-2-KIT (direct mounting to the CHS2-M2), CA-2, ADP-4B or in an annunciator box such as the ABS-4D or ABF-4B