Title: Hardware Installation Guide.pdf
Input 2 and Input 1 are both simple N/C (normally closed) contact closure monitors.Wire the Input 2 and Input 1 contacts using twisted pair cable, 30 ohms maximum. (No EOL resistors are required.)Note:If either of these inputs is not used, a shorting wire should be installed.Unsupervised Alarm Input Wiring.CABINET TAMPERGNDIN 2POWER FAULTGNDIN 114.1.2Upstream Host CommunicationThe ISC uses Port 1 to communicate to the host system. Port 1 can be wired as an RS-232 interface for direct one-to-one (or modem) communication, or as an RS-485 interface for multi-drop or extended distance communication.revision 6 — 79LNL-1000 Intelligent System ControllerDirect-connect RS-232 cables should be no longer than 50 feet. Leased lines or fiber optics can also be used.