æ 3-1-10 æInstallation of 3DHEXUThis section provides information on installing External Music On Hold in the TX-Z 308 system.Specifications:ü Input Impedance: 600 ohmsü Input Level: Nominal 250 mV (-10 dBm)ü Maximum Input: 1 Vrms1. Connect input from external MOH source to the connector on the 3DHEXU unit labeled EXMOH.2. Set SW1 strap to the EXT position. (If the External MOH is not required, set to the INT position.)3. Adjust the output level of External MOH Source.Note: The relay contacts RL1 and RL2 can be used as MOH device control. The remote controlterminal on the device must be connected to these contacts. (See Program No. 56)This section provides information on the installation of an external alarm.An alarm can be connected to the system. Programming determines if the alarm inputs require an openor a closed circuit.Specifications:ü Loop Resistance: Less than 100 ohms. (Do not supply external power.)ü Open Resistance: More than 5 kohms. (Do not supply external power.)After Wiring1. Put the housing and cover back and secure the screws.2. Plug the AC cord into an AC outlet.The cable holderto fix the wires.Removing the knock-outpanel.NX7E-3DHEXU-A1 unitSW1VR4 VR3 VR1
