4-3
Standard System (3) Homerun Wiring
[1] 4-way video junction unit GH-4Z
•For the terminating GH-4Z (maximum of 6 units per trunk), set the setting switch (SW1) to "A".
[2]Residential station GH-1KD, GH-1AD, GH-1MD
• For GH-1KD, set the setting switch (SW1) to "A".
[3]Short lead
•To use the emergency alarm switch (see 11-7 for details), disconnect the short lead and connect the switch.
[4]External signaling relay GH-RY For details, see 4-5.
The separate option connecter is required. [5] Doorbell
Do not mix homerun wiring with station-to-station wiring on the same trunk line.
NP: Non-polarized
