Grass Valley HD Wireless - Manual (Page 30)

30 HD Wireless User’s Guide (v6.2)
Chapter 2 - Installation
Dry contact
* a common return (not ground!) can be used for the three functions.
Figure 2-14. Dry contact signalling
Common ground
* use either Send or Return only, do not mix.
Figure 2-16. Common ground signalling
Table 2-13. Dry contact (no ground, no voltage)*
Menu setting Input shorted Input open
LH Function ON Function OFF
HL Function OFF Function ON
Table 2-15. Common ground (connect one lead only to ground)*
Menu setting Input grounded Input open
LH Function ON Function OFF
HL Function OFF Function ON
External
signaling
dry contact
base station
signaling
connector
Signal 1
Signal 2
Signal n
Common
External On-Air
signaling with
common contact
Base Station
signalling
connector