Grass Valley Maestro Master Control Installation v.2.4.0 - Manual (Page 77)

MAESTRO Installation and Service Manual 77
Customer Requirements
It is also possible for one Maestro processor to control another. See
Figure 29 .
Figure 29. Maestro-to-Maestro GPIO Connections
Note Although the diagram above depicts two separate Maestro frames, the con-
trolling and controlled Maestro processor may be located in same frame
The controlling Maestro would be configured to send a "Transition in Prog-
ress” signal (that is, by closing a GPO port relay) to indicate that the
Maestro has initiated a Take.
The controlled Maestro would be configured to accept a “Transition” signal
and respond by executing a Take command.
Controlling Maestro
GPO Port/Relay
See Notes
1A
1B
Note 1
Connections between Maestro
GPIO Connector and controlled
external device are bipolar.
Note 2
Maximum current through Maestro relay = 250 mA
Maximum voltage for relay = 10 V
"Transition in Progress" signal
Controlled Maestro
GPI Port/Photocoupler
See Notes
1A
1B
Note 3
Maximum current through Maestro photocoupler = 4.25 mA
"High" range for photocoupler = 3-10 V
"Transition" signal
220 ohm
1/8 W
resistor
+
-
5 V
External
power