Grass Valley Maestro Master Control Installation v.2.4.0 - Manual (Page 96)

96 MAESTRO Installation and Service Manual
Section 2 — Installation Planning
Positronic Industries
Connector housing description - CONN F/M Cable 44PIN DSUB; part
number - DD44M00GEX/AA
Connector pins description - CONN O/M PIN 22-30AWG CRIMP; part
number - MC8022D/AA
GPIO Port
Figure 43. GPIO Port Circuitry. For Pinouts see page 95 .
V CC
From
Maestro
logic
GPIO
rear panel
connector
To
Maestro
logic
V OUT
ON = 3-10 V, 4.25 mA max.
Input photocoupler
NEC PS2705-1
Maximum current through relay = 250 mA
Maximum voltage for relay = 24 V
Output relay
International Rectifier PVG613
2.2 K, 0.1 W
B
A
10K
Note: Use pins "A" and "B" only when
connecting Maestro to an external device
Do not connect a third conductor as a
common ground path (e.g., do not
connect the connector shields).