MV-841/851 User Manual
LTC and GPIO Connector Pin-outs
Hardware Modules
Issue 1 Revision 1
Page 27
© 2020 Grass Valley, a Belden Brand
Table 10
Screw Terminal Connector for LTC and GPIO
Screw Terminal
Number
Signal
1
GPI 1
2
GPI 2
3
GPI 3
4
GPI 4
5
+5 V DC Out
6
GND
7
LTC+
8
LTC-
9
nc
10
nc
Note:
‘nc’ denotes a “not connected” terminal.
Note:
MV-841/851 GPI outputs - Open collector outputs. Require external
pull-up resistors of value between 10 k
Ω
and 100 k
Ω. Each output can
sink up to 100 mA.
•
“+5 Vdc Out” pins are provided on the connector for this
purpose.
•
Maximum voltage, +5 V.
•
See Section "Example: Driving LEDs from the GPI Outputs" for
an example of how GPI outputs can be used to drive LEDs.
MV-841/851 GPI inputs - Inputs have weak internal pull-down resis-
tors.
•
Can be driven by input voltages of up to +5 V.
•
A logic “low” input is represented by an input voltage below
+0.8 V.