Grass Valley Kayak HD Installation v.6.8.8 - Manual (Page 63)

Kayak HD — Installation and Service Manual 63
GPI / Tally Connections
Although the diagram above implies mechanical relays, the actual outputs
are implemented with solid state relays. Interface specifications are:
Maximum current for any one output: 1 amp AC/DC
Maximum current for any one common: 2 amp AC/DC.
Maximum off (open circuit) voltage between output and common: 60
Volts peak.
Maximum voltage between any point and ground (chassis): 60 Volts
peak.
The solid state relays are bidirectional; either polarity voltage can be
applied. If the switcher GPI / Tally outputs are used to drive downstream
DC relays, be sure to install diodes across the relay coils to clamp inductive
spikes. Shielded cable is recommended for the connection from the
switcher to the user tally system.
Each output can be programmed for function, steady state or pulse, output
polarity, and pulse duration.
Refer to the Install Menus section of the Kayak HD User Manual for details
on setting the characteristics of the output signal (steady state, polarity,
pulse duration, etc.).
Refer to the Configuration Menu section of the Kayak HD User Manual for
details on setting the function of a GPO / Tally output (tally, auto trans,
recall register, and so forth).