evertz TR-4800E - Optional Tr4800-Bhp Bulkhead Panel; Figure 2-10: Optional TR4800-BHP Bulkhead Panel; Table 2-4: Rear GPI Input Electrical Specifications

TR-4800E
Tally Router
Page - 18 Revision 1.1
Maximum GPI Voltage
+24 Volts DC
Maximum Reverse GPI Voltage
-24 Volts DC
Voltage to Turn GPI On
> +2.0 Volts
Voltage to Turn GPI Off
< +1.0 Volts
GPI Current
~3mA @ +5V
~9mA @ +12V
~20mA @ +24V
Table 2-13: Rear GPI Input Electrical Specifications
3.9 OPTIONAL TR4800-BHP BULKHEAD PANEL
The TR4800-BHP is an separate ordering item that is used to break out the 48 General Purpose
Outputs and 32 General Purpose Inputs from the five 37-pin D-Sub connectors on the rear of the tally
router. It Is shipped with five 6-foot (2 meter) cables to allow remote placement of the bulkhead panel.
There is an LED to indicate if Wet Power is currently present. Each GPO and GPI can be switched
between Wet and Dry modes by means of slide switches. All GPIO are broken out to 2-pin removable
terminal blocks to allow easy wiring and re-wiring of the panel. A cable strain relief bar runs across the
middle of the panel to provide a tie point for cables to prevent accidental removal.
Figure 2-10: Optional TR4800-BHP Bulkhead Panel

When connecting the rear D-Sub cables, be careful to connect the correct port on
the rear of the Tally Route to the same port on the rear of the TR4800-BHP.