NetWave DirectView Broadcast Console Operations & Technical Manual
Revision A
2 - Installation
Harris Broadcast
2-29
PR&E
Logic Connections
The NetWave Console has four types of logic connections:
●
Channel Logic I/O (eight 12-pin MOD IV connectors on each DSP card – Figure 2-33)
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Control Room Logic (one 14-pin MOD IV connector on the Monitor & Output card – Figure 2-32) for room
warning light, external mute, dim, and talkback control
●
Studio Logic (one 14-pin MOD IV connector on the Monitor & Output card – Figure 2-32) for room
warning light, external mute, dim, and talkback control
●
Remote timer reset output and ESE or SMPTE master clock input (Figure 2-17) on a Molex connector on
the console rear panel (from the meter-clock-timer board’s J4 connector in the Console Display)
Figure 2-34 shows block diagrams and pin assignments for the four types of NetWave logic interface
connectors. All logic inputs are fully isolated by opto-couplers and accept logic commands that use +5 to
+40 volt logic. All logic outputs are solid-state “dry-contact relays” that can switch control signals of up to 60
volts, AC or DC. They cannot directly control warning lamps using 120 VAC. A warning lamp interface must
be used to connect the warning lamp.
Logic Interfaces
Figure 2-34 shows these logic interfaces, along with connectors, pin-outs, and a block diagram for each
interface:
●
Control Room
●
Studio
●
Channel Logic
●
Timer Logic
The block diagrams show the logic inputs on the left and the logic outputs on the right. The logic inputs,
noted by the (-) symbol, are active low. They are isolated by opto-couplers which are typically activated by
connecting their Enable Logic Inputs pin to +5 to +40 V.
Most logic outputs are isolated solid-state relay contacts that are commoned together through the relay
common pin, which is typically tied to ground (to generate logic low outputs) or to a logic voltage of up to 60
V at 350 mA (to generate logic high outputs). The exceptions to the relay common method are two warning
relay outputs, which are isolated solid-state dry contacts.
S5 volt supply and ground pins are on each connector, but these pins should only be used to power
isolated mic control panels. Grounds and logic voltages should always be sourced from the peripheral device
to maintain fully isolated operation.
