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Section 2 — Installation
Turning Tally Expansion Option On
When all the Tally Expansion Chassis are installed and set up:
1. Turn the power off to the switcher frame and plug the control cable into
J2 on the GPI Module (C4 on the back of the switcher frame).
2. Turn the switcher power back on.
3. At the rear of each Tally Expansion chassis plug both power cords into
the chassis and a source of power (90 to 132 VAC or 180 to 264 VAC).
The power supplies automatically selects either 115 or 220 volt source,
depending on the input.
4. At the front of each Tally Expansion chassis, open the door, turn on
both power switches, and verify that both power supply lamps are lit.
Maintenance Terminal Connections
The Maintenance port allows a text-only monitor to be connected to the
switcher frame. The monitor is normally used for maintenance purposes
only. Refer to Figure 2-38.
1. Connect a cable from the input port of a RS-232 terminal to J1
(MAINTENANCE port) on the GPI Module in Slot B4.
The Data cable must be wired in a standard RS-232 configuration with pin
assignments as follows:
■ Pin 1 — Protective Ground
■ Pin 2 — TxD (From the Terminal)
■ Pin 3 — RxD (To the Terminal)
■ Pin 7 — Signal Ground
2. Ensure that the settings of the terminal matches the parameters of the
Model 2200 given below:
■ 9600 baud
■ 8 data bits
■ 1 stop bit
■ No parity
See the monitor’s manual for its settings.
Figure 2-38. Maintenance Terminal Connectors
GPI
MAINTENANCE
TALLY EXP
1
2
3
4
G
GPI INPUTS
J1
+5
J2
1
2
3
4
G
+5
TB1
TB2
GPI OUTPUTS
TB3
1
2
3
4
G
TB4
1
2
3
4
G
C4
G
G