Model 5600ACO2 Automatic Changeover Unit
2.4.8. Synchronizing the Menu Settings of the Two 5600MSC Units
In the event of a changeover occurrence, it is necessary that all outputs on one 5600MSC have the
same timing as those on the other. Identical timing for both 5600MSCs is assured by locking both to the
same frequency and phase source (e.g. GPS or by genlocking one to the other). Identical phasing of
the independent black outputs is assured by implementing the Syncro mode in the 5600MSCs. To use
this mode, connect both 5600MSC communication ports together using the WA05600Synchro cable
supplied with the 5600ACO2 or make your own as shown in Table 2-5. On the 5600MSC connected to
the A inputs of the 5600ACO2, set the Serial Port Mode to Synchro Tx. On the 5600MSC connected to
the B inputs of the 5600ACO2, set the Serial Port Mode to Synchro Rx. The system configuration of
both units can now be accomplished by setting the menu items of the Master A unit only. Most of the
menu settings on the Master B unit can be viewed but cannot be changed. These menu items will be
dimmed when they are viewed on the Master B unit. Menu items of the Master B unit that can be
changed will be shown in the normal display brightness. See the 5600MSC manual for a full
description of Synchro mode operation.
5600MSC
SynchroRx End
5600MSC
SynchroTx End
9 pin D
Male
Pin Belden
9501
9 pin D
Male
Pin
1 1
TxD 2 -------1b------ RxD 3
RxD 3 -------1a------ TxD 2
4 4
Gnd 5 ---drain---- Gnd 5
6 6
RTS 7 CTS 8
CTS 8 RTS 7
9 9
Frame Gnd Shield ---drain---- Frame Gnd Shield
Table 2-5: WAO5600Synchro Cable
2.5. CONNECTING THE GENERAL PURPOSE INPUTS AND OUTPUTS
The 12 pin terminal strip connector has 2 general purpose inputs and 2 general purpose outputs for
control/status of the Auto-changeover, as well as the GPI inputs and outputs from the two 5600MSC
units. The signals on the top row of the connector are for the 5600ACO2 only and do not connect to the
5600MSC units. (See section 3.3) The signals on the bottom row of the connector are connected
directly to the 5600MSC units (see section 2.4.5). The GPI cables can be secured into the removable
portion of the terminal strips using a small screwdriver. The removable part of the terminal strip is then
inserted into the rear panel.
The GPI inputs are considered high if you leave an input floating (not connected) or pull it up to +5
volts. The GPI inputs are considered low when the GPI input is below 0.8 volts. The user can make the
GPIs low simply by connecting the GPI input pins to ground using a button, switch, relay or an open
collector transistor. Figure 2-2 shows the circuitry for each of the GPI input pins.
INSTALLATION
Revision 1.3 Page 2-7
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