2 |
Making the Bus Connections
The HHM connector has two sets of terminals; one for incoming cable and the other for outgoing cable.
Connect the Serial 1, Serial 2, and Shield In terminal of either connector to the previous device. Connect the Serial 1, Serial 2, and Shield Out terminal of the other connector to the next device.
When making bus connections, the maximum exposed length of bare wires should be two inches. For added protection, each shield drain wire should be insulated with spaghetti tubing to prevent the Shield In and Shield Out wires from touching each other.
The following illustration shows connections for incoming and outgoing serial bus cable. As with other devices, the HHM connector may be at either end of its bus. If it is, there will only be one bus cable attached.
Bus In
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X1 |
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| SB |
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X1 | X2 | SA | SB |
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Bus Out
X1 | Serial 1 |
X2 | Serial 2 |
SA | Shield In |
SB | Shield Out |
As with other devices, if the HHM Connector is at either end of its bus, install an appropriate terminating resistor across the Serial 1 and Serial 2 terminals. The Genius I/O System and Communications User's Manual lists appropriate terminating resistors for each recommended bus cable type.
