The dual redundant +24 Vdc system power, taken from the chosen power source, is connected to the controller at two plugs labeled PWR-1 and PWR-2 on the processor base unit:

The processor base unit has a link between the +24 Vdc connections to the center terminal of each connector PWR-1 and PWR-2. This link may be useful to connect the +24 Vdc supply to further devices:

For each power supply connection, do the following:

• Connect the negative line from the power supply, typically labeled ‘0 V’, to the left-hand terminal.

• Connect the positive line from the power supply, typically labeled ‘+24 V’, to the right-hand terminal.

• Apply a minimum tightening torque of 0.5 Nm (0.37 ft. lb.) to the terminal screws.

Procedure to Connect Serial Communications Cabling

The serial ports (S1-1 and S1-2; S2-1 and S2-2; S3-1 and S3-2) support the following signal modes depending on use:

• RS485fd: A four-wire full duplex connection that features different busses for transmit and receive. This selection must also be used when the controlleris acting as a MODBUS Master using the optional four- wire definition specified in Section 3.3.3 of the MODBUS-over-serial standard.

• RS485fdmux: A four-wire full-duplex connection with tri-state outputs on the transmit connections. This must be used when the controller is acting as a MODBUS Slave on a four-wire bus.

• RS485hdmux: A two-wire half duplex connection applicable for master slave or slave use. This is shown in the MODBUS-over-serial standard.

Each processor uses the two serial ports above it on the baseplate. Data is not mirrored between ports. Therefore a single processor system has two ports available, a dual processor system has four ports and a triple processor system has six ports available to it.

Connect the serial communications cabling to the six plugs labeled S1-1 through S3-2 on the T9100 processor base unit.

• For each serial communications connection, connect the cabling according to the following Serial Communications Illustration.

• Apply a minimum tightening torque of 0.22 Nm (0.16 ft. lb.) to the terminal screws.

• Make sure the length of the cable does not exceed 1,200 m (3,900 ft.).

Connecting MODBUS Slave Devices to Serial Ports

You can use a full duplex or a half-duplex connection for a MODBUS Slave device on a serial port.

Connect a Slave Device, Full Duplex

You can use a full duplex serial connection to connect one MODBUS Slave device to the AADvance controller. To make the physical connection, do the following:

1. Select an applicable cable. We recommend 3-pair, overall shielded cable

2. Remove the serial port connector from the T9100 processor base unit.

3. Make the connections shown in the illustration. Terminate the twisted pairs with a 120 Ω resistor in series with a 68 nF capacitor at the receiver ends.

4. Connect the signal ground (not illustrated) from the 0 V terminal to the slave device.

Connect Multiple Slave Devices, Full Duplex

You can use a full duplex serial connection to connect multiple MODBUS Slave devices to the AADvance controller. To make the physical connection, do the following:

1. Select an applicable cable. We recommend 3-pair, overall shielded cable.

2. Remove the serial port connector from the T9100 processor base unit.

3. Make the connections shown in the illustration. Terminate the twisted pairs with a 120 Ω resistor in series with a 68 nF capacitor at the receiver ends

4. Connect the signal ground (not illustrated) from the 0 V terminal to the slave device.

5. Insert the connector into the T9100 processor base unit.

Connect a Slave Device, Half Duplex

You can use a half-duplex serial connection to connect a single MODBUS Slave device to the AADvance controller. To make the physical connection, do the following:

1. Select an applicable cable. We recommend 3-pair, overall shielded cable.

2. Remove the serial port connector from the T9100 processor base unit.

3. Make the connections shown in the illustration. Terminate the twisted pairs with a 120 Ω resistor in series with a 68 nF capacitor at the receiver ends.

4. Connect the signal ground (not illustrated) from the 0 V terminal to the slave device.

5. Insert the connector into the T9100 processor base unit.
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