Allen-Bradley 2711-T9A8 Operator Terminal

The Allen-Bradley 2711-T9A8, also cataloged as the 2711T9A8 operator interface, operates as a dedicated hardware component for touch-screen process visualization, operator data entry, and industrial control network communication within PanelView Standard platforms.

Suffix Breakdown & Model Matrix

• 2711: Base product family identifier designating Allen-Bradley PanelView Standard operator terminals.
• T: Operator input interface type featuring an analog resistive touch screen display configuration.
• 9: Display size classification corresponding to a 9-inch viewing area.
• A: Monochrome display technology supporting high-contrast grayscale graphical visualization.
• 8: Communication protocol architecture incorporating Data Highway Plus (DH+) and RS-232 serial interfaces.

Hardware Specifications

Allen-Bradley Industrial Control and Drive Communication Integration

The 2711-T9A8 terminal is engineered to interface directly with industrial control networks using built-in Data Highway Plus (DH+) and RS-232 communication ports. Designed to handle deterministic token-passing communication across industrial data highways, the internal communication processor maintains backplane bus communication velocity and real-time data frame synchronization with host programmable logic controllers. The physical layer design includes channel-to-channel electrical isolation and surge voltage suppression across serial and network lines, ensuring deterministic data transfer in environments subjected to severe electromagnetic interference.

Frequently Asked Questions

Q: Does the 2711-T9A8 terminal support direct connection to 24 VDC power sources?

A: No. The 2711-T9A8 model requires a nominal AC line voltage input ranging from 100 to 240 VAC at 50/60 Hz. Connecting 24 VDC directly to this terminal will result in power supply failure.

Q: What are the primary cable termination requirements for the Data Highway Plus (DH+) network port on this terminal?

A: The DH+ network trunk line must be terminated at both physical ends using 150-ohm, 0.5-watt resistor networks across the blue and clear signal conductors to eliminate signal reflections and maintain protocol integrity.

Field Installation Guidelines

1. Disconnect and lock out all AC line power sources and network communication links prior to mounting or servicing the terminal.
2. Cut the panel enclosure opening strictly according to the PanelView 900 cutout dimensions and clean all metal shavings and rough edges.
3. Verify that the sealing gasket is correctly seated along the rear bezel rim to guarantee NEMA 4X or IP enclosure sealing integrity upon mounting.
4. Insert the unit into the panel cutout and secure it using the peripheral mounting clamps, applying uniform torque sequentially across all screws.
5. Terminate line, neutral, and safety ground wiring to the AC terminal block, ensuring the protective earth lead is connected directly to the panel earth grounding point.