Configured for real-time human-machine interaction in industrial control systems, the Allen-Bradley 2707-L40P2 (2707L40P2 Operator Interface Term) provides direct physical and electrical execution of operator commands and system status monitoring.

Model Designator Breakdown

• 2707-L40P2: Standard catalog number for the DTAM Plus unit.

• P2 Power Configuration: Denotes integrated power supply supporting 85-265 VAC (47-440 Hz) or 110-300 VDC input ranges.

Hardware Specifications

PLC Communication and Deterministic Performance

The unit facilitates operator interaction with controller memory through serial protocols. Integration requires precise configuration of communication baud rates and node addressing to ensure deterministic data exchange between the DTAM terminal and the PLC backplane. Firmware compatibility must be verified against the host controller's scanning cycle to prevent communication latency during high-speed data updates or alarm triggering events.

Ordering Information

• DTAM Plus Operator Interface terminal (2707-L40P2).

• Integrated power supply module (pre-installed).

• Unit is shipped as a standalone hardware component; mounting hardware and communication cabling are not included.

Installation and Field Guidelines

• Mounting: Panel mount installation utilizing the provided gasket to maintain the integrity of the enclosure rating.

• Wiring: Ensure RS-232/485 cabling utilizes shielded twisted-pair conductors to mitigate EMI in industrial zones.

• Grounding: Secure a low-impedance path to the control cabinet ground stud to prevent common-mode noise on the serial communication lines.

• Power: Verify input voltage remains within 85-265 VAC or 110-300 VDC limits; utilize external circuit protection as per local electrical codes.

Frequently Asked Questions

• Does the unit support hot-swapping? No, power must be disconnected from the terminal before disconnecting communication cables or removing the unit from the panel.

• Can the memory be expanded beyond 40 K? No, the 40 K memory capacity is fixed and internal to the main processor board architecture.

• What is the function of the RS-232 printer port? It is dedicated to serial output of alarms and operator-triggered reports to a connected serial printer.

• Is the real-time clock battery-backed? Yes, an internal component maintains the RTC during power cycles; replace only when prompted by a low-battery diagnostic indicator.

• How is the baud rate configured? Configuration is performed via the setup menu accessed through the function keys during the power-up initialization sequence.

• Does it support Profinet connectivity? No, this unit is limited to serial RS-232/485 interfaces and does not support Ethernet-based protocols.

• Can the display backlight be replaced? The backlight is integrated into the display module; failure requires replacement of the entire display assembly.

• Why is communication interrupted during motor starts? High inrush currents in nearby variable frequency drives may cause noise on serial lines; check shielding and grounding of the RS-485 cable.