Allen-Bradley 1734-APB Point I/O series PROFIBUS communication adapter

Allen-Bradley 1734-APB is a PROFIBUS communication adapter module in the Point I/O series. The following is a detailed introduction:

Functional Overview: As a PROFIBUS slave device, it manages I/O data transmission from the Point bus to the PROFIBUS network, and communicates with the local Point I/O module at the same time, acting as a PROFIBUS master.

Technical Specifications

Interface and Rate: It has 1 PROFIBUS interface and supports a data transmission speed of up to 12 Mbps.

Topology: It supports daisy chain topology, up to 63 Point I/O modules can be connected, and the maximum number of I/O points is 504.

Power Supply Parameters: Input voltage is 24V DC, field side power supply is 400mA, inrush current is 6A, power consumption is 8.1W at 28.8V DC, power dissipation is 2.8W at 28.8V, and point bus current is 1000mA.

Status indication: Equipped with 3 red/green status indicators, indicating the adapter status, PROFIBUS status and point bus status respectively; 2 green power status indicators, indicating the system power supply (point bus 5V power supply) and field power supply (24V from field power supply).

Other features

Installation method: Usually DIN rail installation is adopted.

Node address setting: Set by two-position thumbwheel switch, the effective setting range is 01-99.

Hot swap support: Point I/O modules support live plugging and unplugging, and inserting and removing modules will not interfere with the communication of other modules with 1734-APB and data transmission to PROFIBUS master devices, but the replaced module must have the same catalog number as the removed module. If multiple modules are removed, the modules must be inserted back to their corresponding positions.

Network termination: If the communication adapter is the last node in the network, the terminal resistor on the PROFIBUS connector must be turned on to terminate the PROFIBUS network, otherwise communication may be unstable or unable to establish communication.