Allen-Bradley 1747-L532 SLC 5/03 Processor Module

Technical Specifications

The 1747-L532 operates with well-defined electrical and performance parameters.

Memory and Processing Capabilities

This SLC 5/03 processor comes with 16KB of battery-backed RAM. The battery, a 1747-BA unit, preserves the program during power outages. Additionally, the controller supports backup memory via the 1747-M13 module, which enables automatic program loading after a power cycle.

The processor executes bit instructions in just 0.44 milliseconds. Its overall system performance is notably faster than many competing controllers. This speed allows for more complex logic routines without sacrificing scan time.

I/O Capacity and Scanning

The 1747-L532 supports a maximum of 4096 discrete input points and 4096 discrete output points. It also handles up to 480 local analog I/O channels. The I/O scan time is 0.225 milliseconds, ensuring rapid updates between the processor and field devices.

For physical expansion, this controller manages up to 3 I/O chassis. Each chassis can hold a maximum of 30 module slots. This configuration offers substantial flexibility for system growth.

Communication Interfaces

This Allen-Bradley 1747-L532 integrates two communication ports. The first is a DH485 port with default settings of 19.2 Kbaud and node address 1. The second is an RS-232 port, configurable as DF1 or DH485 for peer-to-peer applications.

The RS-232 port defaults to DF1 Full-duplex mode with a baud rate of 19.2 Kbaud. Handshaking is disabled by default, and the error check uses CRC. Parity is set to none. You can also use RSLinx auto-configuration to detect this port easily.

Advanced Features and Instruction Set

The 1747-L532 supports a rich set of programming instructions.

Supported Instruction Types

This SLC 5/03 controller executes both basic and advanced instructions. Basic instructions include Bit, Timer, Counter, and Comparison functions. Advanced instructions cover Math operations, Move, Copy, and Bit Shift commands.

Moreover, the processor handles Sequencer, Jump and Subroutine, and Messaging instructions. It also supports STI, FIFO/LIFO, and PID control loops. For complex calculations, the 1747-L532 provides Advanced Math and Trigonometric functions.

Additional Capabilities

Online programming is supported, allowing you to modify logic without stopping the process. The built-in real-time clock and calendar enable time-based control sequences. A key-switch provides hardware protection against unauthorized program changes.

Floating-point math is also available, expanding the processor's ability to handle analog signals with precision. Furthermore, flash memory upgrades let you update the firmware without replacing the hardware.

Environmental and Mechanical Specifications

The 1747-L532 is designed for reliable operation in clean industrial settings.

Temperature and Humidity

The operating temperature range is 0 to 60 degrees Celsius. Storage temperatures are not specified but typically align with SLC 500 standards. The module should be installed in dry environments to prevent moisture-related issues.

Shock and Vibration

This processor withstands operational shocks of 30G. Its robust construction ensures stable performance even in areas with minor mechanical disturbances.

Power Consumption

The Allen-Bradley 1747-L532 draws 500 milliamps at 5 Volts DC from the backplane. It also consumes 175 milliamps at 24 Volts DC. These values are within the typical capacity of SLC 500 power supplies.

Installation Guidelines

Installing the 1747-L532 requires attention to slot placement and system configuration.

First, insert the processor into slot 0 of the SLC 500 chassis. This slot is reserved exclusively for the CPU module. Second, ensure the chassis power is off before installation. Third, connect the programming terminal to the RS-232 port for initial setup.

For communication wiring, use shielded cables to minimize noise interference. The DH485 port supports multi-drop networks with up to 32 nodes. The RS-232 port works best for point-to-point connections with programming software or HMI devices.

After installation, verify the battery status using the LED indicator on the module. A lit LED suggests adequate battery power. Replace the 1747-BA battery periodically to prevent program loss.

Packaging List

When you receive the 1747-L532, the package contains the following items:

• One Allen-Bradley 1747-L532 SLC 5/03 Processor Module

• One removable terminal cover

• One quick-reference installation guide

Please note that the package does not include the 1747-BA battery, 1747-M13 backup memory, or communication cables. These items are available separately.

Frequently Asked Questions

1. What is the maximum memory size of the 1747-L532?
The 1747-L532 offers 16KB of battery-backed RAM. This translates to 16,000 words of user memory, with 12,000 words for combined data and program and 4,000 words for pure data storage.

2. Can the 1747-L532 communicate with DeviceNet networks?
Direct DeviceNet communication is not built into this SLC 5/03 processor. However, you can install a DeviceNet scanner module in the I/O chassis to enable DeviceNet connectivity.

3. How do I configure the RS-232 port on the 1747-L532?
The RS-232 port defaults to DF1 Full-duplex at 19.2 Kbaud. You can change these settings using the programming software. Alternatively, use RSLinx auto-configuration for automatic detection.

4. What happens if the battery on the 1747-L532 drains completely?
If the 1747-BA battery drains, the processor may lose its stored program. Installing a 1747-M13 backup memory module prevents this issue by automatically reloading the program upon power-up.

5. Which shipping carriers do you use for this controller?
We ship all orders via FedEx, UPS, or DHL. Tracking numbers are provided within 24 hours of dispatch.