Siemens 6ES7350-1AH03-0AE0 FM350-1 Counter Module

6ES7350-1AH03-0AE0 Siemens FM 350-1 Counter Module with Isochronous Mode

Product Introduction

The 6ES7350-1AH03-0AE0 serves as a high-performance counter module for the SIMATIC S7-300 series. This FM 350-1 module provides one counting channel with a maximum frequency of 500 kHz for 5V encoders. You can connect both 5V and 24V incremental encoders directly to this module. Furthermore, it supports isochronous mode for synchronized processing. The module also includes measuring range types and comes with a configuration package on CD. This model replaces the discontinued 6ES7350-1AH02-0AE0.

Technical Specifications of 6ES7350-1AH03-0AE0

Power Supply Data

• Auxiliary voltage 1L+ (load voltage 2L+): 24V DC

• Permissible range lower limit: 20.4 V (dynamic: 18.5 V)

• Permissible range upper limit: 28.8 V (dynamic: 30.2 V)

• Input current from load voltage 1L+: max. 40 mA

• Input current from backplane bus 5V DC: max. 160 mA

Encoder Supply Outputs

• 5V encoder supply: 5.2V ±2% with max. output current 300 mA

• 24V encoder supply: 1L+ (-3V) with max. output current 400 mA

Power Loss

• Typical power loss: 4.5 W

Inputs and Outputs

Inputs (3 channels)

• Functions: gate start, gate stop, counter setting

• Signal "0" voltage range: -28.8V to +5V

• Signal "1" voltage range: +11V to +28.8V

• Typical input current for signal "1": 9 mA

Outputs (2 channels)

• Short-circuit protection: Yes (clocked electronically)

• Inductive shutdown voltage limitation: 2L+ (-39V)

• Signal "0" max voltage: 3V

• Signal "1" min voltage: 2L+ (-1.5V)

• Rated output current for signal "1": 0.5 A

• Permissible range (0-60°C): 5 mA to 0.6 A

• Output delay ("0" to "1"): max. 300 µs

Encoder and Counter Specifications

Connectable Encoder Types

• Incremental encoder (symmetrical): Yes (2 pulse trains offset by 90°)

• Incremental encoder (asymmetrical): Yes

• 24V initiator: Yes

• 24V directional element: Yes (1 pulse train, 1 direction level)

Counter Data

• Number of counter inputs: 1

• Counter width: 32 bit or ±31 bit

5V Counter Input

• Type: RS 422

• Terminating resistor: 220 Ω

• Differential input voltage: 1.3V

• Maximum counting frequency: 500 kHz

24V Counter Input

• Signal "0" voltage: -28.8V to +5V

• Signal "1" voltage: +11V to +28.8V

• Typical input current for signal "1": 9 mA

• Maximum counting frequency: 200 kHz

• Minimum pulse width: 2.5 µs

Isolation and Connection

Potential Separation

• Digital inputs to backplane bus: Yes (optocoupler)

• Digital outputs to backplane bus: Yes (optocoupler)

• Counter channels to backplane bus: Yes (optocoupler)

• Isolation tested with: 500V

Connection Method

• Required front connector: 1 x 20-pin

Mechanical Dimensions

Physical Specifications

• Width: 40 mm

• Height: 125 mm

• Depth: 120 mm

• Weight: approx. 250 g

Installation Guide for 6ES7350-1AH03-0AE0

First, insert the 6ES7350-1AH03-0AE0 into a free slot on your S7-300 rack. Then connect the 24V auxiliary supply to terminals 1L+ and 2L+. Meanwhile, attach your incremental encoder to the front connector. Use the built-in encoder supply (5V or 24V) to power your encoder directly. Next, connect the three digital inputs for gate start, gate stop, and counter setting functions. Finally, configure the counter and isochronous mode using the software on the included CD.

Packaging List for 6ES7350-1AH03-0AE0

• 1 x SIMATIC FM 350-1 counter module (6ES7350-1AH03-0AE0)

• 1 x Configuration package on CD

• No certificates or warranty documents included

Shipping Method: FedEx, UPS, DHL

Frequently Asked Questions (FAQ)

1. What is the maximum counting frequency for the 6ES7350-1AH03-0AE0?
The 6ES7350-1AH03-0AE0 supports 500 kHz with 5V RS422 encoders. For 24V encoders, the maximum frequency is 200 kHz.

2. Does this module provide power for connected encoders?
Yes, it does. The 6ES7350-1AH03-0AE0 supplies 5.2V at 300 mA for 5V encoders. It also provides 24V at 400 mA from the 1L+ supply.

3. What is isochronous mode and why is it useful?
Isochronous mode synchronizes the counter module with the S7-300 CPU cycle. This ensures consistent and repeatable timing for high-precision applications like positioning.

4. What types of encoders can I connect to this FM 350-1?
You can connect symmetrical incremental encoders (RS422), asymmetrical incremental encoders, 24V initiators, and 24V directional elements. The 6ES7350-1AH03-0AE0 supports all these types.

5. What is the difference between this module and the discontinued 6ES7350-1AH02-0AE0?
The 6ES7350-1AH03-0AE0 adds isochronous mode and measuring range types. Both modules offer 500 kHz counting and support for 5V/24V encoders. This newer model remains in active production with full Siemens support.