Siemens SIMATIC S7-400 EXM 438-1 I/O Expansion Module (6DD1607-0CA1)

Siemens SIMATIC S7-400 EXM 438-1 I/O Expansion Module (6DD1607-0CA1)

The SIMATIC S7-400 series EXM 438-1 I/O expansion module technical data sheet (Product Data Sheet, model 6DD1607-0CA1) introduces the electrical parameters, interface capabilities, hardware configuration, and physical characteristics of the module, clarifying its positioning as an expansion unit for FM 458 functional modules. It is suitable for the acquisition and output of analog/digital signals in industrial automation control systems, as well as the access of encoder signals.

Core positioning and key features of the product

Functional positioning: Designed specifically for the FM 458 functional module, this I/O expansion module provides multiple types of signal interfaces and can simultaneously process digital, analog, and encoder signals, meeting the signal acquisition and control requirements in complex industrial scenarios.

Key difference: Clearly labeled "NOT SPAREGART COMPATIBLE TO EXM438", which means it is incompatible with the old EXM 438 module and cannot be used as a replacement for it.

Power supply characteristics: Supports two power supply modes (5V DC, 24V DC, 24V DC requires external setting), with a typical current consumption of 1.5A; the encoder power supply output is about 14V (non isolated), with electronic short circuit protection and a rated output current of 100mA.

Hardware configuration and interface parameters

1. Basic hardware information

Slot requirement: Installation requires 1 slot (required slots: 1);

Weight: approximately 1kg;

**Galvanic isolation: Digital input/output and analog input/output are not isolated * * (Galvanic isolation: No). When designing, attention should be paid to the isolation and protection of external circuits.

Digital I/O interface

Specific parameters of interface type

Digital input - Quantity: 16 channels

-Rated voltage: 24V DC

-Signal logic: "0" is -1~+6V or open circuit, "1" is+13~+33V

-Input current: The maximum allowable static current for the "0" state is 0mA, and the typical static current for the "1" state is 3mA

-Input delay ("0" → "1"): maximum 200 μ s

Digital output - Quantity: 8 channels

-Short circuit protection: electronic/thermal protection

-Response threshold: Typical 250mA

-Output voltage: maximum 3V in "0" state, maximum supply voltage -2.5V in "1" state

-Output current: Rated 50mA for "1" state, minimum 100mA at 0~40 ℃; maximum residual current of 20 μ A for "0" state

-Total switch current: 80% when all outputs are 50mA at 50 ℃

-Output delay (resistive load, "0" → "1"): maximum 15 μ s

Analog I/O interface

Specific parameters of interface type

Analog input - quantity: 5 channels (differential inputs)

-Input range: -10V~+10V

-Accuracy: ± 4 LSB at -10V and+10V (1 LSB=4.88mV)

-Input resistance: 470k Ω

-Resolution: 12 bits (including symbol bits)

-Conversion time (per channel): 45 μ s

Analog output - quantity: 8 channels (4 channels with 16 bits, 4 channels with 12 bits)

-Output range: -10V~+10V

-Short circuit protection: The relative frame has short circuit protection

-Short circuit current: 16 bit output maximum 27mA, 12 bit output maximum 100mA

-Linear error: ± 1 LSB (relative output range)

-Resolution: 4-channel 16 bit (including sign bit), 4-channel 12 bit (including sign bit)

-Conversion time (per channel): 16 bit output 2 μ s, 12 bit output 4 μ s

Encoder interface (Encoder)

Supports multiple types of encoder connections, with a maximum capacity of 12 encoders, to meet the requirements of position and velocity detection.

Specific parameters of encoder type

The total number of connections is 12 (8 incremental encoders, supporting synchronization; 4 absolute encoders)

Incremental Encoder (Symmetric) - Trajectory Signal: Phase A, B (90 ° phase difference, optional zero pulse N), or independent forward/reverse trajectory

-Input signal: "0" is -5~0V, "1" is+3~+5V; differential voltage range is -5~+5V; maximum input current is 15mA (there is no limit on the module side, please pay attention to the external circuit)

Incremental Encoder (Asymmetric) - Trajectory Signal: Phase A, B (90 ° phase difference, optional zero pulse N)

-Input voltage: "0" is -30~+4V (15mA load), "1" is+8~30V (15mA load); Differential voltage range -30~+30V

Absolute Encoder (SSI) - Input signal: 5V (compliant with RS 422 standard)

-Data encoding: binary code, Gray code, Gray Excel Code

-Maximum clock frequency: 2MHz (100kHz~2MHz, depending on cable length)

-Supporting interfaces: SSI (Synchronous Serial Interface) or EnDat interface, both single loop and multi loop encoders are available