Siemens 6ES5400-0AA11 Input Module

Physical Dimensions and Mounting Specifications

The Siemens 6ES5400-0AA11 combines digital inputs with built-in timer functions. This module measures 250mm in height, 25mm in width, and 150mm in depth. You can mount this unit on a standard 35mm DIN rail inside any S5 cabinet. The module weighs 0.39 kilograms , allowing for simple plug-in installation without tools.

Internal Architecture and Component Density

The Siemens 6ES5400-0AA11 contains 132 individual components on its two-layer PCB. Sixteen opto-isolators separate each input channel from the internal logic circuits. Four timer ICs provide independent timing functions for selected input channels. Additionally, twenty current-limiting resistors protect each input from overcurrent conditions.

Energy Storage and Timer Retention

This input module stores 5.8 joules across four electrolytic capacitors. This energy reserve powers timer circuits for up to 20 milliseconds during power dips. The storage also maintains timer configuration while the system recovers from faults. Consequently, the module prevents timer reset during brief supply interruptions.

Parameter	Value	Unit
Dimensions (H x W x D)	250 x 25 x 150	mm
Weight	0.39	kg
PCB layer count	2	layers
Total components	132	pieces
Opto-isolators	16	units
Timer ICs	4	units
Current-limiting resistors	20	units
Electrolytic capacitors	4	units
Total energy storage	5.8	J
Timer hold-up time	20	ms
Digital input channels	16	channels
Timer-equipped channels	4	channels
Input voltage (nominal)	24	V DC
Input voltage range	20–30	V DC
Input current per channel	7	mA
Input impedance	3.4	kΩ
ON voltage threshold	>15	V DC
OFF voltage threshold	<5	V DC
Input response time	3	ms
Timer range (each channel)	0 to 999	seconds
Timer resolution	0.1	seconds
Backplane current draw	130	mA
Isolation voltage	1500	V AC
LED indicators	16	units

Interface and Connectivity Features

The Siemens 6ES5400-0AA11 provides one 20-pin screw terminal block for field wiring. A single 20-pin IDC header links the module to the S5 backplane. You will also find one 2-pin connector for external timing reference. Each terminal accepts AWG 24 to AWG 16 solid or stranded copper wire.

Input Signal Processing

This module filters each input with a 3ms hardware debounce circuit. This filtering eliminates false triggers from mechanical contact bounce effectively. The Siemens 6ES5400-0AA11 accepts signals from pushbuttons, limit switches, proximity sensors, and relay contacts. Each channel includes reverse polarity protection for error-tolerant field wiring.

Timer Functions and Configuration

Four input channels feature built-in timer functions for delay applications. You can configure each timer as ON-delay, OFF-delay, or pulse stretching. The timer range extends from 0 to 999 seconds with 0.1-second resolution. Furthermore, you can adjust timer settings using potentiometers on the front panel.

Diagnostic and Status Indication

Sixteen LED indicators provide immediate visual feedback for all input channels. Green illuminates steadily when the input receives a valid ON signal. The LED turns OFF completely when the input remains in the OFF state. Additionally, a green PWR LED confirms the presence of valid backplane power to the module.

Compatibility and System Integration

This input module works exclusively with Siemens SIMATIC S5 programmable controllers. You can mix this module with digital outputs, analog modules, and specialty units on the same rack. The module supports hot-swap replacement without powering down the entire system. The unit provides electrical isolation between field wiring and the S5 backplane.

Environmental Specifications and Compliance

You can operate this input module from 0°C to 60°C ambient temperature without derating. Storage temperature ranges from -20°C to 70°C for long-term preservation. Non-condensing humidity tolerance spans 10% to 95% for industrial environments. This module meets DIN 19240 and IEC 61131-2 standards for digital input equipment.