Siemens SIMADYN D 6DD1606-3AC0 IT41 Expansion Module

Overview

SIMADYN D • IT41 EXPANSION

Siemens 6DD1606-3AC0 IT41 Expansion Module

Mixed analog, binary and incremental-encoder interfaces for SIMADYN D PM5 and PM6 CPUs.

At a Glance

Brand	Siemens
Model	6DD1606-3AC0
Product Type	IT41 expansion module
Core Function	Mixed analog, binary and incremental-encoder I/O
Compatible Series	SIMADYN D PM5 and PM6 CPU modules

Signal mix

Analog and binary I/O plus four encoder connections.

Encoder setup

Coding plugs select 5 V or 15 V encoder signals.

Module connection

X6 and X7 route field signals through interface modules.

Product Overview

6DD1606-3AC0 is the Siemens SIMADYN D IT41 expansion module for PM5 and PM6 CPUs. It adds analog inputs and outputs, binary inputs and outputs, and incremental-encoder connections to the CPU assembly.

The board provides four encoder channels with monitoring tracks, one alarm input per encoder, and one alarm-reset output per encoder. A maximum of two ITxx expansion modules can be mounted on one CPU module.

Ordering focus: Match the existing CPU, ITxx stack, encoder signal voltage and X6/X7 interface-module connections before selecting the replacement board.

Key Functions

Analog and binary signal expansion

Four analog inputs, four analog outputs, sixteen binary inputs and sixteen binary outputs extend the PM5 or PM6 CPU I/O.

Four incremental-encoder channels

Each channel can process quadrature A/B tracks with an optional zero pulse or separate forward and reverse pulses.

Selectable encoder interface voltage

Two coding plugs select the receive-driver arrangement for 5 V or 15 V encoders; the factory position is 15 V.

Official Specifications

Mounting slots occupied	1
Dimensions (W × H × D)	20.14 × 233.4 × 220 mm
Approximate weight	0.6 kg
5 V supply	4.75–5.25 V; typical current 420 mA
15 V supply	14.4–15.6 V; typical current 450 mA plus encoder load
Encoder supply load limit	100 mA maximum; electronically limited
Negative 15 V supply	−15.6 to −14.4 V; typical current 175 mA
External 24 V supply	20–30 V; typical current 100 mA plus binary-output currents
Analog input channels	4 differential, non-isolated inputs
Analog input range	−10 V ±4 LSB to +10 V ±4 LSB
Analog input resistance	470 kΩ
Analog input filter	1.5 kHz at the −3 dB point
Analog input resolution	12 bits
Maximum analog input conversion time	45 µs
Analog output channels	4 non-isolated outputs with associated ground terminals
Analog output range and current	−10 to +10 V; ±10 mA
Analog output resolution	16 bits
Binary input channels and rating	16 non-isolated inputs; 24 V DC nominal
Binary output channels and current	16 non-isolated outputs; 50 mA nominal per active output
Encoder track frequency	1 MHz maximum

Official source:Siemens SIMADYN D Hardware Manual, IT41 section 5.3 and technical data 5.3.6.

Frequently Asked Questions

Which CPU modules can I pair with 6DD1606-3AC0?

The expansion module mounts on a SIMADYN D PM5 or PM6 CPU, with a maximum of two ITxx modules per CPU.

Can 6DD1606-3AC0 read incremental encoders with a zero pulse?

Yes, the module accepts A and B tracks displaced by 90 degrees and an optional zero pulse.

How do I select a 5 V encoder on 6DD1606-3AC0?

Position both coding plugs for 5 V operation before connecting the encoder, because the factory setting selects 15 V.

What is the maximum encoder track frequency for 6DD1606-3AC0?

The module accepts an encoder track frequency up to 1 MHz.

Which cable can connect the X6 signals of 6DD1606-3AC0?

An SC49 plug-in cable connects X6 to two SU10 interface modules for the encoder and analog-output signals.

Can I route the X7 signals of 6DD1606-3AC0 through several interface modules?

Yes, an SC54 cable can connect X7 to as many as five compatible interface modules.

What mounting step supports noise-immune operation of 6DD1606-3AC0?

Bolt the module assembly firmly into the subrack using the specified distance pieces.

Compatibility & Ordering Notes

Before ordering 6DD1606-3AC0: Match the PM5 or PM6 CPU, the ITxx stack, the encoder voltage and the X6/X7 field wiring to the installed SIMADYN D assembly.

Compatibility Checklist for 6DD1606-3AC0

• Mount no more than two ITxx expansion modules on one PM5 or PM6 CPU; each ITxx occupies one additional slot.
• Check both encoder coding plugs before connecting a 5 V encoder; the factory position is for 15 V.
• Use SC49 with SU10 interface modules for X6; select SC49 or SC54 and compatible interface modules for X7 according to the required signal routing.
• Fasten the module assembly with the specified distance pieces and bolt it securely into the subrack for noise-immune operation.

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