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B&R X20DC4395

I/O module, 2 SSI absolute encoders 24 V

MPN: X20DC4395
Category: Counter functions

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What is the B&R X20DC4395?

24 VDC encoder inputs

SSI, ABR, AB or event counters for inputs

Pulse width modulation for outputs

24 VDC and GND for encoder supply

This module is a multifunctional counter module. It can be connected to two SSI encoders, two ABR encoders, four AB encoders or eight event counters. Four outputs are available for pulse width modulation. The functions can also be mixed.

Specifications

Short description

I/O module

2 SSI absolute encoders 24 V, 2 ABR incremental encoders 24 V, 4 AB incremental encoders 24 V, 8x event counter or 4x pulse width modulation, time measurement, relative timestamp

General information

Diagnostics – Module run/error	Yes, using LED status indicator and software
Diagnostics – Outputs	Yes, using LED status indicator and software (output state)
Power consumption – Bus	0.01 W
Power consumption – Internal I/O	1.5 W
Certifications – CE	Yes
Certifications – UKCA	Yes
Certifications – CRA (Cyber Resilience Act)	In preparation
Certifications – ATEX	Zone 2, II 3G Ex nA nC IIA T5 Gc; IP20, Ta (see X20 user's manual); FTZÚ 09 ATEX 0083X
Certifications – UL	cULus E115267; Industrial control equipment
Certifications – HazLoc	cCSAus 244665; Process control equipment; for hazardous locations; Class I, Division 2, Groups ABCD, T5
Certifications – DNV	Temperature: B (0 to 55°C); Humidity: B (up to 100%); Vibration: B (4 g); EMC: B (bridge and open deck)
Certifications – CCS	Yes
Certifications – LR	ENV1
Certifications – KR	Yes
Certifications – ABS	Yes
Certifications – BV	EC33B ; Temperature: 5 - 55°C; Vibration: 4 g; EMC: Bridge and open deck
Certifications – KC	Yes
Input voltage	24 VDC -15% / +20%
B&R ID code	0x1CC5
Status indicators	I/O function per channel, operating state, module status
Additional power dissipation caused by actuators (resistive) [W]	-
Type of signal lines	Shielded lines must be used for all signal lines.

Incremental encoders

Quantity	4
Encoder inputs	24 V, asymmetrical
Counter size	16/32-bit
Input frequency	Max. 100 kHz
Evaluation	4x
Encoder power supply	Module-internal, max. 600 mA
Overload characteristics of encoder power supply	Short-circuit proof, overload-proof

SSI absolute encoder

Quantity	2
Encoder inputs	24 V, asymmetrical
Counter size	32-bit
Max. transfer rate	125 kbit/s
Encoder power supply	Module-internal, max. 600 mA
Coding	Gray/Binary
CLK: Output current	Max. 100 mA
Overload characteristics of encoder power supply	Short-circuit proof, overload-proof

Event counters

Input filter – Hardware	≤2 µs
Input filter – Software	-
Switching threshold – Low	<5 VDC
Switching threshold – High	>15 VDC
Quantity	8
Nominal voltage	24 VDC
Signal form	Square wave pulse
Evaluation	Each edge, cyclic counter
Input frequency	Max. 100 kHz
Input current at 24 VDC	Approx. 1.3 mA
Input resistance	18.4 kΩ
Insulation voltage between channel and bus	500 V eff
Counter frequency	200 kHz
Counter size	16/32-bit

Edge detection / Time measurement

Counter frequency – Internal	8 MHz, 4 MHz, 2 MHz, 1 MHz, 500 kHz, 250 kHz, 125 kHz, 62.5 kHz
Possible measurements	Gate time, period duration, edge offset for various channels
Measurements per module	Up to 9
Measurements per channel	Up to 2
Signal form	Square wave pulse
Counter size	16-bit
Measurement type	Continuous or triggered

Digital outputs

Pulse width modulation – Period duration	41.6 µs to 1.36 s (note: Dead time when switching between push and pull: Max. 1.5 µs.)
Pulse width modulation – Factor for period duration	n/48000 s, n = 2 to 65535 (note: Dead time when switching between push and pull: Max. 1.5 µs.)
Pulse width modulation – Pulse duration	0 to 100% (note: Dead time when switching between push and pull: Max. 1.5 µs.)
Pulse width modulation – Resolution for pulse duration	0.1% (note: Dead time when switching between push and pull: Max. 1.5 µs.)
Switching delay – 0 → 1	<2 µs
Switching delay – 1 → 0	<2 µs
Switching frequency – Resistive load	Max. 24 kHz
Switching frequency – Inductive load	See section "Switching inductive loads".
Quantity	4
Variant	Push / Pull / Push-Pull
Nominal voltage	24 VDC
Switching voltage	24 VDC -15% / +20%
Nominal output current	0.1 A
Total nominal current	0.4 A
Output circuit	Sink or source
Output protection	Thermal shutdown in the event of overcurrent or short circuit, integrated protection for switching inductive loads
Actuator power supply	Module-internal, max. 600 mA
Diagnostic status	Output monitoring
Leakage current when the output is switched off	Max. 25 µA
Residual voltage	<0.9 V at 0.1 A nominal current
Peak short-circuit current	<10 A
Switch-on in the event of overload shutdown or short-circuit shutdown	Approx. 10 ms (depends on the module temperature)
Braking voltage when switching off inductive loads	Switching voltage + 0.6 VDC
Insulation voltage between channel and bus	500 V eff

Electrical properties

Electrical isolation

Bus isolated from encoder and output ; Output not isolated from output and encoder ; Encoder not isolated from encoder

Operating conditions

Mounting orientation – Horizontal	Yes
Mounting orientation – Vertical	Yes
Installation elevation above sea level – 0 to 2000 m	No limitation
Installation elevation above sea level – >2000 m	Reduction of ambient temperature by 0.5°C per 100 m
Degree of protection per EN 60529	IP20

Ambient conditions

Temperature – Horizontal mounting orientation	-25 to 60°C
Temperature – Vertical mounting orientation	-25 to 50°C
Temperature – Derating	-
Temperature – Storage	-40 to 85°C
Temperature – Transport	-40 to 85°C
Relative humidity – Operation	5 to 95%, non-condensing
Relative humidity – Storage	5 to 95%, non-condensing
Relative humidity – Transport	5 to 95%, non-condensing

Mechanical properties

Note	Order 1x terminal block X20TB12 separately.; Order 1x bus module X20BM11 separately.
Pitch	12.5 +0.2 mm

Accessories

Required accessories (order separately)

X20BM15	Bus modules — The bus module is the base for all X20 24 VDC I/O modules; The internal I/O supply is interconnected; Manual node number assignment; Indepe…
X20BM11	Bus modules — Bus module for 24 VDC I/O modules; The internal I/O power supply is connected through. The bus module is the base for all 24 VDC I/O module…
X20TB12	Terminal blocks — Tool-free wiring with push-in technology; Simple wire release using lever; Ability to label each terminal; Plain text labeling also possibl…

Downloads & documentation

Official documents from B&R, downloaded directly from the manufacturer.

Data sheets & manuals

CAD & dimension drawings

Certificates (16)

X20DC4395: frequently asked questions

When can X20DC4395 be shipped?

X20DC4395 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up X20DC4395 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for X20DC4395 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for X20DC4395, subject to availability and destination.