RO1376 - Rotary encoder IFM - Free user manual and instructions

Product type	Incremental rotary encoder
Brand	IFM
Model	RO1376
Power supply	5 V TTL or 10...30 V HTL depending on version
Outputs	A, B, index 0 with inverted signals for differential
Short-circuit protection	Yes (TTL on 0 V; HTL on 0 V and L+ max 1 min)
Max cable length	100 m (5 V TTL) / 300 m (10...30 V HTL)
Connection	Male 12-pin connector or 13-wire cable
Mounting	Shaft 10 mm min, clamping nut, 4 M3 screws
Shielding	Braid connected to housing
Minimum distance from interference sources	20 cm
Protection rating	Not specified
Dimensions	Not specified
Weight	Not specified
Maintenance	Avoid shocks and tools on the shaft
Safety	Disconnect power before connection; isolate unused wires
Additional information	Manual and accessories at www.ifm.com

Frequently Asked Questions - RO1376 IFM

How to connect the RO1376 encoder?

Turn off the installation. Connect according to the diagram on the cover or in the manual: L+ wires, 0V, outputs A, B, index 0 and their inverted signals. Isolate unused wires.

What is the difference between the 5 V TTL and 10...30 V HTL versions?

The 5 V TTL version operates at 5 V and has TTL-compatible outputs. The 10...30 V HTL version accepts a supply voltage of 10 to 30 V and provides HTL outputs (higher logic level). The maximum cable lengths differ: 100 m for TTL, 300 m for HTL.

How to mount the encoder on the shaft?

Place the clamping nut on the encoder, insert the shaft at least 10 mm, secure the stator coupling with four M3 screws, then tighten the nut. Avoid shocks to the shaft.

What signals does the RO1376 provide?

It delivers digital signals A and B phase-shifted by 90° to detect the direction of rotation, as well as an index 0 once per revolution serving as a reference. Each signal is accompanied by its inverted version for differential transmission.

Is the encoder protected against short circuits?

Yes, the TTL version protects the outputs against a short circuit to 0 V. The HTL version protects against a short circuit to 0 V and L+ (for a maximum of 1 minute).

What is the maximum cable length?

For the 5 V TTL version, max 100 m. For the 10...30 V HTL version, max 300 m. Use suitable cables and keep them away from interference sources (minimum 20 cm).

How to test the encoder without installing it?

You can use the sensor L+ and sensor 0 V wires as test wires, as they are connected to the supply voltage. Otherwise, isolate them or connect them to the power supply.

How to determine the direction of rotation?

The 90° phase shift between outputs A and B allows an electronic module to detect the direction: if A leads B, the rotation is in one direction; if B leads, it is the opposite direction.

What to do if the encoder stops responding?

Check the power supply, connections, and short-circuit protection. Ensure the cables are not damaged and comply with the minimum distance from interference sources. Consult the manual or the ifm.com website.

Where to find the technical data sheet and accessories?

On the website www.ifm.com, you will find the technical data sheet, mounting accessories (measuring wheel, pinion, etc.) and other documents.

USER MANUAL RO1376 IFM

Function and features

The encoder transforms rotational movement into pulse sequences. These allow the measurement of linear distances and angular movement as well as the determination of positions.

Electrical connection

Disconnect power from the installation before connecting or disconnecting cables or connectors!

Unused wires must be insulated to avoid short circuits and cross faults.

Short-circuit protection

5 V TTL version: outputs short-circuit protected against 0 V

10...30 V HTL version: outputs short-circuit protected against 0 V and L+ for maximum 1 minute

Standard wiring:

	Flange plug 13-wire cable 12-pole
L+ M brown/green
L+ sensor B blue
0V K white/green
0V sensor L white
A E brown
A neg. F	green
B	H	grey
B neg. A	pink
0 index	C	red
0 index neg.	D	black
fault neg.	G lilac
free	-	-
free	-	yellow
screen	housing	housing

Wiring is also indicated on the housing cap. If there is a deviation, the encoder must be connected as indicated on the label on the housing cap.

The wires L + (sensor) and 0V (sensor) are internally connected to the supply voltage. When using external electronics which regulate the supply voltage these wires can be used as test wires. If unused, these wires must be connected to the supply voltage or insulated.

Depending on the version, the electrical connection is made via the cable or via cables to be obtained separately.

When using suitable cables the maximum cable length is 100m for the 5 V TTL version and 300m for the 10...30 V HTL version.

The cables must be laid separately from interfering sources, the minimum distance is 20~cm .

The braided screen in the cable is connected to the encoder housing.

Output signals

The encoder provides digital pulse sequences at the output stages. The outputs A and B are electrically offset by 90^ . Thus the direction of rotation can be evaluated in the external electronics.

The combined zero index is provided once in a mechanical revolution of the shaft. In case of power failure it can be used as a reference point within a revolution.

The inverted output signals are used for external electronics with differential voltage input to filter interference.

Installation

Do not hit the shaft, do not use a file or similar tool on the shaft: This could destroy the unit!

1. Place the clamping nut on the encoder.
2. Slip the encoder onto the shaft (min. 10mm ) and fix the stator coupling by means of four M3 screws.
3. Tighten the screws of the clamping nut.

1. Place the clamping nut on the encoder.
2. Slip the encoder onto the shaft (min. 10mm ) and fix the stator coupling by means of four M3 screws.
3. Tighten the screws of the clamping nut.

Linear movements can be transformed into a rotational movement using a measuring wheel or rack and pinion. For mounting the maximum permissible shaft loads of the encoder must be taken into account.

The data sheet, further documents and suitable accessories are available on our website at www.ifm.com.

Holder of Certificate: ifm electronic gmbh

Friedrichstr. 1

45128 Essen

GERMANY

Production

20196

Facility(ies):

Certification Mark:

Product:

Electronic measuring equipment (encoders)

Model(s):

RAX, ROx, RPx, RBx, RCx, RUX, RVx, RSx, RMs, RNx "x" can be any character (up to 15 digits) and defines configurations, interface, resolution and length.

Parameters:

Rated Voltage: 5-30 Vdc

Rated Current: max. 370 mA

Remark:

When installing, requirements of mentioned Test

Standards and Installation Guide has to be fulfilled.

Supply shall fulfil requirements of limited energy

circuit or Class 2 power.

Tested

UL 61010-1:2004

according to:

CAN/CSA-C22.2 No.61010-1:2004

The product was voluntarily tested according to the relevant safety requirements and mentioned properties. It can be marked with the certification mark shown above. The certification mark must not be altered in any way. This product certification system operated by TÜV SÜD America Inc. most closely resembles that described by ISO/IEC Guide 67, Conformity assessment - Fundamentals of product certification, System 3. See also notes overleaf.

Test report no.:

028-71370093-000

Date, 2010-08-18

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