90

CAT-POS-E-2001

ASM

WS Position Sensors

Output Specification TSSI-P

· 8192 counts per revolution (13 bit), 4096 revolutions (12 bit)

· Encoder programming and data transfer via RS-232 interface

· In addition sinusoidal incremental signals

The sensing device of the SSI is a 25-bit absolute multiturn encoder. The position

information is given by an analog/digital converter as a serial data word. The processing unit

(PLC, Microcomputer) sends pulse sequences which clocks the data transmission at the

required transfer rate. With the first falling edge of the pulse sequence the position of the

sensor is recorded and stored. The following rising edges control the bit-by-bit transmission

of the data word. After a delay time the next new position information will be transmitted.

Description

Signal Conditioner

TSSI

Absolute Encoder

synchronous serial,

programmable

Output

EIA RS-422, RS-485, short-circuit proof

Excitation Voltage

10 ... 30 V DC, reverse polarity protected

Excitation Current

250 mA max. without load

Clock Frequency

100 kHz ... 1 MHz

Programmable Functions

Resolution, Offset, Preset, Counting Direction, Output

Code and Format

Code

Gray or Binary

Format

Tannenbaum (SSI) or Serial, right aligned

Delay between Pulse Trains

12 to 35 µs

Incremental Signal

Two sinusoidal quadrature signals A and B, each with

512 periods per revolution. Signal amplitude approx.

W terminating resistance

Serial Interface

RS-232C asynchronous (TxD, RxD, GND) for

encoder programming and data transmission

Hardware Programming

Preset1, Preset2, Counting Direction

Stability (Temperature)

002% / K Full Scale (sensor mechanism)

Operation Temperature

-20 ... +85 °C

Immunity to Interference (EMC)

According to EN50082-2, EN50081-1

Data Format

(Train of 26 pulses)

Signal Wiring /

Connection

Signal Name

Connector Pin

Excitation +

7

Excitation GND (0V)

10

CLOCK

8

CLOCK

9

DATA

14

DATA

17

Signal A

15

Signal A

16

Signal B

12

Signal B

13

Internal shield

11

RxD

1

TxD

4

Fault detection signal UaS

3

Preset1

5

Preset2

6

Counting direction

2

Programming Software

and Connector Cable

see page 104.