Etel DSC2P Hardware Manual

24 DSC2P Hardware Manual
ETEL Doc. - Hardware Manual # DSC2P / Ver H / 6/1/11
3.1.1.2 Absolute analog encoder (EnDat 2.1)
The EnDat 2.1 is an absolute encoder. It has 1 Vptp signals with a load resistor R
0
=120Ω. Its signals are similar
to the incremental encoders (without the index), but it additionally includes a RS485 serial link (EIA standard,
EnDat 2.1 interface) for the absolute position measure: EDT (serial data) and ECL (clock). The ECL (clock)
signal is received from the DSC2P. From its first falling edge (latch signal), the absolute position will be
defined within one incremental signal period (depends on the encoder type).
The +5VDC encoder supply output is protected by the fuse F3 (1A) on JC5, JC6 and JC10.
Remark: The cable used with an absolute analog encoder (EnDat 2.1) must have power wires with a
minimum diameter to guarantee a sufficient voltage at the terminals of the encoder (refer to the
data sheet of the encoder for more information).
D-SUB, 15 pins, female
ABSOLUTE
ENCODER
Pin # Signal Function Interface
1EDT +
EnDat serial data I/O + / RS485
2ECL +
EnDat clock output + / RS485
3ECL -
EnDat clock output - / RS485
4+5VDC
Encoder supply output (protected by fuse F3 of 1A)
5GND
Encoder supply output (0V)
6COS -
Cosine - signal input
7 SIN -
Sine - signal input
8 Reserved
Do not connect
9EDT -
EnDat serial data I/O - / RS485
10 Reserved
Do not connect
11 Reserved
Do not connect
12 GND
Encoder supply output (0V)
13 COS +
Cosine + signal input
14 SIN +
Sine + signal input
15 Reserved
Do not connect
ANALOG ENCODER
JC5
1
8
15
9
COS +
SIN +
COS -
SIN -
R
R
R
C
C
DSC2P
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Etel DSC2P Specifications

General

Brand	Etel
Model	DSC2P
Category	Controller
Language	English