Encoder; Allowed Encoder Cable Length - Danfoss VLT Safety Option MCB 150 Installation Manual

Installation Guide | VLT® Safety Option MCB 150/151
Table 9: Connector Pin Assignment, VLT® Safety Option MCB 151
Y31
1 2 3 4 5
MCB 151
Safe Option
SW. ver. xx. xx
HTL Enc.interface
1 2 3 4
Y31/
Illustration 24: Nameplate MCB 151

4.2 Encoder

4.2.1 Allowed Encoder Cable Length

The allowed cable length depends on the selected encoder. The longest cable can be achieved when using bipolar TTL encoders.
Unipolar HTL encoders only allow a shorter length. In this case, the encoder power supply voltage plays a decisive role. The maximum
cable length for HTL encoders used as unipolar encoder (in this case only 1 signal is evaluated) is 100 m (328 ft).
The maximum cable length for TTL encoders used as bipolar encoder (in this case both signals A/nA or B/nB) is 150 m (492 ft).
The minimum cross-section of the power supply conductor is 0.75 mm
44 | Danfoss A/S © 2018.09
6 7 8 9 10 11
Option B
130B3290
1 2 3 4
LED:
5 6 7 8 9 10 11 12
Pin
1
12
2
3
4
5
6
7
8
9
10
11
12
2
(18 AWG).
Name Description
DI1 A Digital input 1 A channel
GND Digital GND
DI1 B Digital input 1 B channel
ENC A Encoder channel A
DI2 A Digital input 2 A channel
GND Digital GND
ENC B Encoder channel B
DI2 B Digital Input 2 B channel
GND Digital GND
24 V Power output
GND Supply GND
S37 STO enable
AQ279747441421en-000101 / 130R0292
Installation