Encoder - gefran SIEIDrive AVy Series Quick Start Up Manual

Temperature-dependent contacts in the motor winding
Temperature-dependent contacts "Klixon" type can disconnect the drive via the external control or can be
reported as an external fault on the frequency inverter (terminal 15). They can also be connected to the
terminals 78 and 79 in order to have a specific error signal. In this case connect the existing 1 Kohm resistor
in series to the wiring, note that one side of it must be connected directly to terminal 79.
N !
The motor PTC interface circuit (or klixon) has to be considered and treated as a signal
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circuit. The connections cables to the motor PTC must be made of twisted pairs with a
shield, the cable route should not be parallel to the motor cable or far away at least 20 cm.
Current limitation of the frequency inverter
The current limitation can protect the motor from impermissible overloads. For this the current limitation
and the motor overload control function of the Drive ("Ovld mot ctrl") must be set so that the current is kept
within the permissible range for the motor concerned.
N !
Remember that the current limitation can control an overheating of the motor only due
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to overload, not due to insufficient ventilation. When the drive is operated at low speeds
the additional use of PTC resistors or temperature-dependent contacts in the motor
windings is recommended, unless separate forced ventilation is available.
Output chokes
When using general purpose standard motors, output chokes are recommended to protect winding isolation
in some cases. See section 5.7.2, " Output chokes".

4.4.2. Encoder

One of two types of encoder may be connected to the XE connector (high density 15-pole socket, fitted on
device), see the table 4.4.2.2 for the jumper settings
- DE: 5V digital incremental encoder with
- SE: 5V sinusoidal incremental encoder with
Encoders are used to feed back a speed signal to the regulator. The encoder should be coupled to the motor
shaft with a backlash free connection.
Optimal regulation results are ensured when using sinusoidal encoders. Digital encoders (rotary encoders)
may also be used. See section 4.3.6, "Accuracy".
The encoder cable can be made of twisted pairs with a global shield, which connect to ground on the Drive
side. Avoid connecting the shield on the motor side. In particular cases where the cable length is more than
100 meters (328 feet), (high electromagnetic noise), it may useful to use a cable with a shield on each
conductor pair, which can be connected to the common point (0V). The global shield must always be grounded.
Some types of sinusoidal encoders may require installation with galvanic isolation from the motor frame
and shaft.
Table 4.4.2.1: Recommended cable section and length for the connection of encoders
Cable section [mm
Max Length m [feet]
A / A, B / B, C / C
A / A, B / B, C / C
2
] 0.22
27 [88] 62 [203]
—————— Installation guidelines ——————
0.5 0.75
93 [305]
1 1.5
125 [410] 150 [492]
avy3130
57 Ch.4