IV.4 Controllable torque limiting, Option -IL-
IV.4.1 General, technical data
With the -IL- option you can limit the torque of the motor which is connected to the digifas™ to a
freely selectable value which is less than the pulse torque, with the aid of a DC control voltage.
This is achieved by changing the current setpoint by means of an external analog speed-control
loop.
The electronics is contained in a separate casing.
Assembly : — on top-hat rails EN 50022-35 or C-rails, in the immediate vicinity
of the servo amplifier
Dimensions : — H x W x D (without top-hat rail) : 111 x 145 x 90 mm
Connections : — two 8-pin Combicon connectors for control signals,
setpoints and auxiliary voltages
— SubD 9-pin socket for pulse encoder signals from digifas™
— SubD 9-pin plug to transfer the pulse encoder signals to
higher-level controls
Inputs : — 2 differential amplifiers for 2 speed-setpoints ±10V = ± final speed
SW1 fixed, SW2 can be decreased by P302, both SW are added
— 1 differential amplifier for current limit 0 ... 10V
— aux. supply voltage +25V DC/ 210 mA, XGND
— enable via optocoupler, DGND
— pulse encoder signals from digifas™ , PGND
Outputs : — current setpoint ±10V, AGND
— aux. voltage +10V DC/ 5mA, AGND
— pulse encoder signal for control via optocouplers, PGND
Potentiometer : — P302 : to reduce setpoint 2 0 ... 100%
— P303 : offset (speed drift) ±10mV
— P304 : fine adjustment of speed ±12%
— P305 : AC gain (P-gain) 3 ... ∞
Solder link LB1: — open : final limit speed 3000 rev/min (standard)
— closed : final limit speed 6000 rev/min
LEDs : — display the logical state of the pulse encoder signals
Fusing : — F1, 630 mAF, to protect the aux. supply voltage
Page IV - 4 Interfaces and options Chapter IV
03.98 digifas
®
7200 series
Only possible for units without a CONNECT module.
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