Electro-Craft MAX-430 - Velocity Clamp and Current Limit

2-12 Installation
P/N 0013-1025-001 Rev F
Velocity Clamp (Torque Mode)
Function
A jumper connected between P2 pins 1 and 2 will reduce the gain of the velocity drive to
approximately 3.0 A/volt. The drive will then function as a torque (current) drive. See Figure 2.7
on page 2-9.
Connection
P2 pins 1 and 2
External Current Limit (Optional)
Function
This input may be used to set the current limit externally. The following table indicates approx-
imate reductions of peak current when the ILIM potentiometer is fully clockwise (the exact
degree of reduction is a function of the internal current limit). See Figure 2.7 on page 2-9.
Connection
P2 pins 5 and 6
Intro
F
IGURE
2.11
Sinking Opto’s with External Power (P8A: pins 2-3 and P8: pins 2-3)
Resistance Reduction of Peak Current
330
Ω
approximatel
y
25% of peak current
1.2 k
Ω
approximatel
y
50% of peak current
3.3 k
Ω
approximatel
y
75% of peak current
Active High:
To enable the drive, or to release the forward or
reverse amplifier clamps, hold input at common.
External power must be supplied to P1-7.
Switch Status
Closed OK
Open Clamped
Opto
1.0k
+15V
+ 22-28 VDC
INHIBIT P1-8,
FAC P1-9
or
RAC P1-10
3.3k
COMMON
Supply
P1-7
+ 22-28 VDC