MTS Systems MAXPLUS 211, Manual

Page: 11 / 36

11
I/O Wiring and Descriptions
The amplifier has three inputs and two outputs. These inputs and outputs are designed to
interface to a 24 volt logic system. The amplifier is shipped so that the operation of the inputs
is as follows.
With no wires connected to ENB, SPD, or SHFT, the amplifier is not enabled and normal
operation will not occur. The inputs are activated by connecting them with a switch closure to
any of the provided GND terminals.
AUX
SIG
RESP
CUR
BAL
RESET
ENCODER
I/O
GND
ORIENT
RAMPS
GND
-COM
+COM
CUR
TAC
GND
FLT
SHFT
SLOW
SPD
ENB
I/O WIRING
EXAMPLE
The actual decision as to open or closed switches occurs at a voltage level between 5-8 volts
DC. Less than 5 volts is active; greater than 8 volts is inactive.
The Enable (ENB) Input must be ON (grounded) to allow the amplifier to be enabled.
The Shift (SHFT) and Speed (SPD) Inputs are used in conjunction with switches or relays that
are connected to the motor windings to select the three available speed-torque ranges of the
motor:
Amplifier Inputs
SHFT SPD
LOW 1 1200 rpm GND GND
2 2400 rpm GND OPEN
HI 3 4200 rpm OPEN OPEN
A 10 volt command signal will produce the above speeds.