CONTREX ML-TRIM - Manual (Page 27)

2 - 13
OUTPUTS
NOTE: The installation of this motor control must conform to area and local electrical
codes. See The National Electrical Code (NEC,) Article 430 published by the
National Fire Protection Association, or The Canadian Electrical Code (CEC).
Use local codes as applicable.
Speed Command Out
(J2 pins 1, 2)
Speed Command Out is an isolated
analog output signal that is sent to
the motor drive to control the speed
of the motor. Wire the Speed
Command Out into the Speed Signal
Input of the drive. If the motor drive
has a potentiometer speed control,
remove the potentiometer
connections and wire the Speed
Command Output to the
potentiometer wiper input. The
ML–Trim's isolated common should
always be connected to the drive
common.
Figure 2-14 Speed Command Out
Do not connect the Drive Isolated Common to other
Logic Commons
*
Drive Enable (J5 pin 16)
The Drive Enable output is activated (driven low) when the ML–Trim is signaling a
nonzero speed command to the motor drive, as defined by Drive Enable Logic (CP-74)
The Drive Enable output is driven high (relay deactivated) after Power Up and during
R–Stop and F–Stop. See Figure 2-15. Refer to
Operations: Logic Control, Logic
Output, page 3-37 for details.
NOTE: This is an open-collector relay driver. For specification details, see References:
Appendix A - ML–Trim Specifications, page A-1. Use an external DC power
supply to power the relays. Free-wheeling diodes are incorporated internally in
the ML–Trim and do not need to be added externally.
MOTOR DRIVE
1
2
J2
SIGNAL INPUT
Speed Command Out
Isolated Common
DRIVE COMMON
*