CHAPTER 2: INSTALLATION
STARTER TYPES
MM200 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
2–21
Figure 2-26: LO and HI inputs
The full-voltage reversing starter type is a full voltage or across-the-line reversing starter.
When a start A (forward) control is received, the pre-contactor relay (if any) is picked up for
the set pre-contactor time. When the pre-contactor timer times out, relay1 picks up and
seals-in, picking up contactor F, which starts the motor in the forward direction. When a
start B (reverse) control is received, relay1 drops out, and contactor F drops out. When the
contactor F Off status is received, the starter waits for the set transfer time to allow the
motor to slow or stop. When the transfer time timer times out, relay2 picks up and seals-in,
picking up contactor R, which starts the motor in the reverse direction. When a stop control
is received, relays 1 and 2 drop out, contactor F and R drop out, and the motor stops. The
starter logic is fully symmetrical between forward and reverse.
When a contact input has its function set to forward limit, and that contact closes, relay1
will drop out, stopping any forward rotation. When a contact input has its function set to
reverse limit, and that contact closes, relay2 will drop out, stopping any reverse rotation.
The pre-contactor is omitted on forced starts (for example, External Start). Forced starts are
not supervised by this starter transfer timer – any external starting circuit must itself
respect fast direction change restrictions.
F
-
+
A1
A2
A4
A3
A5
A6
A8
A9
A10
A7
+
-
24 VDC CONT
ACT
INPUTS
CONTROL
POWER (VDC)
CONTROL
POWER
24 VDC
FIELD STOP
RESET
F
N
L
A1
A2
A4
A3
A5
A6
A8
A9
A10
L
N
V
AC CONT
ACT
INPUTS
CONTROL
POWER (V
AC)
CONTROL
POWER
VAC
FIELD STOP
RESET
NR
LO
HI
888742B2.cdr
RETURN
NOTE: AC power and AC input wiring shown.
R
R
FIELD START REV
FIELD START FOR
FIELD START REV
FIELD START FOR
