LEESON NEMA 4X SCR Control: 174903.00 (Obsolete) - Manual (Page 8)

TERMINAL STRIP WIRING
The Speedmaster has an 11 position block type terminal strip for ease of connection.
P1-1 (SPEEDPOT LO) Connects to low side (orange wire) of the 5K speedpot (normally the
CCW end). This input is raised and lowered by the MIN. trimpot. Electronic speed input
(voltage follower) may be referenced to speedpot LO if the MIN trimpot adjustments are
to be active. Otherwise, inputs may be referenced to -ARM, which will bypass the MIN
trimpot. NOTE: INPUT MUST NOT BE GROUNDED!!
P1-2 (SPEEDPOT WIPER) Connects to wiper (red wire) of the 5K speedpot (center lead).
For voltage follower applications, this INPUT MUST NOT BE GREATER THAN +12
VOLTS MAXIMUM AND MUST NOT BE GROUNDED!
P1-3 (SPEEDPOT HI) Connects to high side (white wire) of the 5K speedpot (CW end). This
is internal +12 volts. For start-stop applications, the connection between this terminal
and speedpot HI can be opened and closed by a SPST switch. See question #3 in
“COMMONLY ASKED QUESTIONS”. NOTE: INPUT MUST NOT BE GROUNDED!!
P1-4 (-ARM) Connects to minus (-) Armature wire (A2) on motor. For voltage follower applic-
ations where the MIN trimpot is bypassed, connect minus (-) of the follower to this
terminal.
P1-5 (+ARM) Connects to plus (+) Armature wire (A1) on motor. 0-90 VDC for 120 VAC input
OR 0-180 VDC for 240 VAC input. See “SPECIFICATIONS” for output rating.
P1-6 (+FIELD) DO NOT USE for permanent magnet motor. This supplies +Field voltage for
a SHUNT WOUND MOTOR. Refer to Field Voltage table. For motors with dual voltage
field (i.e. 50/100V or 100/200V), make sure highest value is connected.
FIELD VOLTAGE TABLE
VAC INPUT 120 240
VDC FIELD 100 200
P1-7 (-FIELD) DO NOT USE for permanent magnet motor. Connect minus (-) Field wire of
SHUNT WOUND MOTOR.
P1-8 VERY IMPORTANT !!! Refer to “CUSTOMER FUSING” ON PAGE 6.
P1-9 ENCLOSED VERSION: (AC) 120VAC - Connect incoming hot AC (black wire) to
P1-9 and Neutral (white wire) to P1-8. Connect ground
(green wire) to Chassis Ground, as shown in diagram
- page 8.
240VAC - Connect both hot sides, one to P1-8 and
one to P1-9. Also connect ground wire to Chassis
Ground.
P1-10 VERY IMPORTANT !!! Refer to “CUSTOMER FUSING” ON PAGE 6.
P1-11 ENCLOSED VERSION: (SWITCHED AC) No connections to P1-10 and P1-11. This
is for switched AC output. Note “FACTORY WIRING”
(page 8). Pilot lights can be connected between these
terminals. The voltage present at these terminals is
AC input voltage.
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