MSC38ASeries

MSC38ASeries
MSC38A MOUNTING DIMENSIONS
4.990"
Total height of control
(including standoffs) is
2.128"
2.750"
MSC38A HOOK-UP FOR DIRECT OPERATION
MSC38A Series
Eight Channel Master
Speed Control
A reliable,
li bl economical
i l master
t speed
d control
t l unit for
operating multiple variable speed drives from a single
5K master potentiometer or field selectable DC voltage
range of 0-5 through 0-25 VDC OR 0-25 through 0-200
VDC input (grounded or ungrounded).
Drives may be controlled to maintain identical speeds
or individually pre-set proportional speeds with respect
to the MSC speed setting.
STANDARD FEATURES
Min
Trimpot
AC1
AC2
Cascade Out
Cascade In
Low
Output to
Control # 1 Wiper
High
Low
Output to
Control # 2 Wiper
High
Low
Output to
Control # 3 Wiper
High
Low
Output to
Wiper
Control # 4
High
DIMENSIONAL SPECIFICATIONS
HEIGHT
LENGTH
WEIGHT
2.13
5.40
7.4 oz
13.73
208.3 gm
Metric (centimeters)
7.95
5.41
OPERATING CONDITIONS
Temperature .................... -10° to +45° C. (15° to 113° F.)
AC Input Voltage ................. ± 10% Rated Line Voltage
Input Frequency ...........................................50/60 Hertz
Output Voltage ... 0-5 through 0-25 VDC each channel
Output Current ................................ 10 mA per channel
www.dartcontrols.com
Gain
Trimpot
(can be used in place
of Master Speedpot)
INPUT HOOK-UP FOR RATIO OPERATION
RATIO
CONTROL
10K-250K
OHM
FROM
MSC
increase
LOW
CONTROL UNIT
(i.e. 500, 250, 125 SERIES
approx.
5K
WIPER
HIGH
SPEEDPOT LO
SPEEDPOT WIPER
SPEEDPOT HI
+ ARMATURE
- ARMATURE
+ FIELD
- FIELD
SPARE
SPARE
AC INPUT
AC INPUT
CASCADE HOOK-UP FOR BASIC CONTROLS
English (inches)
3.13
Master
Speedpot
-3-2-1
P3
Common
High
High
Wiper
Wiper
Low
Low
High
Output to
Wiper Control # 8
Low
High
Output to
Wiper Control # 7
Low
High
Output to
Wiper Control # 6
Low
High
Output to
Wiper Control # 5
Low
P2
Optional DC
Voltage Source
P1
• 120 VAC ±10%, 50/60 Hz. line source
• Eight (3-wire) output channels - each optically isolated
• MSC38A may be cascaded to operate more than 8 drives
• Master command input circuit electrically isolated from
AC
• Rapid response time
• European style terminal block connectors
• Supply voltage of driven unit is 5-25 VDC maximum
• 5K ohm speedpot with 8" leads, dial, and knob for
remote mounting included
• Interfaces with Dart 125, 250, or 500 series controls or
most other manufacturer’s drives
• Outputs are controlled via a 5K ohm master speedpot
or a field selectable DC voltage signal (0-5 through 0-25
VDC OR 0-25 through 0-200 VDC)
• Each output is capable of driving input impedances as low
as 500 ohm
WIDTH
For 0-5VDC through 0-25VDC,
connect P3-1 to P3-2;
For 0-25VDC through 0-200VDC,
connect P3-2 to P3-3
Common
Master
Speedpot
Common
MSC # 1
Cascade Out
Common
MSC # 2
MSC # 3
Cascade In
Cascade In
For more than 8 outputs using a single Master speedpot, controls can be
cascaded together via the cascade and common terminals shown above.
27
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