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MM3200
VALVE OR ACTUATOR CONTROLLER
ADJUSTABLE DEADBAND
POTENTIOMETER FEEDBACK

FEATURES
bulletProvides Relay Contact Closures by Comparing a DC Input to a Potentiometer Position Input
bulletRelay Safety Interlock
bulletPotentiometer Values from 120 ohms to 100 kilohms
bulletAdjustable Deadband (Differential)
bulletUnlimited* Choice of Input Ranges
bullet10 + 5 Year Warranty


DESCRIPTION

The MM3200 controller compares a DC input signal to a DC signal from the slide position of a potentiometer in a valve or linear actuator. The module has two spst relays to provide bi-directional (open-close) ON/OFF switches. When the input signals are unequal, the MM3200 provides a contact closure to turn on a motor which drives the valve open or closed. When the signals become equal, the contact opens and the motor stops. The deadband control adjusts the sensitivity of the module and determines the amount of error required before the relay closes.  Adjustment of 0.25% to 50% of span is available.

Two relays are used for the open and close switches. Each relay has dpdt contacts. One set is used for motor control. The other set is used to control the supply voltage to the other relay coil. This relay safety interlock feature makes it impossible to have both relays closed (both motors on) at the same time.

The module can also be used with a manual potentiometer and the contact closures to drive a process until the DC input signal matches the potentiometer setting.

The module includes filtering and conditioning to reduce susceptibility to transients and noisy operations. They also utilize a stable -1.23 V power supply to excite the potentiometer.

TYPICAL APPLICATIONS

Valve or actuator position control, pH acid/base pump control, etc.

MOUNTING

The module is designed to plug into a standard 11-pin relay socket. Part number MP011 is a molded plastic socket suitable for mounting on a flat surface or in a 2 3/4 inch wide PVC snap track (TRK48). Use CLP-1 hold-down clip if needed. A Killark HK Series explosion-proof housing with dome and 11-pin socket is available (HKB-HK2D-11).  An 11-pin DIN rail mounted socket (P/N DMP011) is available for 35mm symmetrical rail.

SPECIFICATIONS

INPUT RANGE
Voltage
  Select any range from 
  0 to 1 VDC  min
  0 to 10 VDC max

Current
  4/20 mA (others available)

INPUT IMPEDANCE
Voltage
  100 kilohms

Current
  62 ohms

POTENTIOMETER FEEDBACK
70% or greater rotation required to match full scale input

POTENTIOMETER RESISTANCE
select any value from 120 ohms to 100 kilohms

EXCITATION
-1.23 V
  10 mA max load

DEADBAND
0.25% to 50% of span

RESPONSE TIME
120 ms typical

ACCURACY
±0.1% of span

COMMON MODE REJECTION
 120 dB, DC to 60 Hz

RELAY CONTACT
 (2 each spst)
Resistive Load:
  5 A max, 150 W max
  220 VAC max, 30 VDC max

Inductive Load
  (Power factor > = 0.4):
  2.5 A max, 75 W max,
  220 VAC max, 30 VDC max

OPERATING TEMPERATURE
 14°F to 140°F
-10°C to  60°C

TEMPERATURE STABILITY
±0.02% of span/°C max

POWER
 115 VAC ± 10 %, 50/60 Hz
  (2.5 W max)
230 VAC ± 10 %, 50/60 Hz
  (2.5 W max)

 

* Within specified range limits


CONNECTIONS
Power AC L1 or DC +
Power AC L2 or DC -
Control Input +
Control Input -
Feedback (POT) Common
Feedback (POT) Wiper
Feedback (POT) Excitation
Relay Common
Close Relay NO
Open  Relay NO 		PIN
1
3
4
5
6
7
8
9
10
11