MEXL

Final Control Elements

VALVE POSITIONER

(for LonWorks; built-in SSR)
Functions & Features
• LonWorks compatible
• Used for 24 - 200 V AC electric actuator position control
• Position feedback via potentiometer (100 Ω - 10 kΩ unadjusted)
• Direct motor driving with built-in SSR (with zero-cross circuit)
• Restart control timer built-in to prevent motor overheating due to frequent on/off switching
Typical Applications
• Retrofitting existing equipment for LonWorks compatibility
 

MODEL: MEXL–11[1]–[2][3]

ORDERING INFORMATION

• Code number: MEXL-11[1]-[2][3]
Specify a code from below for each of [1] through [3].
  (e.g. MEXL-111-G/Q)
• Specify the specification for option code /Q
  (e.g. /C01/S01)

FEEDBACK RESISTANCE

1: Potentiometer

CONTROL OUTPUT

1: SSRs incorporated

[1] BREAK

0: None
1: With

[2] POWER INPUT

AC Power
A: 24 V AC
B: 100 V AC
C: 110 V AC
G: 200 V AC
H: 220 V AC

[3] OPTIONS

blank: none
/Q: With options (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)

COATING (For the detail, refer to our web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating
TERMINAL SCREW MATERIAL
/S01: Stainless steel

EXTERNAL INTERFACE FILE

MEXL external interface file MEXL.XIF downloadable at our web site.

GENERAL SPECIFICATIONS

Construction: Plug-in
Connection: M3.5 screw terminals
Screw terminal: Chromated steel (standard) or stainless steel
Housing material: Flame-resistant resin (black)
Full-closed position adjustment range: 0 - 25 % (front)
Full-open position adjustment range: 75 - 100 % (front)
Deadband adjustment: 0.1 – 8.0 % (front adj.; refer to the table below)
Isolation: LonWorks to feedback potentiometer to control output to power to ground
RUN LED:
Blinking at 0.5 Hz in normal operating conditions
Blinking at 2 Hz when lock protection timer is operating
Blinking at 5 Hz for 3 seconds during Wink
Manual operation switch: Manual full-close or full-open position command

LonWorks COMMUNICATION

Neuron chip: TMPN3120
Transceiver: FTT-10A (78 kbps, free topology)
Service pin: Node structure, for installation
Reset switch: Neuron chip reset
Service LED: ON when no valid application code is held or when malfunctioning
Blinking at 0.5 Hz when network address information is not configured

INPUT SPECIFICATIONS

• Feedback potentiometer: 100 Ω – 10 kΩ
Minimum span: 50 % of totalresistance
Excitation: 3.3 V DC

OUTPUT SPECIFICATIONS

■ Control Output: SSR (zero-crossing); 20 - 240 V AC 0.1 - 1 A

INSTALLATION

Power input
•AC: Operational voltage range: rating ±10 %,
50/60 ±2 Hz, approx. 3 VA
Operating temperature: -5 to +60°C (23 to 140°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 300 g (0.66 lb)

PERFORMANCE

Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute (LonWorks or feedback potentiometer to control output to power to ground)
500 V AC @1 minute (LonWorks to feedback potentiometer)

EXTERNAL VIEW

NETWORK VARIABLES

Refer to the instruction manual for details.

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

EXPLANATIONS OF TERMS

• SSR (Solid State Relay)
Composed only of semiconductor parts, SSR is free from arc discharge or chattering which is typical with electromagnetic relays. It features excellent characteristics against vibration, physical impact or other environmental conditions.
• Zero-Cross Function
SSR with zero-cross function turns on when AC power voltage is near zero, creating delay of switching when input is provided in the middle of an wave cycle, thus limiting transient switching noise voltage and rush current.

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