Specifications
19
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MX Protection, Control and Monitoring Features FCD LMENTB2300-01 – 07/08
During configuration, the following parameters may be added to the monitor relay function:
Overtorque•
Inhibit signal active•
ESD signal active (The user can enable or disable “local” mode and “stop” position. Default is •
enabled.)
The monitor relay resets when the faulty state is rectified. The standard contacts are rated for 2.0 A at
30 VDC and 0.5 A at 125 VAC. An optional monitor relay (RM) is available with contacts rated for 5.0 A
at 250 VAC, 30 VDC. The monitor relay can be disabled if the user chooses.
5.3 Optional Alarm Status Contacts (R1, R2, R3, R4, R5, R6, R7, R8)
As an option, up to eight additional latched status contacts may be included. These may be config-
ured in an identical manner to the S contacts.
Default configuration is:
R1 – Normally closed contact at valve fully CLOSE•
R2 – Normally closed contact at valve fully OPEN•
R3 – Normally open contact at valve fully CLOSE•
R4 – Normally open contact at valve fully OPEN•
R5 – Closed contact when motor over temperature•
R6 – Closed contact when remote selected•
R7 – Closed contact when overtorque•
R8 – Normally open contact when analog I/P (input) lost•
The contacts are rated 5.0 A at 250 VAC, 30 VDC.
5.4 Exact End Position Indication
On torque-seated valves, the end-of-travel indication switch trips when the required torque is
achieved at the end of travel—not at the calibrated position limit. This ensures that remote, self-
latched signals will not be disconnected prematurely, and that the valve will be tightly seated.
6. Auxiliary Power Supply - Uninterruptible
Power Supply (UPS) Connection
If the main three-phase power supply is not available during the configuration of the actuator, an
optional module contains provisions for connecting a 24 VDC, 1 A power source to the auxiliary input
terminals shown in the wiring diagram on the following pages. Power supply will draw up to 0.5 A.
7. Isolated Commons
The MX is provided with isolated commons for control functions. Please refer to wiring diagram on
page 29 for locations.