Specifications

18
MX Protection, Control and Monitoring Features FCD LMENTB2300-01 – 07/08
5. Remote Facilities
5.1 Actuator Status Contacts (S1a, S1b, S2a, S2b)
Four latched contacts provide remote feedback of actuator status. Two (S1a, S2a) contacts may
be individually configured for normally open, normally closed, or blinker (continuous opening and
closing of the valve) operation and provide feedback of one of the functions listed below. Two other
relays are complementary.
Closed   •Motorovertemp•
Closing  •Overtorque•
Mid-travel  •Opentorqueswitch•
Opening  •Closetorqueswitch•
Open   •ESDsignal•
Stopped  •Openinhibit•
Valvemoving  •Closeinhibit•
Localselected  •Lostphase•
LocalSTOP/OFF  •Noanalogsignal•
Manualoperation  •Hardwarefailure•
Valvejammed  •Networkcontrolled•
Remoteselected  •CSEcontrolled•
Default settings are:
S1a – Normally closed contact at valve fully CLOSE•
S1b – Normally closed contact at valve fully OPEN•
S2a – Normally open contact at valve fully CLOSE•
S2b – Normally open contact at valve fully OPEN•
The standard contacts are rated for 2.0 A at 30 VDC and 0.5 A at 125 VAC.
5.2 Monitor Relay (SM)
The monitor relay provides immediate indication of problems that prevent remote valve operation. It
has a normally open contact and a normally closed contact (1 x SPDT contact) and is energized when
the three-phase supply is present and the actuator is in a normal/healthy state.
The relay will de-energize if any of the following events occur:
Loss of one or more phases of the three-phase power supply•
Loss of internal control supply•
Jammed valve detected•
Motor overtemp is active (unless thermostat is configured to OFF)•
Selector switch is in “Local” mode•
Selector switch is in “Stop” position•