Light Relay; Auxiliary Relay - Oa2=Aus; On/Off Relay (Oa2=Onf); Neutral Zone Regulation - Emerson Dixell XR75CX Series Installation And Operation Manual

3.4.1. Light Relay

When oA2 = Lig, the relay 1-2 operates as a light.
3.4.2. Auxiliary Relay — oA2=AUS
a. Relay Activation By Digital Input 2 (oA2 = AUS,
i2F = AUS)
When oA2 = AUS and i2F = AUS, the relay 1-2 is switched
ON and OFF by the digital input.
b. Auxiliary Thermostat
An anti-condensing heater with the possibility of switching
it ON and OFF with the keyboard.
Parameters Involved
• ACH - The kind of regulation for the auxiliary relay:
Ht: heating; CL: cooling
• SAA - Setpoint for auxiliary relay
• SHY - Differential for auxiliary relay
• ArP - Probe for auxiliary relay
• Sdd - Auxiliary output OFF during defrost
The differential is set by the SHY parameter.
NOTE: Set oA2 =AUS and ArP= nP (no probe
for auxiliary output). In this case, the relay 1-2
can be activated only by the digital input with
i1F or i2F = AUS.

3.4.3. On/Off Relay (oA2=onF)

When oA2 = onF, the relay is activated when the controller
is turned ON and de-activated when the controller is turned
OFF.

3.4.4. Neutral Zone Regulation

When oA2 = db, the relay 1-2 can control a heater 
element to perform a neutral zone action.
• oA2 cut in = SET-HY
• oA2 cut out = SET

3.4.5. Alarm Relay

When oA2 = ALr, the relay 1-2 operates as an alarm relay.
It is activated every time an alarm occurs. Its status depends
on the tbA parameter: if tbA = y, the relay is silenced by
pressing any key. If tbA = n, the alarm relay remains ON
until the alarm condition recovers.
3.4.6. Night Blind Management
During Energy Saving Cycles
With oA2 = HES, the relay 1-2 operates to manage the
night blind: the relay is powered when the energy saving
cycle is activated by a digital input, front panel button.
Light Relay Configuration (PAR oA2; Terminals 1-2) Controlling Loads • 3