Manual

41
Outputs
The Protocol Plus control has seven different outputs available.
• Heating output: The control output is a DC voltage open-collector output which
is time-proportioned and designed to control a heat control device such as a solid
state relay.
• High limit: The high limit output is a form C relay which is energized under
normal operating conditions. If the control senses a temperature higher than the
high limit setpoint, or if there is a sensor error, the high limit relay will de-energize
until the condition is cleared and the Reset key is pressed. When the high limit
relay is de-energized, the heater is disabled.
• Retransmission: The retransmission output is a DC 1 to 5 volt or 4 to 20 ma
(DC) signal that is proportional to the process temperature. The signal can be an
input to other devices such as a chart recorder.
• Relay (four optional outputs): The four form A dry contact relay outputs can be
configured to function as alarms, events, or end of cycle. These outputs can be
utilized in Manual, Timer, or Profile Mode.
Layout for Optional Components