The compact Model 7SC is a dual display general purpose
1/16 DIN PID controller with autotuning and 3 configurable outputs.
It is similar to the 7SF, but with OP1 as a programmable analog output
for heating, cooling or analog retransmission. OP2 (time proportioning
relay) is used for heating/cooling (air, oil or water) or alarm. OP3
can be an alarm or a heat/cool output if OP2 is configured as an alarm.
Alarms can be process, band or deviation type, direct or reverse,
with masking and automatic or manual reset. A logic input is fitted
as standard, allowing remote selection of an auxiliary
setpoint. Bumpless Auto/Manual control
can be selected from the front panel. Detection of an out of range
or sensor break forces the output to a safe value (Auto Comp™
sensor break). The 7SC is available with optically isolated RS-485
communications in three protocols for use with supervisory systems.
This easy to use instrument comes with factory calibrated inputs and
can be configured from the front panel or via the communications port.
NEMA 4X sealing allows use in washdown or dust conditions.
Optically Isolated Analog Output
Main Output (Heating or Cooling),
Secondary Output (Cooling),
Analog Retransmission of the Process Variable or Setpoint
This is an isolated analog output with a maximum load of 500 ohms.
The 7SC has an
optically isolated linear analog output, programmable as a control
output for heating or cooling, or as a filtered retransmission of
process variable or setpoint. Other Features
The externally selected (logic input) transfer betweeen SP1 and SP2
can be a step or a ramp with two configurable rates of change (ramp
up/ramp down). The 7SC also has an "output off" function, allowing
the instrument to disable control and act as an indicator.
Universal Input (7 T/C, RTD, mV, V, mA)
