Despatch P1400+ Temperature Controller - Manual (Page 7)

SECTION 1: INTRODUCTION
1.1 General
These instruments are microprocessor based process controllers. They can measure, display or
control process variables such as temperature, pressure, flow and level from a variety of inputs.
The operating voltage is either 100-240V at 50/60 Hz or 24V-48V AC/DC depending on the model
purchased. EEPROM technology protects against data or configuration loss during power outages.
Inputs are user configurable for connection to thermocouple and RTD probes, as well as linear
process signal types such as mVDC, VDC or mADC. Output options include relays, SSR drivers,
triacs or linear mV/voltage modules. These can be used for process control, valve control, alarms or
retransmission of the process variable or setpoint to external devices such as data recorders or
PLC’s. A Transmitter Power Supply option module can provide an unregulated 24V DC (22mA)
auxiliary output voltage for external signal transmitters.
Alarm indication is standard on all instruments. Alarms may be set as process high or low, deviation
(active above or below controller setpoint), band (active both above and below setpoint), or control
loop types. These alarms can be linked to any suitable output. Alarm status is indicated by LED’s or
the alarm status screen.
Controllers can be programmed for on-off, time proportioning, or current proportioning control
implementations, depending on the output modules fitted, and feature manual or automatic tuning of
the PID parameters. A secondary control output is available when additional output modules are
fitted. Optional analogue controller Remote Setpoint inputs are included in the range. Control
functions, alarm settings and other parameters are easily adjusted from the front keypad or via PC
based configuration software.