Yokogawa UT32A-D Dual-Loop Digital Indicating Controller

Two independent PID loops in one 48 x 96 mm panel cut-out

The Yokogawa UT32A-D is the dual-loop version of the UT32A. It puts two independent control loops in a narrow 48 x 96 mm panel instrument, with two universal inputs, two control outputs and a 14-segment colour LCD whose PV colour changes on alarm. It suits skids and machines that run two temperature or two pressure loops side by side, such as twin heating zones, a heater and a cooler, or two extruder or dryer zones, where two single-loop controllers would otherwise take twice the panel space.

Each loop has PID or ON/OFF control, four target setpoints, four alarm setpoints and four PID parameter sets, auto-tuning in Normal or Stable mode, the Super overshoot-suppressing and Super 2 hunting-suppressing functions, and preset output functions for stop, input error and manual operation. The control period is 200 ms. A ladder sequence function is standard and LL50A parameter-setting software (sold separately) builds ladder programs on a PC.

Technical specifications

Inputs, outputs and model code

The two universal inputs accept thermocouples, RTDs and DC voltage or current signals, with the accuracy table shown on the datasheet (for example plus or minus 0.1 percent of the instrument range for most ranges). There are two control outputs, each available as a current output (4 to 20 mA or 0 to 20 mA) or voltage pulse for time-proportional control, plus two 1a control relay contacts rated 3 A at 240 V AC or 3 A at 30 V DC. Alarms are three 1a relay outputs rated 1 A at 240 V AC or 30 V DC, and three contact inputs are standard. A heater break alarm option measures heater current through an external current transformer.

The model code is UT32A with Type 1 fixed at -D (dual-loop type), Type 2 (0 none, 1 RS-485 up to 38.4 kbps, 2-wire or 4-wire), Type 3 fixed 0, display language (-1 English, -2 German, -3 French, -4 Spanish), case colour (0 white, 1 black) and fixed code -00. Option codes are /HA heater break alarm (when Type 2 is 0), /DC 24 V AC/DC supply, /CT coating and /CV terminal cover. The /CT option removes UL, CSA and CE conformity. DIN-rail mounting is covered separately in GS 05P08D81-01EN.

Installation and what to confirm before ordering

The front is IP66 (NEMA 4 for the hose-down test only), the case is polycarbonate (UL94 V-0), weight is 0.5 kg or less, the panel depth is 65 mm and wiring is by M3 screw terminals. Supply is 100 to 240 V AC at 15 VA, or 24 V AC/DC with /DC. Operating temperature is -10 to 50 C. Confirm that two independent loops are what you need rather than cascade control, which belongs to the UT55A and UT75A; the sensor types for each loop; the output type for each actuator; RS-485 if a PLC connection is needed; and the panel cutout. The attached file is the Yokogawa general specification GS 05P08D31-01EN for the UT32A-D. Other controllers are in controllers and data acquisition. Send the full code for a quotation.

How the Yokogawa UT32A-D works

Each loop reads its own input and compares it with the target setpoint. The controller then calculates a PID output for that loop. It sends the output to the heater, valve or other final element. Both loops run side by side in the same case.

Where the UT32A-D is used

• Twin heating zones
• Heater and cooler pairs
• Extruder zones
• Dryer zones
• Machine and skid panels

Selection checklist for the UT32A-D

• Input signal types
• Output type per loop
• Relay or current output
• Alarm count
• Communication need
• Supply voltage
• Panel cut-out
• Ladder program need

Installation, commissioning and maintenance notes for the UT32A-D

Cut the 48 x 96 mm panel opening and fit the controller from the front. Wire the two inputs and the two outputs. Set the input type and range for each loop. Run auto-tuning on each loop and check the alarms.

Requesting a quotation for the Yokogawa UT32A-D

Please send the input types, the output types and the supply voltage. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

UT32A-D controller type

It is a dual-loop digital indicating controller.

UT32A-D panel size

It fits a 48 x 96 mm panel cut-out.

UT32A-D control loops

It has two independent control loops.

UT32A-D control mode

Each loop uses PID or ON/OFF control.

UT32A-D control period

The control period is 200 ms.

UT32A-D universal inputs

It has two universal inputs.

UT32A-D input types

The inputs take thermocouple, RTD, DC voltage and DC current.

UT32A-D control outputs

It has two control outputs.

UT32A-D output types

The outputs are 4-20 mA, 0-20 mA or voltage pulse.

UT32A-D relay outputs

Two 1a relays carry 3 A at 240 V AC.

UT32A-D alarm relays

Three 1a alarm relays carry 1 A at 240 V AC.

UT32A-D contact inputs

It has 3 contact inputs as standard.

UT32A-D setpoints

Each loop has 4 target setpoints and 4 alarm setpoints.

UT32A-D PID sets

Each loop has 4 PID parameter sets.

UT32A-D display

It has a 14-segment colour LCD.

UT32A-D alarm colour

The PV colour changes on alarm.

UT32A-D auto-tuning

Auto-tuning works in Normal or Stable mode.

UT32A-D overshoot function

The Super function suppresses overshoot.

UT32A-D hunting function

The Super 2 function suppresses hunting.

UT32A-D ladder sequence

A ladder sequence function is standard.

UT32A-D programming software

LL50A software builds ladder programs on a PC and is sold separately.

UT32A-D communication

It has RS-485 up to 38.4 kbps.

UT32A-D front protection

The front panel is rated IP66.

UT32A-D supply

Supply is 100-240 V AC, or 24 V AC/DC with the /DC option.

UT32A-D depth and weight

It is 65 mm deep and weighs 0.5 kg or less.

Controller records for the UT32A-D

Record the tuning values and the alarm settings for each loop.

Choosing the right UT32A-D output type

Choose the output type from the heater or valve you drive.