2

DESCRIPTION (Cont’d)

Four control points, each having a setpoint and PID parameter set, are

available for instant front panel implementation during batch changeover, or

other process conditions. A control point may have its PID gain set values

disabled when implementing the control point.

The optional RS485 multidrop serial communications interface provides the

capability of two-way communication between a PSC unit and other compatible

equipment such as a printer, a programmable controller, or a host computer. In

multipoint applications the address number of each unit on the line can be

programmed from 0 to 99. Up to thirty-two units can be installed on a single pair

of wires. The Setpoint value, % Output Power, Setpoint Ramp Rate, etc. can be

interrogated or changed by sending the proper command code via serial

communications.Alarm output(s) may also be reset via the serial communications

interface option.

Optional alarm output(s) may be configured to operate as a timed event

output or as a standard alarm output. As an alarm output it may be configured to

activate according to a variety of actions (Absolute HI or LO, Deviation HI or

LO, or Band IN or OUT) with adjustable hysteresis. Also, a standby feature

suppresses the output(s) on power-up until the process stabilizes outside the

alarm region. Timed event output(s) allow the controller to activate other

equipment while a programmed profile is running. Each profile can define up to

16 event states (phases), for each output(s).

An optional secondary output is available for processes that require cooling

which provides increased control accuracy and response.

The optional linear 4 to 20 mA or 0 to 10 VDC output signal is available to

interface with final actuators, chart recorders, indicators, or other controllers. The

output signal can be digitally scaled and selected to transmit one of the following:

% Output Power

Measurement Value

Measurement Value Deviation

Setpoint Value

An optional Type 4X/IP65 rated bezel is available for washdown and/or dirty

environments, when properly installed. Modern surface-mount technology,

extensive testing, plus high immunity to noise interference, makes the controller

extremely reliable in industrial environments.

SAFETY SUMMARY

All safety related regulations, local codes and instructions that appear in the

manual or on equipment must be observed to ensure personal safety and to

prevent damage to either the instrument or equipment connected to it. If

equipment is used in a manner not specified by the manufacturer, the protection

provided by the equipment may be impaired.

Do not use the PSC to directly command motors, valves, or other actuators

not equipped with safeguards. To do so, can be potentially harmful to persons or

equipment in the event of a fault to the unit. An independent and redundant

process limit indicator with alarm outputs is strongly recommended. The

indicators should have input sensors and AC power feeds independent from

other equipment.

SPECIFICATIONS

1. DISPLAY: Dual 4-digit

Upper Process Display: 0.4" (10.2 mm) Red LED

Lower Auxiliary Display: 0.3" (7.6 mm) Green LED

Display Messages:

“OLOL”

- Appears when measurement exceeds +105% of input range.

“ULUL”

- Appears when measurement exceeds -5% of input range.

“SENS”

- Appears when measurement exceeds “OLOL” & “ULUL”

range.

“....”

- Appears when display value exceeds + display range.

“-...”

- Appears when display value exceeds - display range.

2. POWER: Switch selectable 115/230 VAC (+10%, -15%) no observable line

variation effect, 48 to 62 Hz, 10 VA.

3. ANNUNCIATORS:

6 LED Backlight Status Indicators:

%PW

- Lower auxiliary display shows power output in (%).

PGM

- Lower auxiliary display shows profile status or profile time

remaining.

MAN

- Controller is in manual mode.

OP1

- Main control output is active.

AL1

- Alarm #1 is active.

AL2

- Alarm #2 is active (for Dual Alarm Option).

OP2

- Secondary output is active (for Secondary Option).

4. CONTROLS: Four front panel push buttons for modifying and setup of

controller functions and one external input.

5. SETPOINT PROFILE:

Profiles: 4

Segments Per Profile: 8 ramp/hold segments (linkable to 32 segments).

Ramp Rate: 0.1 to 999.9 units/minute or no ramp.

Hold Time: Off or from 0.1 to 999.9 minutes, can be extended to 500 hours

by linking.

Error Band Conformity: Off or from 1 to 9999 units deviation, + value for

hold phases, - value for both ramp and hold phases.

Power-On Modes: Stop, auto-start, or profile resume.

Start Mode: Ramps from process value.

Program Auto Cycle: 1 to 249, or continuous.

Event Outputs: 2, time activated with profile [uses Alarm output(s)].

Control: Front panel buttons, user input, or RS485 communications.

6. CONTROL POINTS:

Setpoints: 4

PID gain sets: 4

Control: Front panel buttons or user input.

7. SIGNAL INPUT:

Sample Period: 100 msec

Response Time: 300 msec (to within 99% of final value w/step input).

Signal Overdrive Threshold:

10 V Range: 13 V

20 mA Range: 26 mA

Signal Overdrive Response:

Main Control Output: Programmable preset output.

Display: “SENS”

DC Linear: Programmable preset output.

Normal Mode Rejection: 40 db @ 50/60 Hz (improves with increased

digital filtering).

Common Mode Rejection: 100 db, DC to 50/60 Hz.

8. RANGE AND ACCURACY:

Signal Range

Accuracy (% of

Unscaled Reading)

Max. Input

Input

Impedance

Resolution

0 to 10 VDC

±(0.15% + 3 mV)

300 VDC

1M Ω

10 mV

0 to 20 mADC

±(0.15% + 6 µA)

200 mADC

10 Ω

10 µA

9. OUTPUT MODULES (For All Output Channels):

(Optional - Must be ordered separately)

Relay:

Type: Form-C (Form-A with RS485 option)

Rating: 5 Amps @ 120/240 VAC or 28 VDC (resistive load), 1/8 HP @

120 VAC (inductive load).

Life Expectancy: 100,000 cycles at max. rating. (Decreasing load and/or

increasing cycle time, increases life expectancy).

Logic/SSR Drive: Can drive multiple SSR Power Units.

Type: Non-isolated switched DC, 12 VDC typical

Drive: 45 mA max.

Triac:

Type: Isolated, Zero Crossing Detection.

Ratings: Voltage: 120/240 VAC

Max Load Current: 1 AMP @ 35°C

0.75 AMP @ 50°C

Min Load Current: 10 mA

Off State Leakage Current: 7 mA max. @ 60 Hz

Operating Frequency: 20 to 500 Hz

Protection: Internal Transient Snubber, Fused.

10. MAIN CONTROL OUTPUT:

Control: PID or ON/OFF.

Output: Time proportioning or linear DC.

Hardware: Plug-in, replaceable output modules.

Cycle time: Programmable.

Auto-tune: When performed, sets proportional band, integral time, and

derivative time values.

Probe Break Action: Programmable.

11. SECONDARY OUTPUT (Optional):

Control: PID or ON/OFF.

Output: Time proportioning or linear DC

Hardware: Plug-in, replaceable output modules.

Cycle time: Programmable.

Proportional Gain Adjust: Programmable.

DeadBand Overlap: Programmable.

12. LINEAR DC DRIVE (Optional): With digital scale and offset,

programmable deadband and update time.

4 to 20 mA:

Resolution: 1 part in 3500 typ.

Accuracy: ±(0.1% of reading + 25 µA).

Compliance: 10 V (500 Ω max. loop impedance).

0 to 10 VDC:

Resolution: 1 part in 3500 typ.

Accuracy: ±(0.1% of reading + 35 mV).

Min. Load Resistance: 10 K Ω (1 mA max.)

Source: % output power, setpoint, deviation, or process value.

(Available for OP1 or OP2, but not both.)