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CP-8122

TAC System 8000 Two-Input Temperature or Humidity

Controller

Model Chart

Specifications

This controller provides precision control for mixed

air dampers, heating and cooling valves, make up

air units, chillers, laboratories, computer rooms,

test chambers, and other applications.

Features:

• TAC System 8000 two input controller.

• Automatic reset action.

• Control signal inversion capability.

• High signal selection.

• Ramp up and ramp down operation.

• Anti wind-up capability.

Model No. Description

CP-8122 Refer to Specifications.

Sensors

Temperature TS-8000 series one or two; three sensors through a CN-8101 multi-purpose bridge.

Humidity HS-8x01, VER-HDxx-MSx, VER-HOxx-MSx, VER-HxWx-MA.

Setpoint adjusters SPA and SPB, 41 to 95°F (5 to 35°C).

Remote setpoints Order separately AT-8122, AT-8155, or AT-8158.

Throttling range 10 F degrees (5 C degrees) factory set, 20 and 30 F degrees (11 and 17 C degrees) pin selectable.

Authority ratio adjustment Factory set 1:1, pin selectable 0.5, 0.75, 15:1, others available.

Bridge action Factory set, “A”, D.A. (direct acting), “B” R.A. (reverse acting), can be made reverse acting.

Auxiliary bridge input For remote setpoint adjusters, night setback, etc.

Control amplifier output voltage

(OP1)

2 to 15 Vdc. Unit factory calibrated for 7.5 Vdc output with sensor at setpoint temperature.

Integral action time Dial adjustable 0.3 to 3 repeats per minute.

Integral action limiter

Limits output signal from integral action section to 2 Vdc above input signal in ramp up mode or

2 Vdc below input signal in ramp down mode.

Anti-wind-up or down

On system startup, normal proportional control signal from OP2 until the input voltage to IV1 is less

than 7.5 Vdc (anti-wind-up) or greater than 7.5 Vdc (anti-wind-down), at which point integral action is

initiated.

Signal inversion Adjustable at SPC from 5.5 Vdc above or below the input signal at IV2.

Softstart On system startup.

Time Adjustable 3 to 60 minutes for 3 Vdc output change.

Start point Adjustable 0 to 15 Vdc.

Restart Momentary contact closure between RST and COM restarts ramp function.

Power requirements 20 Vdc, 40 mA +2 mA per TAC System 8000 controlled device.

Power supply available

6.2 Vdc 4 mA maximum. This regulated and filtered power supply must not be connected to +6.2 or

red lead of other supplies.

Calibration potentiometers Internal.

Number of controlled devices Maximum of six TAC System 8000.

8122