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CP-8551, CP-8552

Electronic to Pneumatic Transducer

Model Chart

Specifications

The CP-8551 and CP-8552 transducers receive a

variable electronic input signal and produce a

3 to 15 psig (21 to 103 kPa) pneumatic output signal to

position pneumatic damper and valve actuators in

HVAC systems.

Features:

• Durable enclosure with easily accessible wiring terminations.

• Panel or DIN rail mounting for quick, snap-on installation.

• Two-wire loop powered or three-wire voltage input.

• High accuracy with low hysteresis.

• Long-term driftless operation with high repeatability.

• Low air consumption and large air flow capacity.

• Control input protection from short circuit or reverse polarity.

Model No.

CAUTION: This product contains a half-wave rectifier power supply and must not be powered off transformers used to power other devices utilizing non-

isolated full-wave rectifier power supplies. Refer to EN206 F-26363.

Input Signal

Input Impedance

Ohms

Power Requirements

CP-8551 4 to 20 mA

550 maximum,

400 minimum

None

CP-8552

4 to 20 mA

550 maximum,

400 minimum,

4 to 20 mA input,

>10,000 Vac input

None

6 to 9 Vdc,

0 to 10 Vdc

20 to 30 Vac,

24 to 30 Vdc,

3.9 VA,

1.6 W

Input signal Refer to Model Chart.

Rectifier type Half wave, not isolated.

Input range adjustment

CP-8551: Fixed, 16 mAdc.

CP-8552: Jumper selectable. Refer to Model Chart.

Power supply

0 to 10 and 6 to 9 V: Requires 20 to 30 Vac, 3.9 VA (CP-8552), 50/60 Hz, or 24 to 30 Vdc power

supply, 1.6 watts maximum.

Air supply required

20 psig (138 kPa) nominal, 30 psig (207 kPa) maximum. Clean, dry, oil free air required (reference

EN-123, F-22516).

Air consumption for sizing air

compressor

Maximum 0.012 scfm (5.66 ml/s) at 20 psig (138 kPa) supply.

Air capacity for sizing air mains Minimum 550 scim (150.24 mL/s).

Air connections Male barbed fittings for flexible 1/4” O.D. pneumatic tubing.

Wiring connections Screw terminals for 16 to 22 AWG wire.

Output signal 3 to 15 psig (21 to 103 kPa) nominal, direct acting.

Adjustments

CP-8551: None.

CP-8552: 4 to 20 mA range, none; 0 to 10 and 6 to 9 V range, adjustable start point and span

potentiometers.

Maximum pneumatic output 1 to 18 psig (7 to 124 kPa).

Maximum air capacity 515 scim (141 ml/s) maximum with a 20 psig (138 kPa) supply.

Operating characteristics

Linearity ±1% of span at 75°F (24°C).

Hysteresis 0.75% of span at 75°F (24°C).

8551

CP-855