The

Series DHC Digihelic® Differential Pressure Controller is a 3-in-1 instrument

possessing a digital display gage, control relay switches, and a transmitter with both

current and voltage outputs. Combining these 3 features allows the reduction of

several instruments with one product, saving inventory, installation time, and cost.

The Series DHC Digihelic® differential pressure controller is the ideal instrument for

pressure, velocity, and volumetric flow applications reading in several commonly

used engineering units with optional unidirectional or bidirectional ranges. These

units achieve a 1.5% or better accuracy on extremely low ranges, and 0.5% accuracy

for ranges at or above 1 in w.c. Calibration can be performed in the field, making

maintaining its accuracy more manageble. Additionally, the Series DHC Digihelic®

differential pressure controller includes 2 SPDT control relays with adjustable

deadbands. Programming the unit is simple using the built-in menu. With scalable

4-20 mA, selectable voltage process outputs, and selectable Modbus® or BACnet

communication, this controller can easily fit into your application.

BENEFITS/FEATURES

• One instrument saves inventory, installation time, and money with its measurement

versatility and innovative 3-in-1 design

• Measurement precision via full-scale accuracy of 1.5% or better on extremely low

ranges, and 0.5% for ranges at or above 1 in w.c.

• Safe and secure with security menu programming

• Simplified field upgrade to DHC pressure controller with optional stainless steel

bezel

APPLICATIONS

• SCFM duct flow

• Filter status

• Duct or building static pressure

• Damper and fan control

SPECIFICATIONS

Service: Air and non-combustible, compatible gases.

Wetted Materials: Consult factory.

Housing Material: Polycarbonate.

Accuracy: ±0.5% FSO for all ranges, except 0.5 in w.c. @ ±1% FSO, and ranges

at or below ±0.25 in w.c. @ ±1.5% FSO.

Stability: < ±1% / year FSO.

Pressure Limits: Ranges > 1 in w.c.: 6 psi max operation, 6 psi burst; Ranges ≤ 1

in w.c.: 3.6 psi max operation, 6 psi burst.

Temperature Limits: -4 to 158°F (-20 to 70°C).

Thermal Effects: .02% FS / °F (.036% FS / °C).

Power Requirements: 12-28 VDC or 12-28 VAC 50 to 400 Hz.

Power Consumption: 3 VA max.

Output Signal: 4-20 mA (4-wire); 0-10 V, 0-5 V, 1-5 V, and 2-10 V (4-wire).

Communication: BACnet MS/TP or Modbus® RTU.

Supported Baud Rate: 9600, 19200, 38400, 57600, 76800, 115200.

Device Load: 1/8 unit load.

Zero and Span Adjustments: Accessible via menus.

Response Time: 400 ms (damping set to 0).

Display: Backlit LCD display, LED setpoint indicators.

Electrical Connections: 15 pin male high density D-sub connection. 18˝ (46 cm)

cable with 15 conductors included.

Process Connections: 1/8˝ female NPT ports on side and back.

Enclosure Rating: NEMA 4X (IP66).

Mounting Orientation: Not position sensitive.

Size: 5˝ OD (127 mm) x 1.9˝ (48 mm) deep.

Weight: 8.8 oz (250 g).

Compliance: BTL, CE.

SWITCH SPECIFICATIONS

Switch Type: 2 SPDT relays.

Electrical Rating: 1 A @ 30 VAC/VDC.

Set Point Adjustment: Accessible via menus.

DIGIHELIC® DIFFERENTIAL PRESSURE CONTROLLER

3-in-1 Differential Pressure Controller

SERIES DHC

MODEL CHART

Model

Range

Model

Range

DHC-002

DHC-003

DHC-004

DHC-006

DHC-008

DHC-009

DHC-010

DHC-011

DHC-012

DHC-202

DHC-203

DHC-204

DHC-206

0.25 in w.c.

0.5 in w.c.

1 in w.c.

2.5 in w.c.

5 in w.c.

10 in w.c.

25 in w.c.

50 in w.c.

100 in w.c.

±0.25 in w.c.

±0.5 in w.c.

±1 in w.c.

±2.5 in w.c.

DHC-208

DHC-209

DHC-053

DHC-055

DHC-056

DHC-253

DHC-255

DHC-256

DHC-082

DHC-084

DHC-282

DHC-284

±5 in w.c.

±10 in w.c.

60 Pa

125 Pa

250 Pa

±60 Pa

±125 Pa

±250 Pa

6 mm w.c.

25 mm w.c.

±6 mm w.c.

±25 mm w.c.

ACCESSORIES

Model

Description

A-299

A-300

A-301

A-302

A-302F-A

A-330

A-331

A-489

Surface mounting bracket

Flat flush mounting bracket

Static pressure tip for 1/4˝ metal tubing connection

Static pressure tip, for 3/16˝ and 1/8˝ ID plastic or rubber tubing.

303 SS Static pressure tip with mounting flange, for 3/16˝ I.D. rubber or

plastic tubing. 4˝ insertion depth, includes mounting screws

1/8˝ pipe plug, socket hex, plated steel.

1/8˝ NPT filter vent plug, nylon and sintered metal

4˝ straight static pressure tip with flange

CALIBRATION SERVICES AVAILABLE

®

Modbus® is a registered trademark of Schneider Automation, Inc.

1-3/8

[34.93]

53/64

[20.96]

1 [25.40]

HIGH

PRESSURE

PORT

LOW

PRESSURE

PORT

1 [25.40]

1/8 FEMALE NPT HIGH

PRESSURE CONNECTION

Ø5 [127.00]

1/2 [12.70]

3x Ø3/16 [4.77] HOLES EQUALLY

SPACED ON A 4-1/8 [104.78] B.C.

SURFACE MOUNTING

1/8 FEMALE NPT LOW

PRESSURE CONNECTION

1/2 [12.70]

1-43/64

[42.34]

15/64

[5.84]

OPTIONS

Use order add suffix: Description

-FC

-NIST

-SS

Factory calibration certificate

NIST traceable calibration certificate

304 brushed stainless steel bezel

Example: DHC-202-FC