Dwyer DH User Manual

Bulletin B-32

Series DH Digihelic®Differential Pressure Controller

Specifications - Installation and Operating Instructions

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, IN 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com

Phone: 219/879-8000 www.dwyer-inst.com

DIMENSIONS

3-19/32 [91.28]

4-1/2

[114.30]

1-3/4

[44.45]

1/2

4-1/2

[114.30]

[12.70]

Face Designed to Meet NEMA 4X (IP66)

PANEL CUT OUTS

Horizontal

3.620 in. + 0.032 - 0.0 (92.00 mm + 0.8 - 0.0)

1.772 in. + 0.024 - 0.0 (45.00 mm + 0.6 - 0.0)

1-15/16 [49.21]

3-25/32

[96.04]

1

SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Housing Material: ABS plastic, UL approved 94-V-0. Accuracy: ±0.5% at 77°F (25°C) including hysteresis and repeatability (after 1 hour

warm-up).

Stability: < ±1% per year. Pressure Limits: Ranges ≤ 2.5 in. w.c. = 2 psi

5˝: 5 psi; 10˝: 5 psi; 25˝: 5 psi; 50˝: 5 psi; 100˝: 9 psi.

Temperature Limits: 32 to 140°F (0 to 60°C). Compensated Temperature Limits: 32 to 140°F (0 to 60°C). Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C). Power Requirements:

High Voltage Power = 100 to 240 VAC, 50 to 400 Hz or 132 to 240 VDC. Low Voltage Power = 24 VDC ±20%.

Power Consumption:

Low Voltage Power = 24 VDC - 130 mA max. High Voltage Power = 100 to 240 VAC, 132 to 240 VDC - 7VA max.

Output Signal: 4-20 mA DC into 900 ohms max. Zero & Span Adjustments: Accessible via menus. Response Time: 250 ms (dampening set to 1). Display: 4 digit LCD 0.4˝ height LED indicators for set point and alarm status. Electrical Connections: Screw terminals. Process Connections: Compression fitting for use with 1/8˝ ID tubing x 1/4˝ OD

tubing (3.175 mm ID x 6.35 mm OD).

Enclosure Rating: Face designed to meet NEMA 4X (IP66). Mounting Orientation: Mount unit in horizontal plane. Size: 1/8 DIN. Panel Cutout: 1.772 x 3.620 in (45 x 92 mm). Weight: 14.4 oz (408 g). Serial Communications: Modbus® Protocol RTU, RS485, 9600 Baud. Agency Approvals: UL Listed, CUL Listed File No. E83725

CE EMC and Low Voltage Directives:

EN61000-4-2 EN61000-4-3* EN61000-4-4 EN61000-4-5 EN61000-4-6 EN61000-4-11 EN55011 EN601010

* Models DH-001 through DH-004, DH-011 through DH-014 pass criteria B. All others pass criteria A.

Switch SPECIFICATIONS Switch Type: 2 SPDT relays. Electrical Rating: 8 Amps at 240 VAC resistive. Set Point Adjustment: Adjustable via keypad on face.

2

WIRING

2020

1919

1818

1717

1616

1515

1414

1313

1111

1212

1010

9 8

7

6

5

4

3

2

1

21

2222

2323 2424

C

N/CN/C

N/ON/O

N/O

SP1 RELAY

SP2 OR ALARM RELAY

3/8A 250VAC MEDIUM LAG

100-240 VAC or 132-240 VDC POWER

NOTE1NOTE1

A

B

_

+

RS485 SERIAL COMMUNICATION

_

+

24 VDC POWER24 VDC POWER

REMOTE RESET SWITCH

NOTE 1

4-20mA transmitter output

Device receiving 4-20mA signal. Check specifications of this device for input load resistance. Typical 250 to 600 OHMS, 900 OHMS maximum

signal. Check specifications of this device for input load resistance. T 600 OHMS, 900 OHMS maximum

_

+

_

+

High Pressure PortHigh Pressure Port

Low Pressure Port

WIRING



NOTES:

WARNING

If Digihelic®is powered by 24 VDC, the device receiving the 4-20 mA transmitter output MUST NOT share a common ground with the 24 VDC supply or damage to the Digihelic®will result.

1. The instrument may be powered from the AC line or 24 VDC. Do not wire AC line terminals 4-5 and 24 VDC terminals 14-15 at the same time or damage to the unit will result.

2. For supply connections, wire in accordance with an equivalent national standard or code. Use copper conductors only rated for at least 75°C.

3. Terminals 11-15, 18 and 20 are rated CLASS 2.

4. ISOLATION:

Relays - 1500 VAC to all other inputs and outputs. AC Line Power (terminals 4-5) - 1500 VAC to all other inputs and outputs. RS485 output - 500 VAC to all other CLASS 2 wiring. The 24 VDC Power, 4-20 mA transmitter, and Remote Reset Switch share a common ground.

5. The Remote Reset Switch must be a dry contact switch.

6. Shielded cable is required for RS485 wiring.

3

It is not necessary to remove the control chassis from the housing for

20

19

18

17

16

15

14

13

12

10

9 8

7

6

543

2

1

21 22

23 24

20

19

18

17

16

15

14

13

12

10

9 8

7

6

543

2

1

21

22

23 24

20

19

18

17

16

15

14

13

12

10

9 8

7

6

543

2

1

21

22

23 24

_

+

SHIELD

TIE SHIELD TO EARTH GROUND

TO RS232 TO RS485 CONVERTER

120 OHM RESISTOR

LAST UNIT ON RS485 BUSS

WIRE NUT

THE 120 OHM RESISTOR IS USUALLY ONLY NECESSARY FOR LONG WIRE RUNS.

installation. If the control chassis is removed from the housing, you must follow industry standard practice for control and protection against Electro-Static Discharge (ESD). Failure to exercise good ESD

C

practices may cause damage to the control.

Wiring to housing terminals while chassis is removed may cause distortion of the internal connector and possible damage to the connector when the chassis is reinstalled. It is strongly recommended that



the control housing be wired with the chassis installed.

INSTALLATION

Mount the instrument in a location that will not be subject to excessive temperature, shock or vibration. All models are designed for mounting in an enclosed panel.

Select the position desired for the instrument on the panel. Prepare the panel by cutting and deburring the required opening.

From the front of the panel, slide the instrument through the cut out. The housing gasket should be against the housing flange before installing.

From the rear of the panel slide the mounting collar over the housing. Hold the housing with one hand and using the other hand, push the collar evenly against the panel until the springs are compressed. The ratchets will hold the mounting collar and housing in place.

DIGIHELIC® CONTROLER RS485 WIRING

- RS485 WIRING TO DAISY CHAIN INSTRUMENTS ON THE UP TO 128 UNITS MAY BE DAISY CHAINED

TO RS232 TO RS485 CONVERTER

10

23 24

19

16

17

18

TIE SHIELD TO EARTH GROUND

20

15

14

SHIELD

13

21 22

111112

WIRE NUT

10

23 24

19

20

18

RS485 BUSS

LAST UNIT ON RS485 BUSS

10

21

23

22

16

17

15

13

14

SHIELD

4

24

111112

19

20

16

17

15

18

THE 120 OHM RESISTOR IS USUALLY ONLY NECESSARY FOR LONG WIRE RUNS.

14

13

120 OHM RESISTOR

21 22

111112

SP1

SP2

ALHI

ALLO

SP/AL

RST

MENU

E

X1K

MULTIPLIER DESCRIPTOR

MULTIPLIER DESCRIPTOR VISIBLE WITH SO

ME VELOCITY

AND FLOW RANGE

FRONT PANEL

PRESSURE VALUE

UNITS

ALARM DESCRIPTOR

SP2 DESCRIPTOR

SP1 DESCRIPTOR

SP/ALSP/AL

SP/AL

MENUMENU

SP/AL

MENU

SP/AL

MENU

SP/AL

MENU

E

SP/AL

MENU

E

RSTRST

VISIBLE WITH S

ME VELOCITY

AND FLOW RANGE

SP1 DESCRIPTOR

SP2 DESCRIPTOR

FRONT PANEL

X1K

SP1

SP2

SP/AL

MENU

KEY FUNCTIONS

ALLO

ALHI

RST

PRESSURE VALUE

UNITS

ALARM DESCRIPTOR

HOME POSITION FUNCTION

Sequences the display

SP/AL

through SET POINT and

ALARM settings

Allows access to the

MENU

UP

ARROW

DOWN

ARROW

ENTER

RESET

Clears or resets an Alarm

(alarm set for manual

menus

Displays full scale

range of unit

reset)

MAIN MENU FUNCTION

Return to home

position

Return to home

position

Sequences through

menus

Sequences through

menus

Enter into SUB MENU

5

SUB MENU FUNCTION

Return to home position

Return to previous menu

Increments a value

Decrements a value

Changes a value or

setting. Press ENTER

and display will blink.

Adjust with UP or DOWN

arrows. Press ENTER to

store. Display will stop

blinking.

Peak/Valley SUB

MENU resets display to

present value.