Honeywell P7640A, P7640B Installation Instructions Manual

62-0210-07

P7640A,B
Differential Pressure Sensors

INSTALLATION INSTRUCTIONS

APPLICATION

The P7640A Panel Mount and P7640B Duct Mount
Differential Pressure Sensors provide reliable, accurate
measurement and control. Proper applications include
measurement of extremely low pressure applications such
as: building/room pressure, air flow, variable air volume,
filter status, and duct pressure. They are ideal for clean
rooms, hospitals, fume hoods, and computer rooms.

The P7640 Pressure Sensors are designed with field­selectable 4-20 mA, 0-5 Vdc, or 0-10 Vdc output. The four
pressure ranges fall between 0–1 in. w.c./0–250 Pa or 0–
10 in. w.c./0–2500 Pa, depending on the model.

Accessory

32003169-001 Duct Pressure Pick-up Probe, 4 in.

INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazard­ous condition.

2. Check ratings given in instructions and on the
product to ensure the product is suitable for your
application.

3. Installer must be a trained, experienced service
technician.

4. After installation is complete, check out product
operation as provided in these instructions.

IMPORTANT

All wiring must agree with applicable codes,
ordinances and regulations.

Mounting

Screw holes are accessed inside the enclosure (with the
cover removed) and are located in the upper left and
lower right corners.

Panel Mount

Run tubing from one (static) or both (differential) barb
fittings, making sure the typically higher pressure source
is connected to the port labeled HI, and the typically
lower pressure source is connected to the port labeled
LO.

Duct Mount

The units with the integral probe should typically be
mounted at the high pressure location when used for
differential control.

CONFIGURATION

Select the proper output, mode, and pressure range
using the switches and jumpers:

1. Select output using the output switch:
a. Current: mA (then skip to step 3), or
b. Voltage: Volt.

2. Select 0-10 Vdc or 0-5 Vdc using jumper J4.

3. Select bi- or uni-directional mode using jumper J5.

NOTE: Setting for 0 to 1 in. w.c. and bi-directional

4. Select inches w.c. or Pascal scale using jumper J7.

5. Select fast or standard response time using jumper

J8.

6. Select appropriate full-scale pressure range using
the rotary switch. Align arrow (not the slot) to the
desired range. See Table 2 for the range selection
guide.

NOTE: Note that either the 1 in. w.c. or 10 in. w.c.

7. Set output according to Table 1.

Controller

W7750, W7760, W7761 4-20 mA FilterPress or

W7750B, W7760C,
W7753, W7760

Non-Honeywell 0-5 Vdc n/a

will give output from -1.0 to 1.0 in. w.c.

scale is marked. This is the available
scale for that given model. When the
range is changed, the LCD models
momentarily indicate selected range.

Table 1. Controller Compatibility

and Output Settings.

Required Sensor

Output Setting

0-10 Vdc (default) FilterPress or

L

P7610B

P7610F, or voltage

ONSPEC™

Setting

P7640A,B DIFFERENTIAL PRESSURE SENSORS

CAUTION

CAUTION

12 TO 30 Vdc
POWER SUPPLY

CONTROLLER,
METER OR
RECORDER

INPUT SIGNAL

COMMON

+

+

–

–

M27292

ZERO

PWR OUT COM ZERO

RESPONSE

FAST/STD

mA

VOLT

1

DRY CONTACT TO AUTOMATICALLY ZERO THE SENSOR
UPON CLOSURE. (OPTIONAL)

1

OUTPUT

JP8

UNITS

IN. W.C./PA

JP7

MODE
BI/UNI

JP5

VOLT

SV/10V

JP4

7

1

2

3

4

5

6

E

GND

OUT1OUT2OUT3OUT4OUT5OUT6OUT7OUT8DI1DI2DI3DI4GND GND

24
VAC
COM

24
VAC
COM

24

VAC24VAC24VAC24VAC24VAC

OUT
COM

21
VDC
OUT

GND E-BUS E-BUS

AI1AI

2

AI3AI

4

AI5AI

6

AI7AI

8

ANALOG

OUT

AO1AO

2

17 18 19 20 21 22 23 24 25 26 27 28 29

L1

(HOT)

L2

31 32 33 34 35 36 37 38 39 40 41 42 43

44

12345 678 9101112 14 1615

13

W7760A

AI

GND

AI

GND

AI

GND

AI

GND

AO

GND

+
–

O

P7640

+
–

O

P7640

+
–

O

H76XX

+
–

M18302B

Vin (Vac)

Gnd

Vo (0-10 Vdc)

PWR

COM

OUT

PWR

COM

OUT

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

TEMPERATURE SIGNAL CONNECTIONS ARE NOT POLARITY SENSITIVE.

1

1

2

2

WIRING (FIG. 1 THROUGH 3)

Equipment Damage Hazard.
Can damage the device beyond repair.

Disconnect power supply before installation.

NOTE: Wiring to the ZERO terminals is optional.

ZERO

RESPONSE

FAST/STD

JP8

1

2

VOLT

IN. W.C./PA

JP7

JP5

JP4

1

M27291

UNITS

SV/10V

2

MODE
BI/UNI

7

6

5

3

4

–

+

mA

OUTPUT

+

–

3

L1

L2

PWR OUT COM ZERO

CONTROLLER,
METER OR
RECORDER

INPUT SIGNAL

+

COMMON

–

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

1

PROTECTION AS REQUIRED.
POLARIZED SECONDARY INDICATIONS FOR USE WITH DC POWER

2

SUPPLY ONLY.

DRY CONTACT TO AUTOMATICALLY ZERO THE SENSOR UPON

3

CLOSURE. (OPTIONAL)

Fig. 1. Wiring for voltage (Vdc) output.

Equipment Damage Hazard.
Can damage the device beyond repair.

Do not apply power to output terminal. Permanent
equipment damage will result.

VOLT

Fig. 2. Wiring for current (mA) output.

62-0210—07 2

Fig. 3. Typical wiring for three-wire pressure sensor with Vdc output (used with the XL15A Controller).