Honeywell W7750A specifications Inputs/Outputs, Analog Inputs

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware

Output

Roof Top Unit Controller number 8030

Inputs/Outputs:

The W7750A Unit supports the following hardware features:

•	Three 20 Kohm NTC (1000 through 150,000 ohm) or
	PT3000 (250 through 12,000 ohm) resistive analog inputs
	(one reserved for space temperature and one reserved for
	the setpoint knob).
•	Three dry contact digital inputs (one reserved for the

nv1

nviSpaceTemp

nv3

SNVT_temp_p Mandatory

Network

nviSetPointVariables

nvoSpaceTemp SNVT_ temp_p

nvoUnitStatus

Bypass pushbutton).

• LED digital output (only for the wall module LED) 2.5V at 3

mA.

nv2

SNVT_temp_p

nv4

SNVT_hvac_status

• Six 24 Vac relay digital outputs (1.5A relays rated at 7.5A

inrush current).

nv5

nv6

nv7

nviApplicMode	nv10
SNVT_hvac_mode

nviOccCmd

nv11

SNVT_occupancy

	Optional
nviSetPtOffset	Network	nv12
SNVT_ temp_p	Variables

nviOutsideTemp

nvoEffectSetPt SNVT_ temp_p

nvoOutsideTemp SNVT_ temp_p

nvoOutsideRH SNVT_ lev_percent

nvoCO2

The W7750B,C Units support the following hardware features:

• Four 20 Kohm NTC (1000 through 150,000 ohm) or

PT3000 (250 through 12,000 ohm) resistive analog inputs

(one reserved for space temperature and one reserved for

the setpoint knob).

• Two 0.2 to 10 VDC or 2 to 20 mA (user selectable) analog

inputs.

• Five dry contact digital inputs (one reserved for the Bypass

nv8

SNVT_ temp_p

nv16

SNVT_ppm

pushbutton).

• Eight on the W7750B (five on the W7750C) 24 Vac Triac

digital outputs (500 mA MAX). The W7750C Unit also

nv9

nv13

nv14

nv15

nviOutsideRH SNVT_lev_percent

nviSpaceRH SNVT_ lev_percent

nviCO2 SNVT_ppm

nviEmergCmd SNVT_hvac_emerg

	supports three 4 to 20 mA analog outputs.
•	LED digital output (only for the wall module LED, T7770
	models or LCD, T7560A,B) 2.5V at 3 mA.
•	One 20 Vdc power supply for auxiliary devices with a
	maximum current of 50 mA.

ANALOG INPUTS:

NOTE: Only one of each type of input is allowed. For example, only one Outdoor Air Temperature sensor is allowed. No duplicate Outdoor Air Temperature sensors are usable on the same controller.

Configuration Properties

nc49 - Send Heartbeat	(mandatory)
nc60 - Occupancy Temperature Setpoints (mandatory)
nc48 - Maximum Receive Time	(optional)
nc17 - Location	(optional)
nc42 - CO 2Limit	(mandatory)

Manufacturer

Defined

Section

Hardware

Input M11580

Fig. 9. Functional profile of LONMARK® RTU object details (variables not implemented in Excel 10 CVAHU

are greyed).

Environmental:

Operating Temperature: -40 to 150°F (-40 to 65.5°C).

Shipping Temperature:

-40 to 150°F (-40 to 65.5°C).

Relative Humidity:

5% to 95% noncondensing.

Vibration:

Rated V2 level compliant.

Space Temperature:

Type: RTD.

Supported Sensors: T7770A,B,C,D; T7560A,B.

Discharge Air Temperature:

Type: RTD.

Supported Sensors: C7100A1015*, C7770A1006, C7031B1033, C7031C1031, C7031D1062, C7031F1018 (W7750B,C only), C7031J1050, C7031K1017.

Outdoor Air Temperature:

Type: RTD.

Supported Sensors: C7170A1002.

Return Air Temperature:

Type: RTD.

Supported Sensors: C7100A1015*, C7770A1006, C7031B1033, C7031C1031, C7031D1062, C7031F1018 (W7750B,C only), C7031J1050, C7031K1017.

*The PT3000 sensor is not recommended for floating control (real time - discharge or return configured as space sensor). The PT3000 sensor is intended for monitoring or differential (staged) control

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