Specifications; Electrical; Hardware; Communication - Honeywell CENTRA LINE MERLIN N Series Manual

MERLIN NX IP AND MST/TP VAV CONTROLLER - INSTALLATION INSTRUCTIONS
CAUTION
CAUTION
Disconnect the power supply before installing the
MERLIN NX IP and MSTP VAV controllers. Do not
reconnect the power supply until you have completed
the installation.
Switch off the power before you plug / un-plug the
jumper.

SPECIFICATIONS

Electrical

Voltage Range: 20-30 VAC; Class 2 transformer
Nominal Power Consumption:
— : 8VA; Controller and actuator load (nothing
IP variant
connected to IO's and COM)
— : 6VA; Controller and actuator load (nothing
MSTP variant
connected to IO's and COM)
Full Load Power Consumption:
— : 30VA; Maximum load including external loads
IP variant
(including SYLK™, communication, BLE, UIO output,
20V output)
— : 22VA; Maximum load including external
MSTP variant
loads (including SYLK™, communication, BLE, UIO
output, 20V output)
— If SSR is used, it should consider real VA needed.
Frequency Range: 50 to 60Hz
Auxiliary Output: 20 VDC @ 75 mA

Hardware

CPU: Crossover processor NXP I.MRT, Cortex M7
Memory Capacity: 16MB QSPI Flash, 16MB SDRAM
Ethernet: 2 X RJ-45 Ethernet ports with integrated fail-
safe for daisy-chaining for IP variants.
Real Time Clock: 24-hr backup after power failure.
The controller includes a supercapacitor to power the built-
in real time clock for 24 hours. In case of power failure, the
super capacitor retains the time set in controller for 24
hours. After 24 hours, the time will reset to default factory
time until user perform BACnet Time Sync.

Communication

The controller is available either with BACnet IP or BACnet
MSTP as a backbone bus.
— Modbus RTU (Modbus Master only)
— Sylk™ Bus: 2-wire, polarity-insensitive
— Optional Bluetooth: BLE for using mobile balancing
application
BACnet IP (IP variants):
EN1Z-1076GE51 R1021
— : Dynamic: DHCP and LinkLocal, Static
Addressing
—
Connection Speed

Airflow Sensor

Range: ±2.0 in. H2O (±500 Pa)
Accuracy: ±3% of full range
Dimension (LXWXH): 175 X 154 X 90 mm (7 X 6 X 3 1/2
inch)
Weight: 1.5 Kg

Integrator Actuator

44 in-lbs (5 Nm)
Torque:
Floating 108 s at 50 Hz; Floating 90 s at 60 Hz
Run Time:
Round 5/16 – 5/8 in (8- 16 mm); Square 1/4
Mounting Shaft:
– 1/2 in (6-13 mm)
≥
1 5/8 in (41 mm).
Shaft Length:

Operational Environment

Storage: -40 °C to 66 °C (-40 °F to 150 °F)
Operation: 0 °C to 50 °C (32 °F to 122 °F)
Humidity: 5% to 95% RH., non-condensing
protection: IP20, NEMA -1
Pollution: Level 2
Sylk™ Devices Supported
Wall Modules Sensors: CLCMTR40, CLCMTR40-H,
CLCMTR40-H-CO2, CLCMTR40-CO2, CLCMTR42,
CLCMTR42-H, CLCMTR42-H-CO2, CLCMTR42-CO2,
CLCMTR71-H, CLCMTR120 (TR75E) and CLCMTR120-H
(TR75-HE)
UIO (Configurable as analog output or
universal input)
AO
— 0(2)...10V direct/reverse with -3mA ...+20mA (nega-
tive current needed for light dimming)
— Current output with 0(4)...20mA
UI
— 0(2) to 10V direct/reverse or 0(4) to 20 mA input
— : NTC10k(Type 2), NTC10K3, 10K3A1,
Sensors
NTC20k, PT100, PT1000, NI1000TK5000, NI1000
Class B DIN43760, PT3000, JOHNSON A99, 100
Ohm to 100k Ohm resistive (custom characteristic)
— Hardwired wall modules: set point, fan speed, occu-
pancy override
— Dry contact binary input with direct/reverse
— Counter (S0) with 100Hz (min. pulse width 5 ms; e.g.
used to measure fan speed)
— Internal use of UIO 1: resistive input for position
potentiometer providing a 0 to 100% linear position
signal
— Parameters: Resistive value for 0% and resistive
value for 100%; direct/reverse
4
: 10/100 Mbps