Neptronic EVCB14NIT4X/TRL24 Series Specification And Installation Instructions

Models
EVCB14NIT4X
(4 TRIACS / independent / external motor)

For use with external floating or modulating actuators
TRL24
(Thermostat 2x4)
TRLH24
(Thermostat 2x4 with Humidity)
TRLG24
(Thermostat 2x4 with CO2)
TRLGH24
(Thermostat 2x4 with CO2 and Humidity)
Description
The EVCB Series is a combination controller and thermostat with
support for networked communications via the BACnet MS/TP or
Modbus protocol. The Networkable VAV Controller is designed for
simple and accurate control of any variable air volume box in a
number of zone control configurations. Its field configurable
algorithms enable versatile implementation of required control
sequences.
Features

Field configured VAV algorithms, inputs and outputs

Control external actuators using analog (0-10Vdc, adjustable)
or floating signals with feedback

On board differential pressure sensor

Select direction on analog outputs

Simple air balancing and commissioning via thermostat

Configurable PI (Proportional-Integral) function

Independent, configurable proportional control band and dead
band per ramp

Activate output with CO

Selectable internal or external temperature sensor (10KΩ)

Changeover by contact or external temperature sensor

Internal and external temperature sensor calibration

Freeze protection

Removable, raising clamp, non-strip terminals
Operational Features

Backlit LCD with simple icon and text driven menus

Select thermostat's default display

Network service port via on-board mini USB connector

Manual night set back or no occupancy override

Multi level lockable access menu and setpoint

Selectable Fahrenheit or Celsius scale

3-wire connection to controller and 4 push buttons
Controller Specifications
Description
Power consumption
Power supply
Inputs
On-board differential pressure sensor
Outputs
Real Time Clock
BACnet
Modbus
Communication connection
Electrical connection
Operating temperature
Storage temperature
Relative Humidity
Weight
EVCB14NIT4X-TRL24-V411-170525-ESA.docx
sensor from TRL or external input
2
10 VA max
22 to 26 Vac 50/60 Hz
2 Universal inputs (Thermistor 10KΩ Type 3, digital 24Vac/dry contact, or 0-10Vdc)
2 digital inputs
0-1.0" WC
2 analog outputs (0-10 Vdc or 2-10Vdc; selectable)
4 TRIAC outputs 24 Vac, 500mA max thermal fuse in series with each TRIAC output (on/off, pulse, or 2
floating outputs)
Real-time clock (RTC) with super capacitor backup (approximately 3 days)
®
BACnet MS/TP @ 9600, 19200, 38400 or 76800 bps (BAS-C)
Modbus RTU slave @ 9600, 19200, 38400 or 57600. Selectable parity and stop bit configuration:
No parity, 2 stop bit | Even parity, 1 stop bit | Odd parity, 1 stop bit
24 AWG twisted-shield cable (Belden 9841 or equivalent). Max 0ft (15m) between controller and thermostat
2
0.8 mm [18 AWG] minimum
0ºC to 50ºC [32ºF to 122ºF]
-30ºC to 50ºC [-22ºF to 122ºF]
5 to 95% non condensing
1.8 kg. [4 lb]
Networkable VAV Controller
Specification and Installation Instructions
EVCB14NIT4X / TRL24 Series
Network Communication

BACnet MS/TP or Modbus communication port

Select MAC address via DIP switch or via network

Automatic baud rate detection
BACnet MS/TP®

Automatic device instance configuration

Copy & broadcast configuration via thermostat menu or
via BACnet to other controllers

BACnet scheduler

Firmware upgradeable via BACnet

Support COV (change of value)
Modbus

Modbus @ 9600, 19200, 38400 or 57600 bps

RTU Slave, 8 bits (configurable parity and stop bits)

Connects to any Modbus master
EVCB14NIT4X
EVCB14NIT4X Page | 1