Neptronic EVCB14NIT4X/TRL24 Series, Specification And Installation Instructions

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Networkable VAV Controller
Specification and Installation Instructions
www.neptronic.com EVCB14NIT4X Page | 5
Wiring
We strongly recommend that all Neptronic products be wired to a separate grounded transformer and that transformer shall service
only Neptronic products. This precaution will prevent interference with, and/or possible damage to incompatible equipment.
DS1 DIP Switch
The 8 DIP switches
represent a binary logic to
calculate the MAC address.
Default = all OFF
JP3 (End of line)
None = No end of line
120 Ohms = Last node on network
TXD Flash
transmitting data via network
T
B
1
T
B
3
T
B
2
T
B
4
T
B
5
T
B
6
P
o
w
e
r
S
ta
tu
s
O
N
1
2
3
4
5
6
7
8
D
S
1
IN
T
E
X
T
T
B
7
J
P
2
IN
T
E
X
T
J
P
1
3
2
1
AI2
AI1
COM
2 analog inputs (config.)
External temp, changeover, normally cool/
heat, setpoint air flow, CO2, air supply temp
3
2
1
AO2
AO1
COM
2 analog outputs (config.)
Cool ramp 1 or 2, heat ramp 1 or 2, CO2,
setpoint airflow
3
2
1
DI2
DI1
COM
2 digital inputs (config.)
DI2: Override, normally cool/heat
DI1: OCC open/close, NSB open/close
3
2
1
COM
24Vac input
(TO2/TO1)
TO1
4
TO2
7
6
5
COM
24Vac input
(TO3/TO4)
TO3
8
TO4
4 TRIAC outputs (config.)
Cool 1 or 2, heat 1 or 2, CO2
On/Off (config close/open percent)
Floating (config float time)
Pulse (heat only)
Direct or reverse
3
2
1
24Vac
COM
4
24Vac
COM
Power Input/Output
24Vac
3
2
1
COM
A+ (in)
B- (in)
To other
BACnet
devices
High
Total Pressure
Low
Static Pressure
T
X
D
R
X
D
J
P
3
E
O
L
JP2 (TO3 / TO4 input voltage)
INT = 24Vac supplied internally by TB1
EXT = Apply 24Vac to pin 5 of TB2
JP1 (TO1 / TO2 input voltage)
INT = 24Vac supplied internally by TB1
EXT = Apply 24Vac to pin 1 of TB2
RXD Flash
receiving data via network
Power On
24Vac applied to TB1
Status Flash
communicating via thermostat
3
2
1
Data
COM
Pwr
5
4
A+ (out)
B- (out)
Mode Selector Jumper
RUN = Operation Mode
PGM = Programming Mode
BACnet
service port
Avoid touching the CO2 sensor as
this may cause incorrect readings
TB1
1
2
3
4
5
6
7
P
G
M
R
U
N
A
B
C
JP1
Data
Pwr
COM
Optional:
connect
to enable
service port
CO
2
sensor
(TRLG24 and TRLGH24 only)
Temperature sensor (all models)
Humidity sensor (TRLH24 and TRLGH24 only)