Neptronic EVCBM14NIT2S - Page 6

Networkable Dual Duct VAV Controller
Specification and Installation Instructions
www.neptronic.com EVCBM – Dual Duct Page | 6
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
TB1 TB3TB2 TB4 TB5 TB6
Power
Status
ON
1 2 3 4 5 6 7 8
DS1
TB7
INT EXT
JP1
Optional: connect
to enable service port
3 2
AI2
COM
1 analog input – (AI2 config.)
External temp, normally cool/heat, setpoint
air flow, CO
2
, air supply temp
3 2
AO2
COM
1 analog output (AO2 config.)
Cool ramp 1 or 2, heat ramp 1 or 2, CO
2
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
2 TRIAC outputs (config.)
Cool 1 or 2, heat 1 or 2, CO
2
On/Off (config close/open percent)
Floating (config float time)
Pulse (heat only)
Direct or reverse
3 2
1
Data
COM
Pwr
3 2 1
COM
A+ (in)
B- (in)
5 4
A+ (out)
B- (out)
To other
BACnet
devices
High Total Pressure
Low Static Pressure
TXD
RXD
JP3 EOL
JP1 (TO1 / TO2 input voltage)
INT = 24Vac supplied internally by TB1
EXT = Apply 24Vac to pin 1 of TB2
TB1 TB4 TB5
Power
2
COM
2
COM
3 1
24Vac
COM
Power Input
24Vac
Power On = 24Vac applied to
TB1
EVCBM14NIT2S
(Master)
EVCS14N
(Slave)
3
AO2
1
AI1
1
AO1
1
AI1
XFO
Line
Voltage
L
N
24Vac
3
24Vac
1
COM
4
24Vac
2
COM
4
24Vac
2
COM
MASTER
SLAVE
TB1
Data
COM
Pwr
Important:
Use the same transformer for
both the Master and Slave.
JP3 (End of line)
None = No end of line
120 Ohms = Last node on network
TXD Flash
transmitting data via network
RXD Flash
receiving data via network
Power On
24Vac applied to TB1
Status Flash
communicating via thermostat
TRL24 and TDU
1
2
3
4
5
6
7