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 switch es
represent a binary logic to
calculate the MAC address.
Default = all OFF
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
T
B
7
IN
T
E
X
T
J
P
1
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
24 Vac 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
T
X
D
R
X
D
J
P
3
E
O
L
JP1
(TO1 / TO2 input voltage)
INT = 24Vac supplied internally by TB1
EXT = Apply 24Vac to pin 1 of TB2
T
B
1
T
B
4
T
B
5
P
o
w
e
r
2
COM
2
COM
3
1
24 Vac
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
24 Vac
2
COM
4
24 Vac
2
COM
M
A
S
T
E
R
S
L
A
V
E
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
