S8 prod spec_ ny_1

S8 prod spec_ ny_1
aSENSE VAV MB
CO2 / temperature sensor with built-in general
purpose controller for wall mounting prepared
for Modbus communication protocol
Dismounting of the sensor
5
1
4
3
2
1 top part
2 lid
3 front part
4 wall plate
5 screw
6 label with settings
inside the top part
6
Pull the top part upwards
1
Push the front part with the lid upwards
while keeping the wall plate steady
Fold the front part with the lid forwards
and loose it from the hooks (#1)
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Mounting of the sensor
A
B
The wall plate is screwed onto the wall
(A) Put the top tabs of the front part into the top
The screw head diameter should be max 7,5 mm
holes of the wall plate.
The screw head height should be max 2,5 mm
(B) Press the lower edge of the case onto
the wall plate to latch
~
+
DI1
The top part is pushed under the
locking hooks of the wall plate
and is secured with a screw
Terminals and jumpers on aSENSE VAV with mounted.
RS-485 communication board. The darker positions are default
settings. Terminals and jumpers are located under the top part.
If for some reason the PCB must be removed it must be handed carefully
and protected from electrostatic discharge! Normally, removing the PCB is
not required.
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Electrical connections
+ and
The power supply has to be connected to ~
.
is considered as system
ground. The same ground reference has to be used for the aSENSE VAV unit and for
any connected device! Unless different transformers are used, special precautions
need to be taken.
PLEASE NOTE!
The signal ground is not galvanically separated from the
aSENSE VAV power supply!
NOTE! The same ground reference has to be
used for the aSENSE VAV unit and for any
connected device!
If possible keep the sensor powered up after mounting.
Connect the analogue output before measuring.
Connection
Terminal
Function
Electrical Data
Power (+)
24 VAC/DC+ (+-20%), 3W
Out(1)
Power ground (-)
Analogue Output 1 (+)
24 VAC/DC0-10 VDC or 0-20 mA,
2-10 VDC or 4-20 mA,
Out(2)
Analogue Output 2 (+)
Same as Output 1
According to positions of
Out(2) jumper and start point
selection. See note 2!
5
6
Signal Ground (-)
Connected to G0 via PTC fuse
Contact free relay
minimum load 1mA/5V
rated load 0,5A/125VAC;
1A/24VDC
0-10 VDC
See note 1!
Triggered by register Out(3)
+
~
Normally open relay
7
8
Out(4)
Analogue Output 4 (+)
or Open Collector
DI1
Digital Input 1
Remarks
2W without output load
See note 1!
According to positions of
Out(1) jumper and start point
selection. See note 2!
Max 0,5A, 55VDC / 40VAC
(half-wave rectifier protection)
Closed contact current 1mA
Open contact voltage max 5V
According to positions of
Out(4).
See note 2 & 3!
Do not apply any voltage on
this input!
Note 1: The ground terminal is used as negative power supply DC input or AC phase ground
(halfwave rectifier). The signal ground M, protected by a PTC resistor, is the same as power ground
(permitting a ”3-wire” configuration). A single transformer may be used for the entire system.
Note 2: aSENSE VAV can deliver both a voltage or a current loop for Out(1) / Out(2). For Out(4) a
voltage output or an open collector output is selected with jumper OUT4. To change between voltage
and current output mode the hardware jumpers are used. There is one jumper for Out(1) and one for
Out(2), so that one output can be a voltage output and the other a current output. Both, voltage and
current output, can have start points 0 % (0-10 VDC or 0-20mA) or 20% (2-10 VDC or 4-20mA)
selected from PC software.
Note 3: Current of Open Collector is internally returned to
terminal.
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Network Adapter for Connection to RS-485-Network
The network adapter to RS-485-network is mounted on the PCB. The green LED
flashes every time the adapter answers calls from the network master.
RS485
LED
A
B
RS485 GND
UART
The adapter is put on the UART connector with all five pins connected. All five
pins of the UART must be connected. The adapter should be mounted with the RS485 terminal facing the other terminals and the LED facing the display.
Dimensions and holes
31(1,22)
83(3,26)
30(1,18)
30(1,18)
30(1,18)
25(0,98)
120(4,72)
52,5(2,07)
2(0,08)
7,8(0,31)
29,8(1,17)
4,2(0,16)
Mounting of the sensor onto
the wall
Please use screws with screw
head diameter less than 7,5
mm (0,295 inches) and screw
head height less than 2,5
mm (0,1 inches)
®
SenseAir AB (headquarter)
Stationsgatan 12
Box 96
820 60 Delsbo
SWEDEN
Phone: +46-(0)653 - 71 77 70
E-mail: info@senseair.com
Web site: www.senseair.com
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IMA 159
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