Kewaunee Air Alert 600, Installation And Operating Manual

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8.1 Overview and connections
The AFA1000 series has on board RS485 coms with 3 protocols:-
Protocol Description
TEL Protocol for connection to TEL Configure Manager PC software and room controls
Modbus Modbus RTU protocol
BACnet BACnet MS/TP protocol (To connect to BACnet IP a 3 rd party router is required)
See separate coms registers for further technical, compliance and register information:-
AFA1000/1 Modbus Registers
AFA1000/1 BACnet Registers
Typical connection diagram
REFER TO
INSTALLA TION
INSTRUCTIONS
BEF ORE
CONNECTING
www.tel-uk.com
Made in England
TEL
I/P
1
I/P
3
I/P
2
-
b l
sw
b k
+
b n
sw
+
sw
+
+
- 1 5 V
PSU
I/P
-
+ 0 -1 0 V
O/P
1
R1
R2
R3
RJ11 PLUG IN
CABLE (2M / 6’)
AA600 AIRFLOW MONITOR
BMS
Modbus RTU or
BACnet MS/TP
RS 485 coms
4 PIN
PLUG IN CABLE
(2M / 6’)
GND
(A)+
(B)-
+VE
RS485 Coms
Connector
4 Pin Male
Coms connector
on AFA1000
4 Pin Female
connector from
Coms Adaptor
Push Fit
120 ohm 1/4W
end of line resistor
GND
(A)+
(B)-
+VE
RS485 Coms
Connector
from other
AFA1000
GND
(A)+
(B)-
+VE
RS485 Coms
Connector
from other
AFA1000
A Belden 9842 ( Two pair ) cable with a characteristic
impedance of 120 ohms is r ecom m ended. The ca ble
should be terminated with a 120 ohm ¼ Watt resistor as
shown.
A daisy chain connection should be used — a “Star” or
network with “Stubs” (Tees) is not recommended as
reflections within the cable may result in data corruption.
E
Screen
GND
(A)+
(B)-
+VE
Use twisted pair 2 for
the A & B connections
Use twisted pair 1 for
the GND connection
connect the drain wire
to GND terminal
1
2
When using a screened twisted pair (STP) cable connect the
drain wire to GND on the coms adaptor and to a suitable
Earth connection at the BMS end.
Braid or foil
SM6 In Li ne
Airflow Sensor