Kewaunee Air Alert 600, Installation And Operating Manual

Page: 46 / 48

46
Connection Diagram with RS232/485 converter
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
SM6 AIRFLOW
SENSOR
RJ11 PLUG IN
CABLE (2M / 6’)
AFA1000/ E VAV CONTROLLER
4 PIN
PLUG IN CABLE
(2M / 6’)
GND
(A)+
(B)-
+VE
RS485 Coms
Connector
14 WAY RIBBON
CABLE
TO
RELAY INTERFACE
UNIT
4 Pin Male
Coms connector
on AFA1000
4 Pin Female
connector from
Coms Adaptor
Push Fit
A B elden 9842 ( Two pair )
cable with a characteristic
impedance o f 120 ohms is
recommended.
USB
PO RT
SW ITCH
BANK
SERIAL
PO RT
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
on the adaptor and
GND on the converter
1
2
When using a screened twisted pair (STP ) cable connect the
drain wire to GND on the coms adaptor.
Braid or foil
RxD
TxD
PW R
1 2 3 4 5 6
GND
(A)+
(B)-
+VE
RS485 Coms
Connector
TO PC
USB PORT
EAS YS YNC ES -U-2101-M
RS 485/232 Converter
ON 1 2 3 4
SET SW 1 & 2 OFF
SET SW 3 & 4 ON
2M flying lead to
AFA1000