9.
RF BOARD SCHEMATIC
DATAFLOW RTU
9.1
See the applicable RITRON DTX manual for the RF board schematic. When using a DTX manual in support of
the
DATAFLOW RTU,
only the RF portion is valid; disregard all references to the DTX control board.
10.
RF BOARD LAYOUT
10. 1
See the applicable RITRON DTX manual for the RF board layout. When using a DTX manual in support of the
DATAFWW RTU,
only the RF portion is valid; disregard all references to the DTX control board.
11.
INTERCONNECTS
CAUTION:
On
DATAFLOW RTU's
shipped before the 2
nd
quarter of 1998, do not exceed 6 volts referenced to GND
on RS-485 connections (the GREEN and BLUE wires of the External Power/Serial Cable: RITRON Part No.
06001123). Exceeding 6 volts will damage protection circuitry and render the unit's serial link inoperable.
11.1
For a weather-resistant aluminum enclosure for
DATAFLOW RTU,
purchase it in a small (S) enclosure option.
This option also provides bulkhead circular connectors and one UHF antenna port. See Figure A3 for pin
number designations of the circular connectors.
7-PIN
18-PIN
BULKHEAD CONNECTOR
KEYING PIN
KEYING PIN
0
0
0
0
0®©
©©@@
@@@®
@@@
Figure A3 - Circular connector pin designators
11.1.1 BULKHEADCONNECTORS:
COM>.'ECTOR
PlN
NAME
Ext. Power/ Serial:
1
A
2
B
3
GND
4
LDR
5
GND
6
VI
7
B+
( A-9)
CABLE CONNECTOR
KEYING SLOT
KEYING SLOT
0
©®0
@@©©
®@@@
@@@
0
0
0
DESCRIPTION
Serial Pair A
Serial Pair B
Loader Ground
Loader Connected/Program Enable
Power Ground
Power In to Controller and Radio
From Internal Battery
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