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CLASS 320 METER
6.9.2 External Modem
1. All meters should be connected to the RS-232 key as described in 6.8.2.
2. DISCONNECT POWER TO THE RS-232 KEY. Remove the cover by removing
the 2 screws from the bottom of the enclosure.
3. On the circuit board, locate the blue jumpers J7 (MODEM) and J8 (ex-MODEM).
If these jumpers are set in the DIRECT position, you must move the jumpers so
they are set in the MODEM position. Replace the cover and secure the enclo-
sure.
4. Connect the RS-232 key to the external modem using the supplied 8-conductor
flat modular cable.
5. Connect the 9VDC adapter to the power input on the back of the RS-232 key
and plug it into a 120VAC outlet.
IMPORTANT:
The modem should use a phone line that is dedicated exclusively to the AMR
system. Do not use a phone line that is shared by another modem or fax
machine.
6.9.3 Baud Rate Selection
The communication Baud rate on the Class 320 meter is set through positions 3 and 4
on DIP switch S2 on the meter circuit board. The default is 9600 Baud.
1. Select 9600 when using the Class 320 meter with a modem.
2. The Baud rate on the meter must always match the Baud rate selected in the
Honeywell Energy software; otherwise, communications will not function.
3. After a Baud change, press the CPU reset button to register the change.
4. All meters in the daisy-chain circuit must be set at the same Baud rate.
3
4
ON
ON
OFF
ON
ON
OFF
OFF OFF
62-0397-02
BAUD RATE
9600
19200
38400
76800
Fig. 17. Baud Rates.
28
BAUD RATE
SELECTION
SWITCHES
M33195
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