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2. FEATURES
2.6
RS–232 Communication Options,
continued
Desktop IID RS–232 Port
The RS–232 port on the desktop IID can be used for access with a PC or
a network server. This port is not standard and the cable connecting the computer
or terminal to the UPS is a non standard type.
Communication Settings
with IID:
Baud Rate:
300 to 9600
Parity:
None, Even, or Odd
Stop Bits:
1 or 2
Data Bits:
7 or 8
Handshaking: RTS/CTS
External IID connections
1
2 Rx
3 Tx
4
5 Gnd
6
7 RTS
8 CTS
9
RS–232 cable to computer or terminal
For the desktop IID use a nonstandard
cable type
1
2 - RxD
3 - TxD
4
5 - GND
6
7 - RTS
8 - CTS
9
1
RxD - 2
TxD - 3
4
GND - 5
6
CTS - 7
RTS - 8
9
To IBM-PC
Serial Port
To Desktop IID
Serial Port
DE-9
Male
DE-9 Female (DTE)
Fig. 11: RS–232 Connector Cable Wiring
(Desktop IID to computer or terminal)
56
“MAINTENANCE PARAMETERS” allow you to customize UPS
detection and warning characteristics. Normally, there should be no
need to change these factory settings.
CAUTION: If any of these parameters are changed, it is vital to thoroughly
test the UPS since an improper adjustment can render the unit useless.
Since each parameter is viewed through reference numbers (1 - 16) and
translated into a scale of “reasonable” adjustments, an increase or
decrease of 2 - 3 reference numbers will have a noticeable affect. If you
have questions, contact Alpha prior to making any adjustment.
Fast Detect Lo Ref
Increasing this value will make the UPS more sensitive to a
fast, low amplitude line disturbance (glitch).
Fast Detect Hi Ref
Increasing this value will make the UPS more sensitive to a
fast, high amplitude line disturbance (spike).
Medium Detect Lo Ref
Increasing this value will make the UPS more sensitive to a
slow, low amplitude line disturbance (sag).
Medium Detect Hi Ref
Increasing this value will make the UPS more sensitive to a
slow, high amplitude line disturbance (surge).
Slow Detect Lo Ref
Increasing this value will make the UPS more sensitive to a
slow, low amplitude line disturbance (brownout) by raising the brownout
detection level.
NOTE: The Slow Detect Hys Lo Ref should also be adjusted by the
same amount.
5. RS-232 TERMINAL COMMUNICATION
5.11 Maintenance Parameters
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