Omega DP41-B Series, Руководство пользователя

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31.3 VALLEY (PIN 3)
When this is connected to P2-4 by an external switch, the meter displays the stored valley
( “ LO RDG ” ) value rather than the current reading. The display flashes to distinguish this value.
31.4 SWLIN2 (PIN 4)
Completes the circuit for any of the above three signals.
31.5 EXTERNAL RESET (PIN 5)
Connecting this to ground (P2-7) causes a “ HARD ” RESET (when you see “ RESET2 ” on the
display).
31.6 NO CONNECTION (PIN 6)
31.7 DIGITAL RETURN (PIN 7)
This is a non-isolated return to be used for the digital controls provided on this P2 connector.
WARNING: THIS METER RETURN IS NOT ISOLATED FROM THE SIGNAL INPUT
AND SHOULD NOT BE CONNECTED TO EXTERNALLY-GROUNDED DEVICES
UNLESS ISOLATION IS PROVIDED EITHER AT THE SIGNAL INPUT OR AT THIS
EXTERNAL-LOGIC CON NEC TION.
31.8 +5 V (PIN 8)
Up to 20 mA is available for driving external devices, but isolation should be provided if there is a
possibility of common mode (ground) currents, since this supply is NOT isolated from the signal
input.
31.9 DISPLAY HOLD (PIN 9)
Grounding this pin to P2-7 freezes the display value. However, the meter continues to take new
samples and update the other outputs, such as Analog Output, Setpoints/Alarms, and
Peak/Valley.
31.10 LOCKOUT EEPROM (AND ‘MENU’ BUTTON) (PIN 10)
Grounding this pin to P2-7 stops any configuration changes and new storage into the non-volatile
memory, and when in run mode does not allow entry into the setup mode when the ‘ MENU ’
button is pressed. This function is available if unit is set for “Menu 2” mode. If “Menu 1” mode is
selected, use Lockout via ID codes, see Section 29 (Lockout Configuration). For more details on
Menu Modes see Section 1.4 (Modes of Operation ) and Section 4.1 (Parts of the Meter, Menu
Button Function in Configuration Mode).
31.11 RESET OF ALARMS (PIN 11)
Grounding this pin to P2-7 causes the alarm latches to reset.
31
External Control Lines
102