101
External Control Lines
31
31 EXTERNAL CONTROL LINES
P2, the 20-pin connector at the rear of the main board, connects to the setpoint transistor
collectors and permits remote control of significant meter features.
The meter case label gives the names (abbreviated functions) of each of the twenty pins of P2,
the center-bottom connector. Refer to
Figure 30-1
.
Figure 30-1. Connector Label Detail
31.1 TARE (PIN 1)
Tare is available when P2-1 and P2-4 are connected to a momentary contact switch. This
feature allows you to automatically zero your meter when the switch is activated. Tare is not
available for temperature meters.
31.2 PEAK (PIN 2)
When this is connected to P2-4 by an external switch, the meter displays the stored PEAK
(
“
HI RDG
”
) value rather than the current reading. The display flashes to distinguish this value.
P2
TARE(T)
VALLEY (V)
EXT. RESET
DIG RTN
DISPLAY HOLD
NONSTANDARD TX
+V EXT
SP2
AL2
PEAK (P)
SWLIN2
N/C
+5V
LOCKOUT EEPROM &
MENU PUSH BUTTON
NONSTANDARD RX
N/C
SP1
AL1
RTN EXT
1
3
5
7
9
11
13
15
17
19
2
4
6
8
12
14
16
18
20
}
10
P2
RESET ALARM
Содержание DP41-B Series
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Страница 53: ...43 Input Type Menu Flowchart 11 11 INPUT TYPE MENU FLOWCHART INPUt...