Loop Leader PD6620 Series Loop-Powered Rate/Totalizer Instruction Manual
14
Safe Area Current Loop (4-20 mA) Connections
Signal connections are made to a six-terminal connector labeled SIGNAL on Figure 4. The following fig-
ures show a 4-20 mA current loop connected to the meter. The first figure shows the connection without
the backlight and the second shows the connection with the backlight (the backlight may also be disa-
bled/enabled in the
SYSTEM
menu). The meter is powered by the 4-20 mA current loop.
There are no switches or jumpers to set up for the input. Setup and programming is performed through
the front panel buttons or PC-based software.
Figure 5. 4-20 mA Input Connection without Backlight
Figure 6. 4-20 mA Input Connection with Backlight
The current input is protected against current overload up to 1 amp. The display may or may not show a
fault condition depending on the nature of the overload.
Safe Area Digital Input Connection
A digital input is standard on the meter. This digital input is connected with a normally open contact
across DI+ and DI-, or with an active low signal applied to DI+ and DI-.
Figure 7. Digital Input Connections
DI+ DI- mA- mA+
BL-
X
DI+ DI- mA- mA+
BL-
X
DI+ DI- mA- mA+
BL-
X
