DPM3 User Manual, 1st Edition
User Manual - DPM3 Series Panel Meters
23
Direct Access to Relay Setpoints
If the DPM3 has relay outputs present the meter allows direct access to the programming of
the setpoint values. After accessing programming mode,
Pro
, pressing the
UP
key provides
access to each relay setpoint value.
Logic functions
The connector CN3 provides 3 optocoupled inputs that can be operated from external switches.
Three different functions may be assigned to the inputs using the front panel keys. Each
function is associated to a pin (PIN 2, PIN 3 or PIN 4) that is activated by applying an external
switch closure with respect to PIN 1 or COMMON. Function assignments to the inputs are
achieved through the programming of a number between 0 and 15 corresponding to one of the
functions listed in the following table.
Factory configuration
As shipped from the factory, the CN3 connector allows remote control of the TARE, RESET
TARE functions as well as the HOLD function.When a HOLD is made, the display value
remains frozen while the corresponding pin is activated. The HOLD state affects neither the
meter internal operation nor the analog and relay outputs if present.
Logic functions diagram
1 2 3 4
1 2 3 4
CN3
1 2 3 4
PIN (INPUT) Factor Default
Functions
Function
PIN 1
COMMON
PIN 2 (INP-1)
TARE
Function No. 1
PIN 3 (INP-2)
RESET TARE
Function No. 2
PIN 4 (INP-3)
HOLD
Function No. 6
The external electronics applied to the CN3 connector inputs must be capable of withstanding
a potential of 40V / 20 mA present at all terminals with respect to COMMON. In order to
guarantee the electromagnetic compatibility please refer to the connection instructions in the
Wiring Terminal section.
