DPM1 User Manual, 1st Edition
User Manual - DPM1 Series Panel Meters
20
Output Options
All output are optoisolated with respect to input signal and power supply.
Relay Configuration
Introduction
All DPM1 models with -2R option are equipped with 2 relays that can provide individual
alarm and control capabilities. Each relay can be configured to function based on independent
setpoint values within the full configured display range, time delay (in seconds), hysteresis (in
counts of display) and selectable HI/LO acting.
Description of Operation
The relay outputs activate when the display value reaches the corresponding programmed relay
setpoint value. The following relay operational parameters must also be set:
a.
HI/ LO ACTING MODE.
In HI mode, the output activates when the display value exceeds the setpoint level and in LO
mode, the output activates when the display value falls below the setpoint
b.
PROGRAMMABLE TIME DELAY or HYSTERESIS.
Each output action can be deferred by a programmable time delay or hysteresis level.
The time delay is the time that takes the output to activate after passing through the setpoint in
the up or down direction, while the hysteresis band will be selected asymmetrical i.e. only acts
on the output deactivation edge. The delay is programmable in seconds, from 0 to 99.
The hysteresis can be programmed, in counts, within the full display range. The decimal point
appears in the same position as programmed in the display configuration module.
The figures 1 and 2 show the time delay action (dly) and the hysteresis action (hys) of two
alarms (SET1 and SET2) programmed to activate in HI mode (OUT1) and LO mode (OUT2)
Delay action
Asymmetrical hysteresis
dly
dly
dly
dly
