SOMMAIRE
E 3
Device Presentation
The purpose of the RPS23 is to protect a load against DC over-current heating by the utilization of an inverse time cur-
rent characteristic. The device has a mV DC voltage input, ranging from 0 to 2000 mV over 2 calibers (0/250 mV &
0/2000 mV), automatically selected according to the configuration of the nominal voltage. To measure a current, an ex-
ternal shunt has to be used. The current measured and displayed is signed but the protection function is carried out on
the absolute value of the measurement.
The relay is entirely configurable via the front face keys and display. It can be equipped with 1 to 4 relays and 1 to 2
analog outputs. Relays 1 and 2 are affected to the thermal protection, relay 3 to nominal current overflow detection and
relay 4 is the watchdog relay. The watchdog relay is normally closed and LED R4 is off. When a default is detected
(internal measure error), the watchdog relay is open and LED R4 is ON.
In normal operation, the RPS23 displays the value of the measured current (see configuration). When a default is de-
tected, the device display the following messages:
- "
Err
" for sensor break or internal measure failure.
It is necessary to notice the differences between all the models:
RPS23
:
1 relay (thermal protection).
RPS23/R2
: 2 relays (thermal protection).
RPS23/R3
: 3 relays (idem R2 + nominal current overflow alarm).
RPS23/R4
: 4 relays (idem R3 + watchdog).
RPS23/S1
: 1 insulated analog output
RPS23/S2
: 2 insulated analog outputs, independently configurable.
The technical data sheet is downloadable here:
http://www.loreme.fr/fichtech/RPS23_eng.pdf
CONFIGURATION
Pressing the upper key permit to access the configuration.
For each rubric, a message is streaming on the display and the <YES> key permits to access the rubric and the <NO>
key to skip it. For a choice selection, the <YES> key validate the choice and the <NO> key invalidate it or pass to the
next choice.
During an adjustment procedure, the upper key increment the value and the lower key decrement the value and the re-
lay 1 LED is flashing. All the parameters are limited excepted the nominal current (LOW or HIGH is displayed on over-
flow). The adjustment procedure is terminated automatically after 4 seconds if no key is pressed.
The message "
OK !
" is displayed at the end of the configuration after all the parameters have been memorized.
If the configuration is stopped before the message "
OK !
" appears, the newly configured parameters are not saved.
Connector for relays 1 & 2,
outputs and power supply.
Power present LED.
4 digits display (current value)
Relay 1 alarm LED (thermal protection).
Relay 2 alarm LED (thermal protection).
Relay 3 alarm LED (nominal current).
Relay 4 alarm LED (watchdog).
Cover
Connector for voltage input &
relays 3, 4.
Configuration access
or
YES key
or
increment key (+)
NO key
or
decrement key (-)
RPS23
Stereo Jack for the RS232
link
