User manual

UNIVERSAL SENSOR SWITCHING MODULE
Instruction manual Page 3
Released 09/2006 Rights reserved for change in technical data! HYGROSENS INSTRUMENTS GmbH Postfach 1054 D-79839 Löffingen Tel: [phone] Fax: [phone]
2 Description
2.1 Functional description
The universal sensor-switching module is suitable as a two-point regulator for a wide
variety of sensors and industrial probes. A suitable sensor is connected at the input for
sensing the parameter which is to be regulated. The relay mounted on the PCB gets
triggered as per limit settings done through a potentiometer.
For universal application, the device is provided with three different type of inputs,
which are internally connected and can be used individually or together:
 Input 1: A Schmitt-trigger input with high pass filter for switching sensors like
Reed-contacts, alarm-circuits, pushbuttons, light barriers, message contacts or
motion alarm unit. Switch contacts, Open-collector outputs or sensors with binary
voltage output 0/5V can also be connected at the input.
 Input 2: An AC-input for analog AC voltage impedance evaluation. This input is
specifically meant for electrolytic sensors like conductance probes and level
indicators, humidity and dew formation sensors or water/leakage probes.
 Input 3: An universal, analog voltage or resistance input and also for industrial
voltage and current signals (0..1V/5V/10V, 0..20mA, etc.). This is also suitable for
direct connection of resistive sensors like LDRs, NTCs or PTCs.
The three inputs can be used either separately or in combined form (i.e. internally
wired or joined). The switching behaviour (active relay with upper and lower limits) of
each input can be separately configured with its relevant jumper connection.
The three inputs are brought out through the RJ12 socket, to which standard probes,
which are available as accessories can be connected or joined through soldering
without much expenses. The voltage and resistance input (Input 3) is also additionally
brought out through a 3-pin terminal strip.
In addition, the device is provided with a time delay switch, which can be configured
over a wide range (approx. 10 sec to 10 min). It is digitally configured with the help of
a jumper connection.
The adjustment of limiting values and Hysteresis is done with three potentiometers.
The condition of device is displayed with a total of 6 LEDs.
The high rating relay has a changeover contact. The NO contact of the relay can
switch a load up to 230V/5A and is provided with a varistor for surge suppression.
Scope of supply
The scope of supply is without probe. Standard probes are available as accessories.
The scope of supply of 12V/24V model is in the form of a PCB of size 95 x 75 mm
without housing and operating panel.
The 230V model is supplied in a housing (100 x 100 x 60 mm) with integrated power
supply unit and operating panel.