SD 12x sensors intelligent temperature sensors provided by a measuring stem and a connection head

The sensors of the serie SD 12x are intelligent microprocessor-controlled temperature sensors. They were developed in cooperation with the company MIKROKLIMA. They consist of a sensing element in a stainless steel (class EN X5CrNi18-10, DIN 1.4301) stem and of printed circuit boards encased in a plastic connection head which is provided with a cable outlet bushing. The sensors meet the IP65 ingress protection requirements according to the EN 60 529 standard. The standard temperature range in which the sensors are allowed to be utilised is -40 to 150 °C. They are available in three basic variants:

1. SD 120 - with a simple AscII communication protocol consistent with ADAM 4000 modules by ADVANTECH company. Thus, standard drivers for ADAM modules can be used in various control programmes. For easier operation, a green LED indicates power supply and a red LED indicates that the module is communicating. The SD 1x0 module is provided by the INIT shorting jumper on its printed circuit board. If it is shorted when power is switched on, the module communicates on 00 address with 9600 Bd transfer speed without checksum.

2. SD 121 - the command structure complies with the ARION communication protocol, which is used in control systems by Amit company.

3. SD 122 - the command structure complies with the ModBus communication protocol.

These sensors are intended for contact measurements of liquid or gaseous substances. They are available with a plastic centric holder for temperature measuring in air-conditioning shafts or with a thermowell for measuring in tubing. The sensors are to be operated in chemically non-aggressive environment.

Communication inputs are protected to overvoltage. In case the module is placed as terminal on the line, a terminating resistor can be attached to the wiring by shorting the contacts (the switch SW next to the terminal for communication lines connection). All settings are stored in EEPROM memory. The electronic module is equipped with the WATCHDOG circuit, which safeguards proper program functioning in the microprocessor.

SD 12x sensors - prospectus