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S81-MOD-AI020: 4-20mA input adressable module

Description This module allows monitoring of 4-20mA type analog signals. It is provided with two extractable terminal boards. One is a 5-pole terminal for connecting the communication bus and one is an 8-pole terminal for connecting the feeder and the transductor. There are 4 LEDs installed on the front part of the module performing the following functions: Led Polling: It starts blinking whenever the control card interrogates. Led Prealarm: It lights up when input tension exceeds the pre-alarm threshold. Led Alarm: It lights up when input tension exceeds the alarm threshold. Led Fault: It lights up when input tension is lower than 3mA. For each analog module of the S81-Mod-AI020 type two alarm thresholds can be programmed on the monitoring central with the following measurement ranges:

Measurement ranges

Pre-Alarm Threshold

Alarm Threshold

Measurement ranges

Pre-Alarm Threshold

Alarm Threshold

0-255 Bit 0-255 0-255 0-999 ppm 0-999 0-999 0-10 ppm 0.0-10.0 0.0-10.0 0-100 %LEL 0-100 0-100 0-20 ppm 0.0-20.0 0.0-20.0 0-25 %O2 0.0-25.0 0.0-25.0 0-50 ppm 0.0-50.0 0.0-50.0 15-25 %O2 15.0-25.0 15.0-25.0 0-100 ppm 0-100 0-100 4-20 mA 4.0-20.0 4.0-20.0 0-200 ppm 0-200 0-200 0-100 C 0-100 0-100 0-500 ppm 0-500 0-500 0-150 C 0-150 0-150

Mechanical dimensions

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Assembling The module is to be assembled onto a DIN bar inside a cabinet or inside a junction box provided with mechanical protection which fits the assembling environment. Do not install the module outdoor.

Address programming For proper functioning it is necessary to give to the module an address included between 1 and 127 by using the relative programmer. To set the address, follow these directions: - Connect the extractable 5-pole terminal of the programmer to the module to be programmed. - Press the left grey key on the programmer. The 3-digit display will show the module address. - Set the required address by pressing the two grey keys. - Press the red key to start the address programming. - Press the right grey key on the programmer to turn it off. - Disconnect the programmer from the module. - With a permanent marker write the programmed address on the white label which is present on the module.

Electrical connections

Technical features Container material Thermoplastics, green Protection class IP 30 Operating temperature -10 +55C Feeding Loop tension 17-41Vdc Loop absorption in stand-by 250uA typical Loop absorption in polling 22mA typical Feeding voltage 24Vdc 22-28Vdc Max output tension V Sens. 500mA Resolution 62,5uA (8 bit) Linearity +/- 1LSB Input impedance 47 ohm Compatible control cards S81-F7007-1