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S1AS: RS485 adapter for S1AX telemetry unit


Technical conditions in this datasheet apply to module S1AS module from SENTRY product portfolio. They determine the method of operation and other basic information.

Mechanické vyhotovenie S1AS

The transmitter is connected to the SENTRY communication system using a keyed connector with a connection nut. Both the module and the end sensor are powered via this connector. The plastic housing of the converter is made of ASA type plastic (modified ABS type plastic with resistance to UV radiation). In the cases of use in an environment with a potentially explosive atmosphere, the composition of the plastic is specifically adapted for use in this environment.

Technical data

Type of measurementany RS485 type sensor - typically supplied with liquid level sensor
Variationscommon or ATEX
Operation environment-20°C to + 60°C
Powering of modulefrom SENTRY S1AX module
Power requirements (from S1AX module)3 - 5.5V DC, max. 100mA
Uplink possibilitiesSee S1AX datasheet: Bluetooth, LoRaWAN, NB-IoT, Sigfox, WiFi, 802.15.4, ZigBee
Sensor connector typeHirschmann CA3GD
IP rating as per EN 60 529IP 65

ATEX parameters


These section parameters only apply if the device is manufactured in an intrinsically safe variation and has been issued with an appropriate declaration of conformity!

Output parameters:

Uo  =     6.6  V
Io  =     1.79 A
Co  =    10    μF
Lo  =   100    μH
Po  =     2.94 W

Environment temperature: -20°C ≤ Ta ≤ +60°C


Ordering codes table

Version (V)
V0ATEX Zone 2
VXspecial - on request
Sensor connection (C)
C1cable gland
CXspecial - on request
Operating temperature (W)
W0-20 to +60C
WXspecial - on request
Sensor power supply (P)
P05VDC 100mA
PXspecial - on request