Power Pack for Measuring Transducers, HART, Ex/NEx

The SINEAX B812 unit supplies all commercially available 2-wire field transmitters.

The B812 unit supplies 2-wire transmitters and provides the 4 - 20 mA signal galvanicly separated at the output. The separation is HART penetrable, i.e. you can parameterise or read out intelligent transmitters via HART or customised protocols. Two power supply versions with wide area power packs ensure the connection to all common power supplies.

 It is one of the smallest products on the market. Nevertheless, we did not make any compromise in relation to safety. The unit embodies galvanic isolation between all circuits and complies with the whole range of EN 61 010 or IEC 1010 requirements. The intrinsically safe design connects to all field instruments in explosive gas or dust atmospheres (Zones 0, 1, 2 or 20, 21, 22).

  • The narrow design facilitates high packing density
  • Wide area power packs permit worldwide application
  • HART communication for intelligent transmitters without any surcharge
  • Monitoring of input circuit and indication of errors
Input Supply voltage at 20mA 18V
No-load voltage 26 V
Short-circuit current 25 mA
Signal 4 ... 20 mA
Short-circuit/breakage monitoring with LED
Output Signal 4 ... 20 mA
Load 750 Ω

Power Supply  low 20... 70 V AC/DC
high 50... 265 V AC/DC
high Ex 50... 125 VDC / 265 VAC
Ex Protection Type of protection EEx ia] IIC Ex II (1) GD
Uo: 28 V, Io: 93 mA, Po: 651 mW
Mechanics Dimensions LxWxH 114 x 17,5 x 69,2 mm
  Flammability class UL 94 V0
  Ambient temperature   -20... +55 ºC


  Article No: 812-
Icon Technical Data » GB (pdf 163 kB)
Icon Operating Instructions » GB (pdf 114 kB)
Pamphlet (pdf 322 kB)
EX Certificate (pdf 106 kB)
CE Certificate (pdf 56 kB)