LACROIX Sofrel S4W - S4 W Analog Input (4-20 mA) Configuration; Analog Input Connection; Analog Input Technical Specs

Case - Inputs/Outputs
Connection of AIs (4-20mA)
Only sensors with floating output delivering a current source free from any reference with respect to Ground and, in all cases, several
sources having no common point between them, are directly compatible with our materials.
Otherwise, the installer must provide a galvanic isolation device in the ‘RTU – Sensor’ link.
Installation of surge arresters:
All SOFREL sensors come with inbuilt surge protection. However, if the ‘RTU –
Sensor’ link cable runs
outside of building or extends a significant length (> 200 metres), a 4-20 mA surge arrester should
be installed on the RTU side.
Example for 2 AIs, ‘4-20 mA’:
Technical specifications
- Number of ANA inputs: 4 in measuring current 4-20 mA
- Type:
- Precision: 0.1% (25°C)
- Resolution: 16 bits
- Remote power feeding:
- 2 sensors per remote power feed
- Voltage = 16V
± 10 %
- Protection current = 50 mA (maximum for 1 or 2 inputs)
- Input impedance:
- 100
Ω
S4W
AI 4-20mA cable
Sensor
Wiring a surge arrester
AI terminal strip:
1 pair for ANA input no.1
(Case for remotely powered sensor)
1 pair for ANA input no. 2
(Case for autonomous sensor)
1 pair
for ANA input no. 1
1 pair
for ANA input no. 2
Sensor, 4-20 mA