Siemens SIWAREX WP251 User Manual

Technical specifications
13.1 Technical specifications
SIWAREX WP251
204 Manual, 12/2015, A5E37203357A
Maximum cable length between junction box and WP251
1000 m (3280 ft)
Common mode voltage range
0 V to 5 V
DMS supply
3)
4.85 V DC +2/-3 %
Short-circuit and overload protection
Yes
Connection 6-wire
Sensor voltage monitoring
≤ 0.3 V
Min. DMS input resistance
• without Ex-i
interface
SIWAREX IS
40 Ω
• with Ex-i inter-
face SIWAREX
IS
50 Ω
min. DMS output resistance
4 100 Ω
Temperature coefficient range
≤ ± 5 ppm/K v. E.
Temperature coefficient zero point
≤ ± 0.1 μV/K
Linearity error
≤ 0.002%
Measured value filtering
Low pass
Electrical isolation
500 V AC
50 Hz / 60 Hz noise suppression CMRR
> 80 dB
Input resistance
• Signal cable
typ. 5*10
6
Ω
• Sensor cable
typ. 60*10
6
Ω
1)
Relative accuracy! (Absolute accuracy is only reached by calibration on-site with calibration stand-
ard)
2)
Accuracy for module replacement or theoretical calibration decisive
3)
Value valid at sensor; voltage drops on cables are compensated up to 5 V
Analog output
The set replacement value is output in case of a fault or SIMATIC CPU stop.
Table 13- 4 Technical specifications:
Error limit according to DIN 1319-1 of full-scale
value at 20 °C +10 K
0 ... 20 mA: ≤ 0.5%
4 ... 20 mA: ≤ 0.3%
Refresh rate
≤ 100 ms
Resolution
14 bit
Measuring ranges 0 mA to 20 mA
4 mA to 20 mA
Max. output current
24 mA
Error signal (if configured (FW))
22 mA
Max. load
600 Ω
Temperature coefficient range
≤ ± 25 ppm/K v. E.
Temperature coefficient zero point typ. ± 0.3 μA/K
Linearity error
≤ 0.05%

Siemens SIWAREX WP251 Specifications

General

Brand	Siemens
Model	SIWAREX WP251
Category	Accessories
Language	English