Siemens S5-135U/155U appendix Ohm 10 units, Pt 100 Resistance Thermometers

Analog Input/Output Modules

Measured-Value	The resolution with Pt 100 resistance thermometers is approximately 0.25 oC.
Representation for	1 ohm ￿ 10 units
Pt 100 Resistance
Thermometers

Units	Resistance in	Temper-
	ohms 1)	ature in
		oC
4096	400.0	±
4095	399.90	±
2049	200.98	269.1
2048	200.0	266.5
2047	199.90	266.0
1024	100.00	0
1023	99.90	±0.2
1	0.098	±
0	0.0	±

		Byte 0									Byte 1
7	6	5	4	3	2	1	0		6	5	4	3	2	1	0
								7
S 211 210 29 28 27 26 25								24 23 22 21 20 A E OV
0	1	1	1	1	1	1	1	1	1	1	1	1	0/1	0/1	1	Overflow
0	1	1	1	1	1	1	1	1	1	1	1	1	0/1	0/1	0	Overrange
0	1	0	0	0	0	0	0	0	0	0	0	1	0/1	0/1	0
0	1	0	0	0	0	0	0	0	0	0	0	0	0/1	0/1	0
0	0	1	1	1	1	1	1	1	1	1	1	1	0/1	0/1	0
0	0	1	0	0	0	0	0	0	0	0	0	0	0/1	0/1	0	Rated range
0	0	0	1	1	1	1	1	1	1	1	1	1	0/1	0/1	0
0	0	0	0	0	0	0	0		0	0	0	1	0/1	0/1	0
								0
0	0	0	0	0	0	0	0	0	0	0	0	0	0/1	0/1	0

1) Resistance value PT 100

A = Active bit

E = Error bit

OV = Overflow bit

S = Sign

When Pt 100 resistance thermometers are connected, the maximum temperature in the rated range is 266 oC. If it can be ensured that the temperature does not exceed 850 oC, the input value may extend into the overrange. The resolution is then 4095 units. Unused inputs can be utilized for voltage measurements in the 500 mV range (see front connector assignments).

9-70	System Manual
	C79000-G8576-C199-06