Instruction Manual PUC 28
45
10 Technical data
Measurement data
measurement range
-100 to +100 Pa or -250 to +250 Pa
accuracy
0.5 % of the measurement range + 0.3 Pa
resolution
0.1 Pa
amplitude drift per temperature
0.03 %/K (+10 °C...+50 °C)
overload capability
200-times
Ambient conditions
medium
air, all non-aggressive gases
operating temperature
+10 °C to +50 °C
storage temperature
-10 °C to +70 °C
conformity
Declaration of conformity available upon
request
Electrical data
power consumption
7 VA
supply voltage
24 VDC (± 10 %)
electrical connections
PTR: STLZ1550/14-3.81H (signal)
PTR: STLZ950/7-5.08H (relay)
Binder: 79-4450-20-05 (Profibus DP)
output signal
0 … +10 V (R
L
≥ 2 kΩ) or
0 … 20 mA (R
L
≤ 500 Ω) or
4 … 20 mA (R
L
≤ 500 Ω)
input signals (2x)
0 … +10 V (R
i
= 470 kΩ) or
0
… 20 mA (R
i
= 51 Ω) or
4 … 20 mA (R
i
= 51 Ω)
Relays
2 x changeover contacts
(optionally not present)
6 A / 230 VAC each
Table 24: Technical data
11 Troubleshooting
Problem
Cause
Corrective action
Display shows nothing
No power
Check the terminal
connections and supply
voltage
Pressure drops continuously
Leak
Firmly slide tubing completely
onto ports; adjust diameter
No Profibus communication
No cable connection
Firmly seat connector; check
terminating resistor
Intermittent acoustic signal
Alarm triggered
Confirm using any key
Table 25: Troubleshooting
Operating the PUC 28 at room temperature (20°C) ensures the highest
possible level of accuracy for pressure measurements.
