Watlow CPC400 - Manual (Page 186)

Chapter 7: Specifications CPC400 Series User’s Guide
172 Watlow Anafaze Doc. 0600-2900-2000
Table 7.11 Analog Inputs
Table 7.12 Pulse Inputs
Number of Control Loops
CPC404: 5
CPC408: 9
Number of Analog Inputs
CPC404: 4 with full range of input types, plus one pulse
CPC408: 8 with full range of input types, plus one pulse
Input Sampling Rate
CPC404: 6 Hz (167 ms) at 60 Hz; 5 Hz (200 ms) at 50 Hz
CPC408: 3 Hz (333 ms) at 60 Hz; 2.5 Hz (400 ms) at 50 Hz
Transient Voltage Isolation
Between inputs: 280 V Å (ac)
Input-to-digital circuitry: 530 V Å (ac)
Maximum Common Mode Voltage 5 V from input to analog common
Common Mode
Rejection (CMR)
>60 dB dc to 1 kHz, and 120 dB at selected line frequency
A/D Converter Integrates voltage to frequency
Resolution 0.006%, greater than 14 bits (internal)
Input Range -10 to +60 mV, or 0 to 12 V with scaling resistors
Accuracy
0.03% of full scale (60 mV) at 25°C
0.08% of full scale (60 mV) at 0 to 50°C
Calibration Automatic zero and full scale
Open Thermocouple Detection Pulse type for upscale break detection
Milliampere Inputs
0 to 20 mA (3 Ω resistance) or 0 to 10 mA (6 Ω resistance),
with scaling resistors
Special Input Voltage Ranges
Available 0 to 12V, 0 to 10V, 0 to 5V, 0 to 1V, 0 to 500 mV, 0 to 100 mV
with scaling resistors
Source Impedance
For 60 mV thermocouple, measurements are within specifica-
tion with up to 500
Ω
resistance
For other types of analog signals, the maximum source
impedance is 5000
Ω
Number 1
Frequency Range 0 to 2000 Hz
Input Voltage Protection Diodes to supply and common
Voltage Levels
<0.7V = Low
>1.9V = High (TTL)
Maximum Switch Resistance to
Pull Input Low
1.5 k
Ω
Minimum Switch Off Resistance 30 k Ω