Watlow Series D8 - Manual (Page 203)

Series D8 User’s Guide Chapter 8: Specifications
Doc. 0600-3120-2000 Watlow Anafaze 185
Inputs
The controller accepts analog sensor inputs which are mea-
sured and may be used as feedback for control loops. It also
accepts digital (TTL) inputs which may be used to trigger cer-
tain firmware features.
Table 8.9 Analog Inputs
Number of Control Loops
D84_- _ _ _ _ - _ _ _ _ : 4 loops
D88_- _ _ _ _ - _ _ _ _ : 8 loops
Number of Analog Inputs
D84_- _ _ _ _ - _ _ _ _: 4 loops with full range of input types
D88_- _ _ _ _ - _ _ _ _: 8 loops with full range of input types
Input Switching Differential, solid-state multiplexer
Input Sampling Rate
D84_- _ _ _ _ - _ _ _ _: 6 Hz (167 ms) at 60 Hz; 5 Hz (200 ms)
at 50 Hz
D88_- _ _ _ _ - _ _ _ _: 3 Hz (333 ms) at 60 Hz; 2.5 Hz (400
ms) at 50 Hz
Milliampere Inputs
0 to 20 mA (3 Ω resistance) or 0 to 10 mA (6 Ω resistance),
with scaling resistors
Voltage Input Ranges Available
0 to 12 V, 0 to 10 V, 0 to 5 V, 0 to 1 V, 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 source resistance
For other types of analog signals, the maximum source
impedance is 5000 Ω
Input Range -10 to +60 mV, or 0 to 25 V with scaling resistors
Resolution 0.006%, greater than 14 bits (internal)
Accuracy
0.03% of full scale (60 mV) at 25° C
0.08% of full scale (60 mV) at 0 to 50° C
Analog Over Voltage
Protection
± 20 V referenced to digital ground.
Maximum Common Mode Voltage 5 V input to input or input to analog common
Common Mode
Rejection (CMR)
For inputs that do not exceed ± 5 V, >60 dB dc to 1 kHz, and
120 dB at selected line frequency.
Calibration Automatic zero and full scale
Analog Ground to Frame Ground
Maximum
40 V
DC Common to Frame Ground
Maximum Potential
40 V
Open Thermocouple Detection Pulse type for upscale break detection