Compliance Voltage - Fisher FIELDVUE DVC6200 Instruction Manual

Instruction Manual
D103605X012
Table 2‐1. Cable Characteristics
Cable Type
BS5308/1, 0.5 sq mm
BS5308/1, 1.0 sq mm
BS5308/1, 1.5 sq mm
BS5308/2, 0.5 sq mm
BS5308/2, 0.75 sq mm
BS5308/2, 1.5 sq mm
BELDEN 8303, 22 awg
BELDEN 8441, 22 awg
BELDEN 8767, 22 awg
BELDEN 8777, 22 awg
BELDEN 9501, 24 awg
BELDEN 9680, 24 awg
BELDEN 9729, 24 awg
BELDEN 9773, 18 awg
BELDEN 9829, 24 awg
BELDEN 9873, 20 awg
1. The capacitance values represent capacitance from one conductor to all other conductors and shield. This is the appropriate value to use in the cable length calculations.
2. The resistance values include both wires of the twisted pair.

Compliance Voltage

If the compliance voltage of the control system is not known, perform the following compliance voltage test.
1. Disconnect the field wiring from the control system and connect equipment as shown in figure 2‐3 to the control
system terminals.
Figure 2‐3. Voltage Test Schematic
CIRCUIT
UNDER
TEST
A6192‐1
2. Set the control system to provide maximum output current.
3. Increase the resistance of the 1 kW potentiometer, shown in figure 2‐3, until the current observed on the
milliammeter begins to drop quickly.
4. Record the voltage shown on the voltmeter. This is the control system compliance voltage.
For specific parameter information relating to your control system, contact your Emerson Automation Solutions sales
office.
(1)
Capacitance Capacitance
pF/Ft
61.0
61.0
61.0
121.9
121.9
121.9
63.0
83.2
76.8
54.9
50.0
27.5
22.1
54.9
27.1
54.9
kW
1 POTENTIOMETER
VOLTMETER
(1)
Resistance
pF/m Ohms/ft
200 0.022
200 0.012
200 0.008
400 0.022
400 0.016
400 0.008
206.7 0.030
273 0.030
252 0.030
180 0.030
164 0.048
90.2 0.048
72.5 0.048
180 0.012
88.9 0.048
180 0.020
MILLIAMMETER
Wiring Practices
February 2017
(2) (2)
Resistance
Ohms/m
0.074
0.037
0.025
0.074
0.053
0.025
0.098
0.098
0.098
0.098
0.157
0.157
0.157
0.042
0.157
0.069
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