Wiring; Important Safety Wiring Considerations; Ac Power Wiring; Thermocouple Input - Extech Instruments 96VFL Series User Manual

4. Wiring

FIGURE 4.1: SERIES VFL WIRING (48VFL ON LEFT, 96VFL ON RIGHT)

4.1 IMPORTANT SAFETY WIRING CONSIDERATIONS

• Before wiring, verify the installed hardware options: Input (TC, RTD, Analog); Output
(relay, analog, dc trigger). The controller label should match the model number ordered,
contact Extech if there is any uncertainty. Improper wiring can cause personal injury and
damage to the controller and connected equipment.
• To avoid noise induction, keep input signal wires away from instrument power lines,
load lines and power lines of other electrical equipment.

4.2 AC Power Wiring

96VFL: Terminals 19 and 20 can safely accept 90 to 260VAC 50/60Hz.
48VFL: Terminals 1 and 2 can safely accept 90 to 260VAC 50/60Hz.
DC power 24VDC is optional.

4.3 Thermocouple Input

96VFL: Terminal 9 (-) and terminal 10 (+).
48VFL: Terminal 8 (-) and terminal 7 (+).

4.4 Analog Input (4-20mA) optional

96VFL Output 1: Terminal 18 (-) and terminal 17 (+).
96VFL Output 2: Terminal 16 (-) and terminal 15 (+).
48VFL Output 1: Terminal 11 (-) and terminal 12 (+).
48VFL Output 2: Terminal 17 (-) and terminal 16 (+).
VFL Series User Manual v2.0 10/20
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