Wiring - Extech Instruments 48VTR User Manual

Wiring

N.O. Control Relay
Analog, or pulse
DC Trigger Output
90 to 264VAC
6 7 8+
N.C. Control
2, 3, or 4-wire
RTD Input
1- 2+ 3
Thermocouple
or Analog Input
AC Power Wiring
The AC supply terminals (6 and 7) accept 90 to 264VAC 50/60Hz without having to be
physically switched or specially configured. Do not connect the controller to a live power
source until all wiring, explained below, is correct.
Thermocouple Input
For a thermocouple input use terminal 1 (negative) and terminal 2 (positive).
Analog Input (4-20mA)
For an analog input, use terminal 1 (negative) and terminal 2 (positive).
RTD Input (2, 3, or 4 wire)
RTD inputs use terminals 1, 2, & 3. Select a scheme from one of the diagrams below.
1 2 3
3-wire RTD Input
9- 10
48VTR
Relay
Rear Terminal Designations
Please refer to the accompanying
paragraphs for actual wiring instructions
4 5
N.C. Alarm
Relay
Jumper
1 2 3
2-wire RTD Input
RTD Input Wiring
8 Model 48VTR - Version 5.0 – January 2006
1 2 3
4-wire RTD Input