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3
Installation
NOTE
A milliamp monitoring instrument can be used in the circuit by
connecting the monitor’s positive lead to (+PS) and the negative lead to
(M). This allows monitoring the current loop without disconnecting the
main wiring.
3.2 Wiring the TX91 (Refer to Figure 3-5)
1. Connect a DC power supply in series with the load to the (+PS) and
(-PS) power terminals. Note that the load (usually a monitoring
instrument) may be connected to either the (+) or (-) power lead.
2. Connect the thermocouple to the (+IN) and (-IN) input terminals.