30731820-001 Honeywell Input module Brand new

NOTE

TB1: This is done through a 145 ohm resistor inline with a Positive Temperature Coefficient

(PTC) device that acts like a fuse (but never needs replacement). Thus, these field terminals

can be permanently shorted to ground without damage. This is an improvement over

Process Manager due to the inclusion of the PTC device.

5.2.5 Analog Input HART module wiring reference table

The following table summarizes the possible Analog Input wiring connections.

Input style Connection characteristics

Standard 2-wire transmitter

l Can use any of the 16 channels.

l No custom wiring required.

Standard self-powered

transmitter

l Can use any of the 16 channels.

l No custom wiring required.

Self-powered transmitter with

loop power(system ground)

l Can use any of the 16 channels.

l Custom wiring is required for channels 1-12: you must find

a screw terminal at ground for one leg of the transmitter.

Self-powered 3-wire transmitter

(system ground)

l Can use any of the 16 channels.

l Custom wiring is required for channels 1-12: you must find

a screw terminal at ground for one leg of the transmitter.

Table 5.8 Summary - Analog Input wiring connections

5.2.6 Allowable field wiring resistance - Analog Input HART module

The maximum allowable field wiring resistance between the transmitter and the IOTA connection

terminal is dependent upon the voltage requirement of the transmitter. The formula for

calculating the max wiring resistance for the Analog Input is given by the following equation.

Rmax = [(13.0 - Vtx) / (0.022)]

where: Vtx = Voltage required at the transmitter terminal

5.2.7 IOTA board and connections - Analog Input HART module

Series C Analog Input 6 inch, non-redundant IOTA and field wiring connection is displayed in the

following imag