l You can choose between the internal or external source. However, both cannot be used at the
same time.
l If an application does not require field sensor power through TB2, completely disconnect all
wiring from TB2 including jumper wires.
You can use the following connector in conjunction with TB2. The following figure displays the
terminal block for channel 1. There are similar connectors for the remaining channels.
Figure 6.7 ISOL/BUSSED terminal blocks
In the default configuration (as shipped from factory), the COM(x) (signal returns) for all the eight
channels are electrically isolated from each other and from system power return. Based on the
topology required, you can choose to connect the signal return to the system power return (TB2
pin 4) by installing a jumper across the terminal block for the required channel.
6.6.2 Verifying the connection
The following figure displays the LED DS1 on the IOTA.
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Chapter 6 - Series C PIM connectivity
Chapter 6 - Series C PIM connectivity
Figure 6.8 PIM TB2 - DS1 LED on IOTA
The green LED, DS1, on the IOTA adjacent to terminal block TB2 illuminates if either the Series C
system 24V internal system supply or an external user supplied power source is properly
connected to TB2. If this LED does not illuminate, check wiring to TB2, fuse F3, or the field wiring.
If TB2 is not used (no wires attached), then LED DS1 does not illuminate and this is normal.
