Rockwell Automation T80004 Application Note Field Loop Configuration - Manual (Page 44)

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AN-T80004 Field Loop Configuration
Issue 10 Jun 13 AN-T80004 44
Analogue or Digital Input module to VFTA
The T8842 VFTA has five power supply plugs. Each plug powers one ‘power group’ of eight channels
(see page 27). For field devices that require only milliamps to drive the loop current, only one dual 3A
supply is needed and the plugs should be linked together. For field devices that require more current,
each plug may be wired from a dual 3A supply. If 3A is not enough for eight channels, fit separate 24V
and 0V fused terminals for each channel. The diagram below shows only one 3A dual supply for low
current devices, with wire links between the terminals.
VFTA
TBFP1 1 2 3 4
Module
24V A 24V B
0V
TBFP4 1 2 3 4
TBFP3 1 2 3 4
TBFP5 1 2 3 4
TBFP2 1 2 3 4
To Screen Earth
To Safety Earth