Specifications

Adding Components to the Option 12 Terminal Module
The back of the terminal module PCB (printed circuit board) provides surface
mount pads which can be used to add serial and parallel components to any
channel’s signal path. Figure 2-16 shows additional component locator information
(see the schematic and pad layout information on the back of the terminal module
PCB). Figure 2-17 shows some usage example schematics.
Field Wiring
Adding Components to the Option 12 Terminal Module
Chapter 2 43
Figure 2-16 : Additional Component Location Information
TO VT1419A
TO USER WIRING
TO USER WIRING
SH
SL
TO USER WIRING
Default Circuit
4to20mASense
5 V Full Scale with 250 Ohm (must use 16 Volt range)
4 V Full Scale with 200 Ohm (can use 4 Volt range for better resolution)
Normal Mode Low-Pass Filter Circuit
HI
HI
HI
HI HI
LO
LO
LO
LO
LO
SH
0Ohms
PHL
PHL
200 Ohms
or
250 Ohms
PHL
PH
PH
PH
PL
PL
PL
0Ohms
0Ohms
0Ohms
10 kOhms
SL
10 kOhms
SL
TO VT1419
A
TO VT1419A
4 - 20 mA NOTE: Input must not exceed common mode limits (usually
±16 Volts unless attenuated with a VT1513A)
Figure 2-17: Series & Parallel Component Examples
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