Tbai Diagnostics; Tbai Jumper Configuration - GE Mark VIeS System Manual

4.3.3 Specifications
Item
Number of channels
AI types supported
Input accuracy
Outputs
Maximum lead resistance
Output load
Fault detection
Size

4.3.4 TBAI Diagnostics

Diagnostic tests are made on the terminal board as follows:
• The terminal board provides the voltage drop across a series resistor to indicate the output current. The I/O pack creates a
diagnostic alarm (fault) if either of the two outputs goes unhealthy.
• Each cable connector on the terminal board has its own ID device that is interrogated by the I/O pack. The ID device is a
read-only chip coded with the terminal board serial number, board type, revision number, and the JR, JS, JT connector
location. When this chip is read by the I/O pack and a mismatch is encountered, a hardware incompatibility fault is
created.

4.3.5 TBAI Jumper Configuration

The terminal board is configured by jumpers. For the location of these jumpers, refer to the installation diagram. The jumper
choices are as follows:
• Jumpers JP1A through JP8A select either current input or voltage input.
• Jumpers JP1B through JP8B select whether the return is connected to common or is left open.
• Jumpers JP9A and JP10A select either 1 mA or 20 mA input current.
• Jumpers JP9B and JP10B select whether the return is connected to common or is left open.
112 GEH-6855_Vol_II
TBAI Specification
12 channels with 10 Analog Inputs (AI) and 2 Analog Outputs (AO)
Inputs 1 to 8: ±5 V dc, ±10 V dc, or 4–20 mA
Inputs 9 to 10: 4–20 mA or ±1 mA
±0.1% of full scale over the full operating temperature range
24 V outputs provide 21 mA each connection
15 Ω maximum two-way cable resistance, cable length up to 300 m (984 ft)
800 Ω max for 4-20 mA output
Monitor total output current
Check connector ID chip for hardware incompatibility
10.16 cm wide x 33.02 cm high (4.0 in x 13 in)
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
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