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19 Model 7500 Instruction Manual
Teledyne Analytical Instruments
8) Description on terminal block
Terminal block 1 <TN1>
Terminal block for analog output (non-isolated output)
Output : 4 to 20 mA or 0 to 100V DC
Between 1 – 2: CH5 output
Between 3 – 4: CH4 output
Between 5 – 6: CH3 output
Between 7 – 8: CH2 output
Between 9 – 10: CH1 output
Between 11 – 14: For internal connection. Must not be
wired. (Must not be used as junction
terminal.)
Between 15 – 16: CH8 output
Between 17– 18: CH7 output
Between 19 – 20: CH6 output
Terminal block 2 <TN2>
Between 1– 2: For O2 sensor input. (Input for our
Zirconia oxygen sensor or external
O2 sensor. Must not be used unless
O2 meter is added.)
Between 3 –12: For internal connection. Must not be
wired. (Must not be used as junction
terminal.)
Between 13 – 14: CH4 remote range changeover input
Between 15 – 16: CH3 remote range changeover input
Between 17 – 18: CH2 remote range changeover input
Between 19 – 20: CH1 remote range changeover input
Note: High range is selected when open. Low range is
selected when short-circuited. For details of action, refer to “6.7
Parameters Setting, “Remote Range”.