2.2.4 CONNECTING THE 4-20 mA ANALOG OUTPUT (TI-500E-SS 4-20 ONLY
The digital indicator provides a passive analog 4-20 mA output on two wires designated
”4-20A” and “4-20B”. A 12-bit DAC is used along with a current loop transmitter. Since the
output is passive, you will need an external 24 VDC power supply.
The output tracks the weight displayed on the indicator, so you must first have the indicator
configured and calibrated correctly in order for it to work properly. Please see Appendix E on
application notes for this feature.
1. Connect your device cable (not included) to the appropriate terminal on the main board.
Figure 2-8: Analog Output Terminal – TI-500E-SS 4-20
2.2.5 CONNECTING THE RS-485 OUTPUT (TI-500E-SS 4-20 ONLY)
The TI-500E-SS 4-20 indicator comes standard with one full duplex RS-485 serial port,
designed for connection to either a PC or a serial printer through an RS-485 to RS-232
converter. The same port may be also used as a simplex, RS-485 port designed for
connection to a remote display.
NOTE: The product does not currently support multi-drop connectivity. Use Appendix B as a
guide to data transfer and commands.
1. Connect your device cable (not included) to the appropriate terminal on the main board.
Figure 2-9: RS-485 Output Terminal – TI-500E-SS 4-20
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The 4-20 mA analog output was an option on the standard TI-500E and TI-500E-SS indicator. For the TI-500E-SS
indicator, the connections are labeled “AA” and “BB”. For the TI-500E indicator, the two connections are wired to
pins 2 and 3 of the D-SUB9 serial port connector. For these indicators, all serial port communication functions were
removed to accommodate the 4-20 mA analog output. Appendix B is no longer applicable. In addition, almost the
entire “A” menu is excluded.
