Data Flow Systems TCU800, Быстрый старт, Страница: 9 / 25

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P2-17 TXD_232 RS-232 transmit data to external device <24V / Not Rated
P2-18 RXD_232 RS-232 receive data from external device <24V / Not Rated
P2-19 GND RS-232 ground <24V / Not Rated
P2-20 SHIELD Internally connected to EARTH; cable shield for analog
monitor signals Ground
P2-21 4-20mA signal from transducer; - signal at pin P2-23;
internal 250 Ω shunt permanently connected
<24V / Not Rated
P2-22 0-5VDC or 0-10VDC or 4-20mA signal from
transducer; - signal at pin P2-23; jump pin P2-24 to P2-
23 to use as a 4-20mA input
<24V / Not Rated
P2-23 ANALOG- - signal return for both at P2-22 and
at P2-21 <24V / Not Rated
P2-24 SHUNT 250 Ω shunt resistor; jump to P2-23 to use a 4-20mA
signal for at P2-22
<24V / Not Rated
Bottom Rear Connector: P4 (Pump Controller Mode)
PIN# Name Description Electrical Rating
P4-1 Unused Reserved for future use; do not connect Not Connected
P4-2 RS485_GND RS-485 serial ground reference <24V / Not Rated
P4-3 RS485_B RS-485 serial interface B <24V / Not Rated
P4-4 RS485_A RS-485 serial interface A <24V / Not Rated
P4-5 SHIELD Internally connected to EARTH; Cable shield for
RS-485 or RS-232 Ground
P4-6 EX_GND_RAD RS-232 signal ground <24V / Not Rated
P4-7 RTS_RAD RS-232 Request to send <24V / Not Rated
P4-8 EX_TXD_RAD RS-232 transmit data to external device <24V / Not Rated
P4-9 EX_RXD_RAD RS-232 receive data from external device <24V / Not Rated
P4-10 CTS_RAD RS-232 clear to send <24V / Not Rated
P4-11 SDI12_GND SDI-12 return/ground <24V / Not Rated
P4-12 SDI12_DATA SDI-12 data <24V / Not Rated
P4-13 SDI12_PWR 12VDC power supply for SDI-12 bus devices <24V / Not Rated
P4-14 Unused Reserved for future use; do not connect Not Connected
Safety Precautions
Review the following statements before installing, servicing, or replacing the Telemetry Control Unit or
any of its components.
General Precautions
• Only trained and qualified personnel should install, service, or replace this equipment.
• Carefully read the installation and wiring instructions before connecting the TCU to its power
source.
• Do not work on the TCU, or connect or disconnect any of its cables, during periods of lightning
activity.
•
To prevent overheating the TCU, do not operate it in an area that exceeds the maximum
recommended temperature of -10°C to 60°C (14°F to 140°F). The upper temperature limit is
50°C (122°F) when using the recommended backup battery.