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5. Installation
5. Installation
GTD-1000Tx(M)
Instruction Manual
5.3.1. Wiring for 4~20mA Source Operation Type
5.3.3. Wiring for 4~20mA 3Wire Sink Operation Type
5.3.2. Wiring for 4~20mA Sink Operation Type
5.4. Installation Cable Length
■ Connect 4-20 mA signal terminal at PLC side to 'mA'
of GTD-1000Tx(M). GND terminal is used in common
with power. Then, turn on the J1 jumper.
■ Connect (+) and (-) terminals for 4-20 mA sink output
at PLC side to VISO terminal and power (24V DC)
(-) terminal, respectively. Connect 'mA' terminal of
GTD-1000Tx(M) to 'GND' terminal. Then, turn off the
J1 jumper.
■ Connect (+) and (-) terminals for 4-20 mA sink
output at PLC side to VISO terminal and 'mA' terminal,
respectively.
Then, turn off the J1 jumper.
■ The maximum length between GTD-1000Tx(M) and power supply is decided by wire specification.
■ Max. Installation Length = VMAXDROP ÷ IMAX ÷ WIRER/m ÷ 2
·VMAXDROP: Maximum Power Loop Voltage Drop (=Power Supply voltage
- min operating voltage)
·IMAX : Max. Current of GTD-1000Tx(M)
·WIRER/m: The resistance of the wire (ohms/meter value available in wire manufacturer's specification data sheet)
■ Example of installation lengths using 24 V power supply and 16 AWG is as follows.
·GTD-1000Tx(M) minimum operating voltage = 18 Vdc
·VMAXDROP = 24 - 18 = 6V
·IMAX = 0.15A( 150mA )
·6 ÷ 0.15 ÷ 0.01318 ÷ 2 = 1,517.451m ≒ 1,517m
[Figure 6. 4-20mA Source Configuration]
[Figure 8. 4-20mA 3Wire Sink Configuration]
[Figure 7. 4-20mA Sink Configuration]
