6f8a0 7,7 4, Communications function, 1 conncctians with the afioo terminal – Toshiba LF494 User Manual
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TOSHIBA
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11. Communications Function
I’he LF404 converter uses the HART protocol to transmit digital signals over the 4-20mA
output line- The ATIOO hand-held terminal is used to communicate with the LF4U4 using the
HART protocol. You can check or change configuraiion parameters, calibrate the flowmeter
or monitor the flowmeter measuring value from a remote place.
See the instruciion manual for the AH00 hand-held terminal (6F8A06yfJ) for details.
11.1 Conncctians with the AFIOO Terminal
Connect the probe cable of the AFinO terminal in parallel wdth the load resistmicc which Is
wired from the current output termii als
( +
and -)’ Use points such as pins of terminal board
or junction terminal to connect with the clip oflhe probe. Sec Figure 11.1. To connect the
AFIOO directly to the flowmcicr, use the terminals + ami - See Figure 11.2. These current
output terminals arc polarized (positive and ncgalivc) but you can connect the probe to these
terminals without considering their polarity.
Figure t l.t Connections to the current output line
Terminal block
Figure 11.2 Connections to the terminal block
- 1 2 8