<2. WIRING AND INSTALLATION>
2-11
IM 12A01A02-01E
8th Edition : Oct. 01, 2015-00
2.5
Sensor wiring
The FLXA202/FLXA21 can be used with a wide range of commercially available sensor types,
both from Yokogawa and other manufacturers.
Terminal screw size is M4, and torque of screw up is 1.2 N•m.
Pin terminal, ring terminal and spade terminal can be used.
Pin terminal: pin diameter: max. 1.9 mm
Ring and spade terminal: width: max. 7.8 mm
For details on the sensors, refer to the respective instruction manuals of the sensors.
NOTE
When input 2 is used, the upper-level module is for input 1. Be careful not to make a mistake
when wiring the modules.
l
FLXA202
When wiring covers are available:
Attach wiring cover 1. If the second input is available, wire the second module in the lower
level, and attach wiring cover 2.
Finally, wire the first module.
If the second input is not available, attach wiring cover 1, and then wire the first input.
Note that if the second input is not available, wiring cover 2 is not included.
When wiring covers are not available:
If the second input is available, wire the second module in the lower level first.
Then, wire the first module.
If the second input is not available, wire only the first input.
NOTE
Wiring covers are required intrinsic safety (Type is -C*).
In the case of other types, the cover is not attached to the FLXA202.
When all the detector wiring is complete, close the FLXA202 front cover, and turn the power on.
Check that the screen displays normally.
CAUTION
Do not tighten up four front panel screws one by one.
Each front panel screw should be tightened up in two times of screwing. And, firstly the screw at
the upper left should be screwed a bit, the next is at the lower right, third is at the upper right, and
fourth is at the lower left. The second round is the same sequence again to tighten up four screws.
Do not use an electric screwdriver with high revolutions. If an electric screwdriver is used for
these front panel screws, the revolutions of the electric screwdriver should be less than 400 rpm.
Four screws should be tightened to the following torque;
0.8 to 0.9
N•m
(for the plastic housing)
1.5 to 1.6
N•m
(for the stainless steel housing)
PH
SC
ISC
DO
SENCOM
2
