INSTALLATION
SETUP AND PHYSICAL INSTALLATION
3 - 6
WBPEEUI110506A0
The signal terminals located in the electronics housing accept
wire sizes up to 14 AWG. The signal wiring supplies all power
to the transmitter. The power supply limits are 12 to 53 VDC
(12 to 42 VDC for certified applications) across the transmitter
inputs. Refer to Figure
for the load resistance limits, or use
the equation:
NOTES:
1.
The equation for load resistance is based on a maximum output
of 20 milliamperes with the - (negative) TEST terminal jumper screw
tightened. In some cases (initialize high, fail high, overpressure con-
ditions, etc.) the output may be higher. If this value is known, it can
be used in the denominator of the equation instead of 0.02.
2.
If the - (negative) TEST terminal jumper screw is loosened
½-turn, the minimum supply voltage is 12.7 VDC.
3.
If using the optional lightning arrestor, add 0.4 VDC to all mini-
mum supply voltage values.
The power supply and load resistance are variable over the
entire operating region shown in Figure
The TEST terminals have the same four to 20-milliampere sig-
nal as the PWR/OUTPUT terminals. Loosen the - (negative)
TEST terminal jumper screw ½-turn for calibration or testing.
Signal wiring should be shielded. Use twisted pairs for best
results. Connect the shield at the ground terminal inside the
electronics housing (Fig.
) or at the receiver.
NOTE: Connect the shield at one end only. Connecting the shield at
both ends may result in a ground loop condition.
Figure 3-4. Liquid Pressure Installation
T 0 2 2 0 5 A
D R A IN
IS O LAT IN G
VA LV E
R
max
V
12.00
–
0.02
-----------------------
=
Содержание platinum standard PTSP Series
Страница 1: ......