PD685
intrinsically safe, NEMA 4, type 4X, iP67 Loop-Powered Meter
www.predig.com
4
Warning:
Electrostatic hazard. Clean only with a
moist cloth. Protect enclosure from exposure to
chemical solvents and excessive ultraviolet (UV)
light (e.g. sunlight).
!
HAZARDOUS AREA
NON-HAZARDOUS AREA
POWER
SUPPLY
+
-
Transmitter 4-Wire
Sig+ Sig-
P+
P-
Figure 5:
Control Loop Connections (4-Wire)
Figure 6:
Control Loop Connections with Backlight (4-Wire)
HAZARDOUS AREA
NON-HAZARDOUS AREA
POWER
SUPPLY
+
-
Transmitter 2-Wire
+
-
Figure 4:
Control Loop Connections with Backlight (2-Wire)
HAZARDOUS AREA
NON-HAZARDOUS AREA
POWER
SUPPLY
+
-
Transmitter 4-Wire
Sig+ Sig-
P+
P-
SIDE VIEW
Wall
Mounting
Holes
Beneath
Cover
Screws
E
F
FRONT VIEW
D
A
C
B
Figure 3
Dimensions and Wall Mounting Information
DiMENsiONs
Figure 7:
Dimensions and Wall Mounting information
A: 3.15" (80 mm) C: 2.44" (62 mm) E: 2.75" (70 mm)
B: 5.12" (130 mm) D: 4.41" (112 mm) F: 0.79" (20 mm)
CALIBRATED
CURRENT SOURCE
+
-
S+ Signal Positive Connection
S- Signal Negative Connection
B- Signal Negative Connection
if Using Backlight
Figure 1:
Calibrator Connection
Field wiring is made to the
back side of the printed
circuit board which is
mounted in the enclosure.
J2 - Decimal Point Location Selection
R4 - HI Calibration Coarse Control
R5 - HI Calibration Fine Control
R6 - LO Calibration Coarse Control
R7 - LO Calibration Fine Control
Figure 2:
Calibration Controls Location
HAZARDOUS AREA
NON-HAZARDOUS AREA
POWER
SUPPLY
+
-
Transmitter 2-Wire
+
-
Figure 3:
Control Loop Connections (2-Wire)
S+
Signal Positive Connection
s-
Signal Negative Connection
B-
Signal Negative Connection
(if using Backlight).
Caution:
Figures 1-6 are intended to serve as simplified wiring diagrams for
typical applications. For hazardous area applications, the PD685 must
be installed per the PD685 Intrinsic Safety Control Drawing (LIM685-2).
CONNECtiONs
