Dover OPW 88 Series - Specifications; Electrical Specifications

Rack Monitor 88XX
Document: Installation Manual
Date: January 2024
Version: A.0 subject to change
Page 7 of 30 – Installation Manual
1 Specifications
The Rack Monitor 88XX is a loading rack monitoring system which detects and controls loading operations from
overfilling and communicates a pending overfill condition to the loading rack control automation equipment by
means of a normally open relay contact. In addition, this non-permissive condition as well as diagnostic information
is displayed. A typical system contains loading rack control monitor (88XX Rack Monitor) and a API 10 wire
screened coiled cable with a black 10 pins 4 J-slot plug (Model 7400E).
“Optic” signal inputs allow compatibility with the EN13922 and applicable industry standards. Signals come from the
truck/trailer mounted on-board control monitor or sensors. Thermistor sensors are NOT supported in the 88XX
versions. The 88XX rack monitor supersedes the 84XX and 85XX type rack monitors and are suitable for
hazardous locations with intrinsically safe outputs and are housed in a IP 65, Explosion Proof “d” Enclosure.
Available versions are shown in the matrix below and installation of all versions is basically the same.
There are different types of rack monitors.
Model 8820 E or N is a rack monitor for 2-wire sensors only. Model 8850 E or N are for 5-wire sensors and the
8870 E or N is able to detect 2 or 5-wire sensors.
Above mentioned rack monitors are equipped with an Oled display and individual indicators per compartment and
separate indicators for grounding and bypass (indicated with a “0” at the end).
The colored label is according the European color-code (“E”).
ATEX/IECEx Certification Detail
Entity parameters in reference to ground (See Figure 1 for details)
J5
J7
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH9
U
out
V
12,45
12,45
12,45
12,45
12,45
12,45
12,45
12,45
12,45
-1,99
12,45
I
out
mA
40
40
40
42
40
40
40
133
170
17
37
P
out
mW
116
116
116
121
116
116
116
407
530
13.3
115
C
out
µF
7,7
7,7
7,7
7,7
7,7
7,7
7,7
7,7
7,7
7,7
C
in
µF
0
0
0
0
0
0
0
0
0
0
L
in
H
0
0
0
0
0
0
0
0
0
0
L
o
/R
o
mH/Ω
1,1
1,1
1,1
1,1
1,1
1,1
1,1
0,3
0,27
3
Figure 1
Note : Grounded shield/screen shall be provided to CH-9 to maintain intrinsic safety.