1800 Series Installation

1800 Series
Data Line Protector
INSTALLATION INSTRUCTIONS
Bourns
Part No.
Peak
Signal
Voltage
Series DC
Resistance
Per Line
1810 / 1820-10
1810 / 1820-15
1811 / 1820-28
1812 / 1820-50
10 V
15 V
28 V
50 V
10 Ω
15 Ω
22 Ω
51 Ω
WARNING:
Max.
Short
Circuit
Current
220 mA
180 mA
150 mA
75 mA
Recommended
Fuse rating
Bourns
Part No.
Peak
Signal
Voltage
Series DC
Resistance
Per Line
200 mA
150 mA
125 mA
75 mA
1810 / 1821-10
1810 / 1821-15
1811 / 1821-28
10 V
15 V
28 V
10 Ω
15 Ω
22 Ω
If maximum continuous or short circuit current may
exceed specified values, a current-limiting fuse must
Max.
Short
Circuit
Current
350 mA
300 mA
250 mA
Recommended
Fuse rating
300 mA
300 mA
250 mA
be installed between the power supply or current source and the
equipment side of the protector. See above table.
General
Bourns® Model 1800 Series Data Line Protectors provide bidirectional protection. Therefore, they can be used in both
positive and negative supply systems.
Fig. 3). Cable shields can be passed through and may either be
grounded or not grounded at the protector via the grounding link
as shown in Fig. 4.
Each 1800 Series unit protects one differential pair (see Fig. 1),
or two individual data lines (see Fig. 2), or one current loop (see
Place protector(s) as close as possible to the equipment to be
protected.
Typical Connections
BLDG. 1
EQUIPMENT
COMMON AND/OR
GROUND
BLDG. 1
BLDG. 2
COMMON
GROUND
COMMON
GROUND
EQUIPMENT
COMMON AND/OR
GROUND
Figure 1
BALANCED OR DIFFERENTIAL INTERFACE
(i.e., RS-422)
EQUIPMENT
COMMON AND/OR
GROUND
COMMON
GROUND
BLDG. 2
COMMON
GROUND
EQUIPMENT
COMMON AND/OR
GROUND
Figure 2
UNBALANCED INTERFACE - TWO INDIVIDUAL CIRCUITS
(i.e., RS-232)
IMPORTANT: Common Ground = Chassis, Power and Earth
Ground. However, when earth grounding of electronic common
is not permissible, protector(s), including rail, may have to be
isolated from earth ground via a Bourns® Model 2027-15-B
Spark Gap as shown in Fig. 4.
BLDG. 1
BLDG. 2
ISOLATED RAIL
EQUIPMENT
COMMON AND/OR
GROUND
Figure 4
WHEN EARTH
GROUNDING IS NOT
PERMISSIBLE
COMMON
GROUND
COMMON
GROUND
Figure 3
CURRENT LOOP, 4-20 mA
EQUIPMENT
COMMON AND/OR
GROUND
ISOLATED
COMMON
BOURNS®
MODEL 2027-15-B
GAS DISCHARGE TUBE
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
1800 Series
Data Line Protector
INSTALLATION INSTRUCTIONS
Mounting Instructions
TS-35 RAIL MOUNTING (See Figure 5)
1. Using the clamp assembly, each protector can be installed or
removed without disturbing other protectors.
2. Protector establishes ground connections with the rail via the
clamp assembly. Tighten screw firmly.
3. Rail must be connected to common ground. A solid or
stranded No. 6 AWG tin-plated copper wire is recommended.
Length to be as short as possible and not to exceed 10 feet.
BUS BAR OR PLATE MOUNTING (See Figure 6)
1. Remove clamp assembly from protector.
2. Drill and tap bus bar or plate as shown.
3. Protector establishes ground connection with the bus bar or
plate via the 8-32 mounting/grounding screw. Tighten firmly.
4. Bus bar or plate must be connected to common ground.
A solid or stranded No. 6 AWG tin-plated copper wire is
recommended. Length to be as short as possible and not to
exceed 10 feet.
BUSBAR
PLATE
RAIL
E3/L3
GROUNDING
LINK
19.05
(0.75)
18.80
(0.74)
83.31
(3.28)
MOUNTING/GROUNDING
SCREW
ORILL #38
DIA.
FEED-THRU (E3/L3)
GROUNDING SCREW
2.57
(0.101)
9.53
(0.375)
MOUNTING/
GROUNDING
SCREW
ORILL #29
3.45
DIA.
(0.136)
TAP 8-32 INF-28
FEED-THRU (E3/L3)
GROUNDING
SCREW
28.96
(1.14)
27.94
(1.1)
49.02
(1.93)
CLAMP
ASSEMBLY
ALIGNMENT
PIN
DIA.
TS-32 RAIL P/N 36213
Figure 5
TS-32 RAIL MOUNTING
23.62
(0.93)
8-32 UNF-2A
44.45
LENGTH
(1.75)
3.18
(.125)
95.25
(3.75)
48.51
(1.91)
Figure 6
RECOMMENDED BUS BAR OR PLATE MOUNTING
Data Line Connections (See Figures 1-3)
WIRE PREPARATION
Minimum usable wire size is No. 24 AWG. Maximum usable wire
size is No. 14 AWG. Strip insulation to 0.3 inches.
LINE TERMINALS L1, L2, L3
Connect the line (field) wires which are subject to high voltage
surges to protector terminals L1 and/or L2. Connect the cable
shield (if any) to protector terminal L3. L3 is internally connected
to E3.
WARNING: Never connect field lines which are subject to
high voltage surges to the protector equipment terminals
E1 and/or E2. The protector may be damaged.
EQUIPMENT TERMINALS E1, E2, E3
Connect the equipment to be protected to protector terminals E1
and/or E2. Connect the cable shield (if any) to protector terminal
E3 unless it is desirable to float the shield at this point (see
Figures 1 and 2). E3 is internally connected to L3.
SHIELD GROUND OPTIONS (See Figure 4)
The shield is normally grounded at the protector with the E3/L3
grounding link in position A. If the shield is to be ungrounded,
move the grounding link to position B. Re-tighten mounting and
grounding screws firmly.
Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
10/13
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
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