Remote Displays
SITRANS RD100
Operating Instructions 01/2011
SITRANS
SITRANS RD100 Loop Powered Meter
SITRANS RD100
SITRANS RD100 is a 2-wire loop powered, NEMA 4X enclosed remote digital display for
process instrumentation.
This digital meter is easy to use with a display of 3.5 digits, 1" (2.54 cm) high. It accepts 4 to
20 mA input and operates from -40 to +80 °C (-40 to +176 °F).
SITRANS RD100 is CSA and FM Approved.
Safety Notes
Special attention must be paid to warnings and notes highlighted from the rest of the text
by grey boxes.
WARNING: means that failure to observe the necessary precautions
can result in death, serious injury, and/or considerable material
damage.
CAUTION: means that failure to observe the necessary precautions can
result in considerable material damage.
Note: means important information about the product or that part of the operating
manual.
The Manual
This manual provides specifications and instructions for the operation of SITRANS RD100
Remote Display. The manual is designed to help you get the most out of your Remote
Display, and it provides information on the following:
•
•
•
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Meter specifications
Wiring diagrams
Installation requirements
Setup instructions
If you have any questions, comments, or suggestions about the manual content, please
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SITRANS RD100 – INSTRUCTION MANUAL
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Specifications
Note: Except where noted, all specifications apply to operation at +25 °C (+77 °F).
Display
•
1.0 " (25.4 mm) high LCD, numeric display range from -1000 to 1999
Enclosure
•
•
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Impact-resistant glass-filled polycarbonate body
Color: gray
Impact-resistant clear polycarbonate cover: NEMA 4X, Type 4X, IP67
Mounting
•
Standard:
wall mount
Optional:
•
•
•
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panel mounting kit (does not provide NEMA 4X seal to panel)
2" pipe mounting kit
Entity Parameters
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Vmax= 30 V, Imax = 175 mA, Ci = 0 µF, Li = 0 µH, Pi = 1.3 W
Input
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4 to 20 mA
Maximum Input Current
•
30 V DC
Maximum Voltage Drop
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1 V at 20 mA
Connections
•
Screw terminal block
Operating Temperature Range
•
•
-40 to +85 °C (-40 to +185 °F)
-40 to +40 °C (-40 to +104 °F) for Canadian installations
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Calibration
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Two-step; non-interacting low and high
Calibration Range
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4 mA input: display of -1000 to +1000 counts
20 mA input: display of 4 mA count value +20 to 2000 counts, to a max. display of
1999 counts
Accuracy
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±0.1% of span ±1 count
Conversion Rate
•
2.5 conversions per second
Approvals
•
Intrinsically Safe:
•
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FM/CSA Class I, II, III, Division 1, Groups A to G T4
FM/CSA Class I, Zone 0, Group IIC
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Non-incendive:
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FM/CSA Class I, Division 2, Groups A to D
FM/CSA Class II and III, Division 2, Groups F and G
See "RD100 Remote Display - Approval Connections Control Drawing" shipped with the
unit and located on the Instruction Manual CD, for complete Intrinsically Safe installation
instructions.
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Mounting
Wall Mounting
wall mounting
holes beneath
cover screws
D
E
F
A
C
B
SIDE VIEW
FRONT VIEW
Dimensions
A: 80 mm (3.15")
B: 140 mm (5.51")
C: 60 mm (2.36")
D: 120 mm (4.72")
E: 65 mm (2.56")
F: 20 mm (0.79")
Wall mounting holes: Ø 4 mm (0.16")
Weight: 340 g (12 oz)
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Optional Panel Mounting Kit
mounting
bracket
self tapping
screw
washers
panel
mounting plate
RD100
Notes
•
•
The optional panel mounting kit does not provide a NEMA 4X seal to panel.
Mounting brackets require 20 mm (0.8") clearance on either the top or the side
of the meter for installation.
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•
•
Allowable panel thickness: 1.5 mm - 3.2 mm (0.060" - 0.125")
Mounting plate dimensions: 163.3 mm x 102.9 mm x 3.2 mm (6.43" x 4.05" x 0.125")
Panel cutout required:
138.4 mm x 77.5 mm (5.45" x 3.05")
Instructions
1. Insert the RD100 through the mounting plate.
2. Mount the complete assembly on the panel.
3. Secure with 4 brackets and 4 screws (supplied) at the corners of the meter. Use
washers as needed to allow for panel thickness.
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Connections
Calibrator connected to input signal PCB
display PCB component side
(may be removed for bench calibration)
LO calibration control
DP1
DP2
DP3
HI calibration control
balance control
(factory adjust only)
S+
S-
black
red
S+
S-
S+
S-
loop jumper
input signal PCB
(mounted to base of enclosure)
calibrated
current source
Control loop connected to input signal PCB
input signal PCB
S-
S+
S+ S-
Field wiring is made to
the input signal PCB
which is mounted to
the base of the
loop jumper
(remove when display PCB is connected)
enclosure.
power
4-20 mA
supply
transmitter
Non-hazardous area
Hazardous area
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Calibrator connected to display PCB
display PCB
component side
DP1
DP2
DP3
S+
S-
calibrated
current source
The display PCB may be removed from the enclosure for bench calibration.
Loop jumper must be installed on input signal PCB to maintain loop. Refer to
Servicing display PCB outside the loop on page 9.
WARNINGS:
• To maintain hazardous area protection, the input signal must
always be connected to the input signal PCB, and not directly to
the display PCB.
• Electrostatic hazard. Clean only with a moist cloth. Protect
enclosure from exposure to chemical solvents and excessive
ultraviolet (UV) light (such as sunlight).
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Setup
WARNINGS:
• If any of the following operations are performed in the hazardous
area, all appropriate hazardous area procedures must be
followed.
• To prevent damage to electronic components caused by
electrostatic discharge, a grounding strap should be worn when
servicing the display.
For calibration, a calibrated current source and a screwdriver are required.
Calibration connections
To access the input terminals, remove the enclosure cover and the display PCB.
1. Loosen the four screws on the enclosure cover and remove the cover.
2. Completely loosen the left screw that holds the display PCB to the enclosure and
loosen the right screw about four turns so the display PCB remains attached to the
enclosure.
3. Rotate the display PCB 90° to gain access to the input signal PCB.
4. Next, connect a calibrated current source as shown in Calibrator connected to input
signal PCB on page 6.
Decimal point selection
next to the display. It is labeled DP1, DP2, DP3.
Place a jumper over both pins of DP1 for a display of 199.9, DP2 for 19.99, or DP3 for 1.999.
Calibration
LO and HI calibration controls are located to the left of the display (see Calibrator
connected to input signal PCB on page 6).
1. Apply a signal equal to 4 mA and adjust the LO control to display the desired reading.
reading.
3. Complete the calibration procedure by making any minor adjustments to the LO and
HI controls.
Installation
To install the meter, remove the display PCB from its enclosure and connect a ½" conduit
fitting to the hole provided. Refer to Removing display PCB from the loop on page 9 for
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further details. Wall mounting holes are located in each corner of the enclosure (see
Mounting on page 4).
Loop connections
Disconnect power to the loop and install the meter as illustrated in Control loop
connected to input signal PCB on page 6 and Removing display PCB from the loop on
page 9. Replace the enclosure cover.
Removing display PCB from the loop
The display PCB and input signal PCB are connected together with one black and one red
wire. The wires are soldered to the display PCB and connected to a screw terminal
connector on the input signal PCB.
1. Remove enclosure cover and the display PCB as described in steps 1 to 3 of
Calibration connections on page 8.
2. Install loop jumper over both pins to bypass display PCB and allow the signal to flow
through the loop jumper. The display turns off when jumper is installed.
3. Disconnect the black and red signal wires from the screw terminal connector.
4. Loosen completely the right-side screw and lift display PCB from enclosure.
CAUTION: Care should be taken to prevent static electricity from
damaging the electronic circuitry.
Restoring display PCB to the loop
1. Loosen the four screws on the enclosure cover and remove the cover.
2. Secure display PCB to enclosure using right-side screw; do not tighten screw to
allow rotation of display PCB while accessing input signal PCB.
3. Connect red wire to S+ terminal and black wire to S- terminal, as shown in
Calibrator connected to input signal PCB on page 6.
4. Remove loop jumper to allow the signal to flow through display PCB (save push-on
jumper by placing over one pin only).
5. Tighten screws holding display PCB and install enclosure cover.
Servicing display PCB outside the loop
Two modes of input signal allow the user to remove the display PCB for service without
interrupting the loop as indicated above and operate the display PCB at another location
in a non-hazardous area. The loop remains connected to the input signal PCB while the
display PCB is absent for service. The user may operate the display PCB at another
location by connecting a signal to “S+” and “S-” wires on the display PCB. Refer to
Calibrator connected to display PCB on page 7.
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For more information
Siemens AG
Subject to change without prior notice
7ML19985JU01 Rev. 1.1
Industry Sector
1954 Technology Drive
P.O. Box 4225
Peterborough, ON
Canada K9J 7B1
© Siemens AG 2011
*7ml19985JU01*
Printed in Canada
email: [email protected]
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