Mercury 2+ User manual

Mercury 2+
Mercury 2+ Operator Terminal
User Manual

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The Mercury 2+ has special conditions for safe use (denoted by X after the certificate number) applicable
to it. There are six conditions applied, which are shown verbatim below, followed by an explanation
written by Mercury HMI Ltd.
Sira Certification Services, specific conditions for safe use:
1. Parts of the enclosure are nonconducting and may generate an ignitioncapable level of
electrostatic charge under certain extreme conditions. The user should ensure that the equipment is
not installed or used in a location where it may be subjected to external conditions (such as high
pressure steam) which might cause a buildup of electrostatic charge on nonconducting surfaces.
Additionally, cleaning of the equipment should be done only with a damp cloth.
2. As aluminium is used at the accessible surface of this equipment, in the event of rare incidents,
ignition sources due to impact and friction sparks could occur. This shall be considered when the
equipment is being installed in locations that specifically require group II, category 1G equipment.
3. The equipment may be used in conjunction with a bar code wand, which may be unplugged. Only
the type bearing the certificate number Sira 02ATEX2297X may be used.
4. The bar code wand does not meet the 500 V insulation requirements. This shall be taken into
account when the equipment is being installed.
5 The user shall take account of the fact that the equipment has been assessed assuming a low risk of
impact in service.
6. The barcode wand shall not be used in the presence of combustible dust.
Mercury HMI Ltd explanation of the special conditions for safe use:
1. The Mercury 2+ has areas of the enclosure (for example, the display window) that could generate
static under some circumstances, and if the static were to build up then a spark could result. To
avoid this risk, do not clean or polish the device with a dry cloth or position it where jets of high
pressure steam or other gases could blast over its surface.
2. This is a warning that the enclosure is made of LM24 grade Aluminium, and there is the potential
for sparking to occur by impact or friction from objects hitting it. Hence position/protect the unit so
that it is unlikely to be struck.
3. This is not relevant to the Mercury 2+, since there is not a bar code wand available and the socket is
not fitted.
4. Not relevant, see 3 above.
5. Please position the Mercury 2+ terminal to avoid it being physically struck in normal operation.
6. Not relevant, see 3 above.
Specific Conditions Of Use

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Contact
Mercury HMI Ltd
George House
Derwent Road
Malton
North Yorkshire
YO17 6YB
UK
Tel: [phone]
Fax: [phone]
Email: [email protected]
Web: www.mercuryHMI.co.uk
All trademarks are acknowledged as the property of their respective owners.
This document shall not form part of any contract. Specifications are subject to change without notice,
and Mercury HMI Ltd accepts no liability of any kind for errors or omissions.

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Mercury 2+ Operator Terminal User Manual Page 7 of 82 2019r0
Revision History
Rev Date Changes
080804 13 Aug 08 Mercury IMC Version
090302 2 Mar 09 Various minor updates
090713 13 Jul 09 Various minor updates
110317 17 Mar 11 Changed to Mercury HMI
Added Special conditions of use
2014r0 11 Nov 14 Rewritten in Scribus
Fix various typos
Updated "C" Multidrop ID
Added extra Setup options
Added extra information regarding twisted pair cable usage
Updated paint type
Removed cabling parameters  see R507 manual
Added Firmware Upgrade
2019r0 1 Mar 19 Removed any reference to dust approvals
Added R507A Interface Module

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Contents
Introduction......................................................................................................................... 11
Installation........................................................................................................................... 13
Connections......................................................................................................................... 17
Powering Up........................................................................................................................23
Operation............................................................................................................................. 29
Technical Specification........................................................................................................45
Appendix A  References.....................................................................................................49
Appendix B  Multidrop Mode...........................................................................................51
Appendix C  Mercury 2+ Terminal Wiring Schedule........................................................ 55
Appendix D  R507/R507A I.S. Interface Module Wiring Schedule.................................. 57
Appendix E  Communication with the R507/R507A Interface Module............................ 59
Appendix F  Wiring Diagrams........................................................................................... 63
Appendix G  Modbus Operation........................................................................................ 73
Appendix H  Firmware Upgrades...................................................................................... 81

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Mercury 2+ Terminal
With Proximity Card
Reader

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Introduction
The Mercury 2+ is a robust operator interface for use within a
remote computer or microcomputer system. The terminal is ideal
for use in Oil & Gas, Petrochemical, Pharmaceutical, Paint and
other industries, where lowcost, high performance Intrinsically
Safe operation is mandatory. The Mercury 2+ is simple to install
and incorporates a setup facility for system configuration.
Weather proof to IP66 standard, the Mercury 2+ is approved for
Intrinsically Safe operation for group IIC gases within a zone 0
hazardous area. Power and communication are connected via an
Intrinsically Safe interface module mounted in a safe area. The
interface module provides RS232, RS422 or RS485
communications for point‑to‑point or multidrop systems.
The Mercury 2+ comprises a high contrast back lit liquid crystal
display, a tactile, alphanumeric keypad, dedicated socket for an
optional reader and external digital inputs and outputs.
Communications use standard 7 or 8 bit ASCII characters and
transmit inputs from the keypad or data from a security card reader.
The Mercury 2+ terminal and IS interface module may also be
used in any nonhazardous industrial location, where the
advantages of galvanic isolation are required.
An optional nonIntrinsically Safe version of the Mercury 2+,
which does not require an IS interface module, may be used in a
safe area. This version can be supplied with either RS232 or
RS422/485 communications, and is powered by an external 24 Volt
supply.
It should be noted that each unit will have two serial numbers:
Overview
Serial Numbers 1. ATEX serial number, as shown on the label affixed to the
front of the device.
2. Product serial number, as shown in the default startup
message when the unit is powered on.
It is highly likely that these two serial numbers will be different.

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Nomenclature &
Conventions
In this manual, ASCII single characters which are either control or
nonvisible codes (Hexadecimal 00  1F, 20 and 7F) are indicated
by enclosure in < >, for example, <ESC>.
Character strings which are indivisible sequences are shown
between quotation marks, for example, "<ESC> [ 2 J".
In the ASCII 7 and 8 bit code sets used by Mercury 2+, a character
is represented by two digits, each in the range hexadecimal 0 to F.
For example, <SP>, the space character is defined (20H).

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Installation
Mercury 2+ Terminals are approved for operation within a
hazardous area when connected to a R007/R507/R507A
Intrinsically Safe interface module. They may also be used within
a safe area using an RS232 or RS485/422 interface.
The Intrinsically Safe Interface Module provides galvanic
isolation between the I.S. hazard area connection and the 24 V d.c.
power & host communication ports. The connections to the
Mercury 2+ Terminal allow a cable length of up to 1 kilometre
within the hazardous area. The R007/R507/R507A Intrinsically
Safe interface module communication ports provide for RS232 and
differential transmit and receive terminals for RS422/485, with tri
state control.
The security card reader is factory fitted in place of the removable
front panel and is secured by four M5 stainless Steel caphead
bolts. The binary number contained on the customer card is read
when the card is presented to the card reader and the information is
made available to the host computer for a system response.
Earlier versions of the Mercury 2+ Terminals were approved for
Dust Hazards, newer units are not. Check the ATEX Label.
For your safety remember to implement all relevant
precautions and procedures. In the United Kingdom
installations must comply with BS5345:Part 4.
The Mercury terminal is weatherproof to IP66, so it can be
installed outside as well as under shelter or indoors.
Mount the terminal in a vertical position on an even surface, strong
enough to support its weight of 5.5 kg.
Position the unit so that the LCD and Keypad are convenient for
the operator, usually at eye level. Note that, in strong direct
sunlight, display clarity and service life may be reduced.
Card Reader
Dust Hazards
Locating the
Mercury Terminal
Mercury 2+ System

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Mounting the
Mercury 2+
Terminal

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1. Check that the connection panel cover or security card reader
is secured to the face of the Terminal; this prevents any dust
or water from entering the unit.
2. Remove the plastic protective plugs covering the four corner
mounting holes by pushing the plugs from behind. Retain
the plugs in a safe place. It is not necessary to remove the
back of the terminal.
3. Place the Terminal against the surface on which it is to be
mounted at the correct position and height for operator use
and mark the position of the four mounting holes using the
dimensions given (see Fig 2). Drill, and plug if necessary,
the mounting holes on the mounting surface.
4. Place the Terminal against the mounting surface and secure
the Terminal using four off M5 cap head screws (26 mm
shank) or similar.
5. To avoid electrochemical corrosion of the aluminium case,
the fixing bolts and nuts should be thoroughly greased.
6. Check that the Terminal is securely fastened to the mounting
surface and reinsert the plastic protective plugs into the four
corner holes.
Mounting
Procedure

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Power and communication connections to the Mercury 2+
Terminal are made via the R507/R507A Intrinsically Safe interface
module. The IS interface module should be installed in a safe area.
The cable screen should be connected to J5 pin 5 within the
Mercury 2+.
▲WARNING Power must be disconnected before connecting
or inspecting the IS interface module.
No Intrinsically Safe earth is required as the unit is Galvanically
isolated.
Mount the IS interface module on to a DIN standard (DIN 46277),
35mm transverse symmetrical rail.
For the complete interconnection diagram see Appendix F.
The interconnection cable between the safe area IS Interface
Module and the hazard area Mercury 2+ Terminal requires four
cores, which may be either two twisted pairs or a quad.
Where a quad is used, diagonally opposite cores should be paired
to reduce any communications crosstalk.
Where twisted pairs are used, one pair should be used for
TX1+/TX2+, and the other pair for RX1/RX2.
The wiring schedule for the IS interface module is listed in
Appendix D.
Hazardous Area
Connections
Connecting the I.S.
Interface Module
Connections

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Fig. 3
I.S. Interface
Module

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After installing the Intrinsically Safe interface module, you can
proceed to connect power and communication wiring to the
Mercury Terminal.
For the cable entry into the Mercury Terminal, fit a suitable
insulated cable gland (M20) on the four core or twin twisted pair
cable.
The terminal connection blocks are protected by a cover, or the
card reader if fitted. Remove the cover by unscrewing the four
retaining screws.
Power and communication connections are made to terminal block
J5, pins 1 to 4. The cable screen is connected to pin 5.
The Mercury 2+ has a "Simple Equipment Interface" to both
Digital Inputs and Digital Outputs.
The Digital inputs on J2 are whetted and can supply 2.1mA to the
Simple Apparatus Switch. This could be a reedrelay or a
NAMUR style proximity Switch.
J2 Pins 1, 2, 3, 4, 5 & 6
Uo = 29.4 V Li = 0
Io = 66.4 mA Ci = 0
Po = 262 mW Lo/Ro = 135 μH / Ώ
Co = 71 nF
Li = 0
The connections J2 pins 2, 4 and 6 are at a logic 0V. Only volt free
contacts are permitted for use with these digital inputs.
The Digital Outputs on J1 are isolated, voltagefree open
collectors.
J1 Pins 1, 2, 3 & 4
Uo = 29.4 V Li = 0
Po = 262 mW Ci = 0
Digital Inputs
Digital Outputs
Connectioning the
Mercury Terminal
Connecting to the
Terminal Blocks

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For non Intrinsically Safe connections, specify the Mercury 2+
Safe Area variant of the Mercury 2+. There are two choices, an
RS232 version and the RS485 & RS422 version.
Please note that operation in Multidrop mode is not possible if the
RS232 option is specified.
In RS232 mode, the Signal Ground needs to be commoned with
the incoming power 0V. This allows the same 4 core cable to be
utilised as for IS operation.
The Safe Area Mercury 2+ requires a nominal 24V supply (15V to
30V DC) to be fed into External 24V power connections on the
Mercury terminal located on terminal block J4, pins 1 and 2. The
current is typically 45mA.
The serial data connections utilise J5, as follows:
J5 Pin No IS Use RS232 RS422
1 TX1+ TX TX+
2 TX2+ TX
3 RX1 RX RX+
4 RX2 RX
5 Screen Screen Screen
When the Mercury 2+ is used in RS485 mode, the TX+ and RX+
should be connected together and the TX and RX should be
connected together. Ensure that the Mercury 2+ is set to Multi
drop mode.
Unscrew the caphead bolts retaining the cover below the Terminal
keypad.
Plug in the 4pin plug to J3.
Fit and screw the card reader into place, ensuring that the O ring is
correctly seated.
Unscrew the caphead bolts retaining the cover below the Terminal
keypad.
Plug in the 4pin plug to J6.
Fit and screw the card reader into place, ensuring that the O ring is
correctly seated.
Safe Area
Connection
Connecting the
Wiegand Card
Reader
Connecting Other
Card Readers