The ID7sx weighing terminal is approved for operation in zone 1 and 21 hazardous
areas. It may only be used in areas in which the causes of static electricity build-up,
which lead to propagating brush discharges, have been eliminated.
If the ID7sx weighing terminal is used in hazardous areas, special care must be
taken. The code of practice is oriented to the "Safe Distribution" concept drawn up by
METTLER TOLEDO.
Competence▲ The weighing system may only be installed, maintained and repaired by
authorised METTLER TOLEDO service personnel.
Ex approval▲ No modifications may be made to the terminal and no repair work may be per-
formed on the modules. Any weighing platform or system modules that are used
must comply with the specifications contained in the installation instructions. Noncompliant equipment jeopardises the intrinsic safety of the system, cancels the Ex
approval and renders any warranty or product liability claims null and void.
ID7sx
▲ The safety of the weighing system is only guaranteed when the weighing system
is operated, installed and maintained in accordance with the respective instructions.
▲ Also comply with the following:
– the instructions for the system modules
– the regulations and standards in the respective country
– the statutory requirement for electrical equipment installed in hazardous areas
in the respective country
– all instructions related to safety issued by the owner
▲ The explosion-protected weighing system must be checked to ensure compliance
with the requirements for safety before being put into service for the first time,
following any service work and every 3 years, at least.
Operation▲ Prevent the build-up of static electricity. Always wear suitable working clothes
when operating or performing service work in a hazardous area.
▲ Do not use protective coverings for the device.
▲ Avoid damage to the system components.
Installation▲ Only install or perform maintenance work on the weighing system in the
hazardous areas if the following conditions are fulfilled:
– if the intrinsically safe characteristic values and zone approval of the individual
components are in accord with one another,
– the owner has issued a permit ("spark permit" or "fire permit"),
– the area has been rendered safe and the owner's safety co-ordinator has
confirmed that there is no danger,
– the necessary tools and any required protective clothing are provided (danger
of the build-up of static electricity).
▲ The certification papers (certificates, manufacturer’s declarations) must be present.
▲ Lay cabling securely so that it does not move and effectively protet it against damage.
▲ Only route cables into the housing of the system modules via the suitable screw
gland and ensure proper seating of the seals.
2Guide for installers 22008316B 04/09
Page 5
ID7sx
2System overview
2.1Typical configurations
Two power supply units are available for a weighing system with the ID7sx weighing
terminal: PSU and PSUx.
PSUPower supply unit in a safe area, multiple-scale connection and
PSUxPower supply unit in hazardous area, connection of only one scale
2.1.1Weighing terminal ID7sx, PSU and max. 3 weighing platforms
System overview
connection of peripheral devices are possible
possible
RS
CL
Terminal
Analog
interface ***
Ex-i
max. 20 m
ID7sx
Scale 1
K...x *
Scale 2
D...x ** /
Point Ex
system
solution ***
Scale 3
Analog
scale
Ex-i
max. 80 m
I/O
PSU
ID..sx
Terminal
TBrick-Ex
Scale 1
Interface
Com 1
RS232 /
CL20mA
Point-Ex
Scale 2
Com 2
Point-Ex
Scale 3
Com 3
*Only K...x weighing platforms with a TBrick...-Ex measuring cell are
permissible in this configuration.
**D...x weighing platforms with in-built Point Ex A/D converter.
***Minimum supply impedance 87 Ω in conjunction with slotcard Point-Ex.
Minimum supply impedance 250 Ω in conjunction with slotcard TBrick-Ex.
Guide for installers 22008316B 04/093
Page 6
System overview
2.1.2ID7sx weighing terminal, PSUx and 1 weighing platform
In conjunction with the PSUx power supply unit, only one weighing platform (K...x,
D...x, analog scale) or one Point Ex system solution can be connected to the ID7sx
weighing terminal.
Terminal
ID7sx
Analog
interface ***
Ex-i,
max. 20 m
Scale 1
K...x * /
D...x**
Scale 2
Point Ex ***
system
solution
Ex-i
max. 50 m
PSUx
ID7sx
Scale 3
Analog
scale
*Only K...x weighing platforms with a TBrick...-Ex measuring cell are
permissible in this configuration.
**D...x weighing platforms with in-built Point Ex A/D converter.
***Minimum supply impedance 250 Ω. Here, a maximum of 4 load cells with a
*Only K...x weighing platforms with a TBrick...-Ex measuring cell are
permissible in this configuration.
**D...x weighing platforms with in-built Point Ex A/D converter.
***Slotcard Viper-Ex (SW) as a power supply card for barcode scanners.
2.1.4D7sx weighing terminal, PSU, connection to Profibus-DP
Hazardous area
Terminal
ID7sx
Ex-i,
max. 20 m
K...x-T4*
Safe area
PSU
ID..sx
Terminal
TBrick-Ex
Scale 1
Interface
Com 1
Scale 2
Com 2
Scale 3
Com 3
RS232
24 V DC
Module
Profibus-DP
PLC with
Profibus-DP
interface
Profibus-DP
Guide for installers 22008316B 04/095
Page 8
System overview
2.2Description of the components
2.2.1Approvals
ID7sx weighing terminalIgnition protection typeENII 2G EEx ib IIC T4 –10 °C to +40 °C
II 2D IP65 T +55 °C
FMClass I, II, III; Division 1; Group A, B, C, D, E, F, G
ID7sx
Power supply unit
See installation instructions for PSU or PSUx
PSU/PSUx
K...x / D...x
See operating/installation instructions of the K...x or D...x weighing platforms.
weighing platforms
System solution Point ExSee guide for installers system solution Point Ex.
2.2.2Connections
View A
A
1 Weighing platform connections W1, W2, W3
2 I/O (outputs) connection / PSUx connection
3 PSU connection
12345
4 I/O (inputs) connection
5 Connection for serial interfaces C2, C3
2.2.3Connection options for ID7sx
Scale interfacesScale 1Scale 2Scale 3
IDNetstandardoptionaloptional
Analog interface–optionaloptional
Active CL/IDNet interface–optionaloptional
Serial interfacesC1C2C3
CL20mAstandardoptionaloptional
RS232–optionaloptional
Digital inputs/outputs8 I/O-ID7sxoptional
Memory moduleMemory-ID7sxoptional
6Guide for installers 22008316B 04/09
Page 9
ID7sx
3Installation
Installation
EXPLOSION HAZARD
The explosion-protected weighing system may only be installed according to the
respective guide for installers and the accompanying terminal diagram, depending
on the power supply unit.
Power supply unitGuide for installersTerminal diagram
PSUME-22006472PSU-ID7sx
ME-22006478
PSUx/230VME-22006386PSUx/230V-ID7sx
ME-22006397
PSUx/120VME-22006395PSUx/120V-ID7sx
ME-22006399
3.1Setting up system modules
3.1.1Setting up ID7sx weighing terminal
➜ Select a suitable installation site.
Bench stand or floor stand mounting
1. Remove stand clip on the ID7sx.
2. Place weighing terminal onto the bench or floor stand and mount with 4 screws.
Wall mounting
The ID7sx weighing terminal can be mounted to a wall using the wall bracket
(accessory).
Guide for installers 22008316B 04/097
Page 10
Installation
ID7sx
Procedure1. Drill securing holes and fit plugs in accordance with the drilling template on
Page 23.
2. Remove stand clip on the ID7sx.
3. Mount wall stand to weighing terminal with 4 screws.
4. Mount wall stand to the wall with the supplied 3 screws.
Installation in a switch cabinet
The mounting materials and a drilling template are included in the scope of supply.
➜ Discontinue the power supply before beginning installation work.
Producing cut-out on
switch cabinet
1. Tape the drilling template onto the inside of the switch cabinet and mark the
holes with a punch.
2. Drill holes with the specified diameter.
3. Saw out the cut-out for the cover exactly with the sabre saw, as otherwise
protection type IP65/IP66 will no longer be ensured.
4. Remove the drilling template from the switch cabinet again.
Preparing cover1. Unscrew all screws on the cover of the ID7sx and remove the cover toward the
front.
2. Unplug keyboard and display cables from the IDsx7 PCB.
3
1
2
3
3. Take out the cover seal and cut out the perforated corners of the cover seal (1)
with a sharp knife.
4. Insert the square nuts (2) with the rounded side facing downward.
5. Screw the two setscrews (3) into the holes in the cover as shown.
8Guide for installers 22008316B 04/09
Page 11
ID7sx
4
Mounting cover on
switch cabinet
Installation
4
567
Mounting lower housing
section
1. Position the cover on the switch cabinet door from the front with the setscrews.
2. Secure the cover with the two centre screws (4) from the inside.
3. Fix the housing claws (6) with the large screws (5) and the washers (7) in all
corners. Do not tighten the screws yet!
1. Reconnect the display and keyboard cables on the ID7sx PCB.
8
6
2. Position the lower housing section on the cut-out and secure it with the housing
claws (6).
3. Secure the device with 8 screws (8) on the cut-out and tighten all screws.
Guide for installers 22008316B 04/099
Page 12
Installation
ID7sx
3.1.2Setting up power supply unit
➜ Set up the power supply unit in accordance with the respective terminal diagram
and the accompanying guide for installers.
3.1.3Setting up weighing platforms
Note
When operating using the PSU power supply unit, a corresponding slotcard must be
installed for each weighing platform or system solution Point Ex.
➜ Set up weighing platform or analog scale in accordance with the K...x or D...x
operating/installation instructions or guide for installers.
3.2Connecting devices
Connect the devices in the following order:
1. Weighing platform(s) and/or system solution Point Ex to ID7sx weighing
terminal.
2. Interfaces (I/O, CL, Active CL/IDNet or RS232) if present.
3. ID7sx weighing terminal to PSU or PSUx power supply unit.
4. Equipotential bonding, see Section 3.4.
5. Connect power supply, see Section 3.5.
3.2.1Preparatory work
Connection of the devices is generally carried out with the accompanying standard
cables. Cables of other lengths can be used instead of the standard cables if they are
made in accordance with Section 4.1. This applies for the connections
• from the weighing platform or system solution Point Ex to the weighing terminal,
• from the weighing terminal to the power supply unit,
• from the interface(s) to the weighing terminal.
3.2.2General connection procedure
1. Open the device.
2. Insert custom-made cable. To do this
– remove the blind plug
– ensure exact course of cable and properly positioned seals
– tighten screw gland, using a tubular hexagon box spanner if possible
3. Connect cable in the device according to the terminal diagram.
4. Lay cable in the cable holders on the inside of the housing.
5. Attach plug label.
6. Close device.
10Guide for installers 22008316B 04/09
Page 13
ID7sx
Installation
3.2.3Connection of the digital inputs/outputs at the ID7sx
CAUTION
Design, calculation and installation of equipment to the digital inputs/outputs is
solely the responsibility of the owner.
1. Connect only intrinsically-safe equipment.
2. Check characteristic values for intrinsic safety in accordance with the conformity
certificate of the ID7sx and the equipment to be connected according to the
conditions in Section 3.3. Document checking of the characteristic values.
3. Make a cable on the weighing terminal side in accordance with Section 4.1 and
on the peripheral side according to the device to be connected. Heed the
maximum cable length here.
4. Connect the cable on the peripheral device side according to the intended device
there. Ensure correct polarity here:
Wiring of the inputsWiring of the outputs
3.3Selecting peripheral devices
CAUTION
Refer to the approval documentation of the peripheral device for all characteristic
values of the peripheral device listed in the following.
The following conditions must be fulfilled. See also terminal diagram 22006478:
(ID7sx) ≥ Uo (peripheral device)
1. U
i
(ID7sx) ≥ Io (peripheral device)
2. I
i
3. P
(ID7sx) ≥ Po (peripheral device)
i
4. C
(ID7sx) ≤ Co (peripheral device)
i
(ID7sx) ≤ Lo (peripheral device)
5. L
i
6. L (cable) / R (cable) < L
L (cable) is the length-based inductivity and R (cable) is the length-based
resistance of the cable to be used.
Calculating L
/ Ra for the peripheral device
a max
Using the ignition protection type-dependent energy value e of the peripheral device
yields the following:
L
/ Ra = 32 / 9 * e * Ri (peripheral device) / U
a max
where e = 40 mJ for equipment of ignition protection type IIC.
(peripheral device) / Ra (peripheral device), where
a max
max
Guide for installers 22008316B 04/0911
Page 14
Installation
ID7sx
3.4Equipotential bonding
Equipotential bonding must be installed by an electrician authorised by the owner.
METTLER TOLEDO Service only has a monitoring and consulting function here.
➜ Connect equipotential bonding (PA) of all devices (power supply unit, weighing
terminal and weighing platform) in accordance with the terminal diagram and
the country-specific regulations and standards. In the process it must be ensured
that
– all device housings are connected to the same potential via the PA terminals
– no circulating current flows via the cable shielding for intrinsically-safe circuits
– the neutral point for equipotential bonding is as close to the scale as possible
3.5Connecting power supply
EXPLOSION HAZARD
The mains connection of the power supply unit must be made by a professional
electrician authorised by the owner and in accordance with the respective terminal
diagram and the accompanying installation instructions and the country-specific
regulations.
12Guide for installers 22008316B 04/09
Page 15
ID7sx
4Optional work
4.1Making connection cables
Optional work
Customer-specific weighing platform cables for intrinsically-safe circuits must be
fabricated as follows:
Dimension A
(ID7sx)
2
215 mm
2
215 mm
Dimension B Max. length
1
1
215 mm
80 mm
1
1
80 m
20 m
ID7sx – PSU
ID7sx – weighing
Cable
9x2x0.5 mm
3x2x0.75 mm
platform / system
solution Point Ex
Wire end ferrules
with plastic collar,
crimp connection
AB
Push sleeve over
wires and shield
According to country-specific
regulations for intrinsically-safe circuits
Earthing cable screw gland
Cable shield
1. Cut cable to length and strip cable ends according to dimension A/B.
1
1
2. Shorten shielding on both sides to 10 mm.
3. Strip wire ends.
4. Crimp wire end ferrules onto wire ends with a crimping tool.
5. Push second rear section of earthing cable gland onto cable.
6. Push sleeve over wires and shield. Fold over cable shield.
7. Push on front section of cable gland and screw onto rear section.
Observe the following when connecting the weighing platform
1. When opening the terminal box of the weighing platform, remove the load plate if
necessary.
2. For weighing platforms of type KC, attach the cable to the base frame with a
cable tie in such a way that it does not contact the moving lever system.
3. For K...x weighing platforms, pull off the tear-away screw at the terminal box of
the weighing platform after connection of the weighing platform to the weighing
terminal for safety purposes.
4. Replace load plate if necessary.
Guide for installers 22008316B 04/0913
Page 16
Optional work
W1
Scale3
S3
ID7sx
4.2Installing additional scale interface or Active CL/IDNet module
Up to two additional scale interfaces (IDNet or analog) or Active CL/IDNet modules
can be installed in the ID7sx weighing terminal if not already installed at the factory.
The ID7sx, for example, can be connected to another ID7sx as a second display with
the Active CL/IDNet-ID7sx module in the hazardous area.
4.2.1Installing IDNet interface or Active CL/IDNet module
4
23
1
1. Open housing cover of ID7sx and unplug keyboard, display and backlighting
cables.
2. Mount spacer (1) at W2 or W3.
3. Attach module Scale-ID7sx (2) to connector W2 or W3. Ensure that the locking
tip of the spacer engages here.
4. Remove blind plug from desired scale connection.
5. Insert and mount weighing platform cable. Ensure the correct position of the outer
seal when doing so.
6. Label 6-pin plug (3) on module Scale-ID7sx as "Scale 2" or "Scale 3". The
stickers are located inside the housing.
7. Connect wires of the weighing platform cable or the interface cable from the
master terminal at the 6-pin plug W or W_A in accordance with terminal diagram
22006478.
8. Lay cable in the cable holder on the inside of the housing.
9. Unplug 3-pin plug (4) "S2" or "S3" from the ID7sx mainboard and insert it into
connector S or S_A on module Scale-ID7sx.
10. Reattach keyboard, display and backlighting cables to the mainboard.
11. Close housing cover of ID7sx again. Ensure correct position of housing seal
14Guide for installers 22008316B 04/09
when doing so.
Page 17
ID7sx
B
S1
1W
S1
S2
S3
Scale3
S3
1
2
4
9
5
6
7
8
10
3
6
Optional work
4.2.2Installing analog interface
1. Open housing cover of ID7sx and unplug keyboard, display and backlighting
cables.
2. Mount spacer (1) at W2 or W3.
3. Attach module Scale-ID7sx (2) to connector W2 or W3. Ensure that the locking
tip of the spacer engages here.
4. Unplug 3-pin plug (3) "S2" or "S3" from the ID7sx mainboard and insert it into
connector S on module Scale-ID7sx.
5. Label 6-pin plug (4) on module Scale-ID7sx as "Scale 2" or "Scale 3". The
stickers are located inside the housing.
6. If only one Point Ex PCB (9) is installed:
– Mount 2 spacer pins (7) at the housing floor.
– Attach Point Ex PCB and secure with lock washer (6) and nut (8).
7. If two Point Ex PCBs (9) are installed:
– Remove nut (8).
– Attach first Point Ex PCB and secure with lock washer (6) and spacer pin (7).
– Attach second Point Ex PCB and secure with lock washer (6) and nut (8).
8. Remove blind plug from desired scale connection.
9. Insert and mount weighing platform cable. Ensure the correct position of the outer
seal when doing so.
10. Connect wires of weighing platform cable to plug ST1 (5) of the Point Ex PCB (9)
in accordance with terminal diagram 22006478.
Guide for installers 22008316B 04/0915
Page 18
Optional work
C1
T1
S3
S2
S1
S3
ID7sx
11. Lay cable in the cable holder on the inside of the housing.
12. Connect 6-lead connection cable (10) between the 6-pin plug of the Scale-ID7sx
module and the ST2 plug at the Point Ex PCB.
13. Reattach keyboard, display and backlighting cables to the mainboard.
14. Close housing cover of ID7sx again. Ensure correct position of housing seal
when doing so.
4.3Installing memory module
A Memory-ID7sx memory module can be installed in the ID7sx weighing terminal if
not already installed at the factory.
1
1. Open housing cover of ID7sx and unplug keyboard, display and backlighting
cables.
2. Insert the module Memory-ID7sx (1) angled to the left into the SIMM slot and
then tilt it to the right until it is perpendicular with the mainboard and the clips
engage.
3. Reattach keyboard, display and backlighting cables to the mainboard.
4. Close housing cover of ID7sx again. Ensure correct position of housing seal
when doing so.
16Guide for installers 22008316B 04/09
Page 19
ID7sx
C3
C1
T1
S3
S2
S1
W
S3
Optional work
4.4Installing additional data interface
Up to two additional data interfaces (CL20mA-ID7sx or RS232-ID7sx) can be
installed in the ID7sx weighing terminal if not already installed at the factory.
1
32
1. Open housing cover of ID7sx and unplug keyboard, display and backlighting
cables.
2. Mount spacer (1) at C2 or C3.
3. Mount module CL20mA-ID7sx or RS232-ID7sx (2) to connector C2 or C3.
Ensure that the locking tip of the spacer engages here.
4. Remove blind plug from desired interface connection.
5. Insert and mount interface cable. Ensure the correct position of the outer seal
when doing so.
6. Label 4-pin plug on module CL20mA-ID7sx or RS232-ID7sx (3) as "C2" or
"C3". The stickers are located inside the housing.
7. Connect wires of the interface cable to the 4-pin plug in accordance with terminal
diagram 22006478.
8. Lay cable in the cable holder on the inside of the housing.
9. Reattach keyboard, display and backlighting cables to the mainboard.
10. Close housing cover of ID7sx again. Ensure correct position of housing seal
when doing so.
Guide for installers 22008316B 04/0917
Page 20
Optional work
C1
T1
S3
S2
S1
W1
S3
ID7sx
4.5Installing digital inputs/outputs
Digital inputs/outputs 8 I/O-ID7sx can be installed in the ID7sx weighing terminal if
not already installed at the factory.
4
1
3
2
1. Open housing cover of ID7sx and unplug keyboard, display and backlighting
cables.
2. Remove the 4 nuts (3) from the mainboard and place 4 spacer pins (1) in their
places.
3. Mount the module 8 I/O-ID7sx (4) to the ID7sx mainboard with 4 nuts.
4. Insert ribbon cable (2) into connector I/O on the ID7sx mainboard.
5. Remove blind plug from the back of the housing.
6. Insert and mount interface cable. Ensure the correct position of the outer seal
when doing so.
7. Connect wires of the interface cable to module 8 I/O-ID7sx.
8. Lay cable in the cable holders on the inside of the housing.
9. Reattach keyboard, display and backlighting cables to the mainboard.
10. Close housing cover of ID7sx again. Ensure correct position of housing seal
when doing so.
18Guide for installers 22008316B 04/09
Page 21
ID7sx
Optional work
4.6Connecting barcode scanner
A barcode scanner, e.g. ELB SK200 (SC20-MTA1), can be connected to the ID7sx
weighing terminal via an intrinsically safe RS232 data interface.
The barcode kit for ID7sx consists of the following components:
• Barcode scanner ELB SK200 (SC20-MTA1)
• RS232-ID7sx module
• Viper-Ex slotcard (SW)
• Screw gland
Mounting
1. Install Viper-Ex (SW) slotcard in the PSU. See PSU installation instructions.
2. Install RS232-ID7sx module in the ID7sx weighing terminal as COM2 or COM3.
See Section 4.4.
3. Pull in the barcode scanner cable and mount it with the screw gland.
4. Connect wires of the barcode scanner cable at plug C2 or C3 in accordance with
terminal diagram 22006478.
Caution
The yellow wire insulated with a heat-shrink sleeve may not be connected in the
hazardous area!
Note
• The yellow wire of the barcode scanner cable is insulated with a 1.5 cm heat-
shrink sleeve at the factory.
• The green, brown and white wire of the barcode scanner cable is stripped 3 cm at
the factory and provided with wire-end ferrules.
Heat-shrink sleeve 1.5 cm
yellow
3 cm
wire end ferules
green
brown
white
R./4
R./3
R./2
R./1
Guide for installers 22008316B 04/0919
Page 22
Optional work
ID7sx
4.7Attaching Profibus-DP module
The ID7sx can be connected to a Profibus network with the Profibus-DP module.
The Profibus-DP module is a top-hat rail module for installation in the control
cabinet. It requires an external power supply of 24 V DC +/- 20%, 100 mA.
Condition
A slotcard interface with the RS232-PSU module must be installed and connected up
in the PSU for a data interface CL20mA-ID7sx of the ID7sx. See Section 4.4 or the
PSU installation instructions.
1. Insert the Profibus-DP module at the relevant interface connection of the PSU.
2. Connect the Profibus-DP module to the 24 V power supply.
3. Integrate the Profibus-DP module into the Profibus network.
4. In master mode of the ID7sx, select the PROFIBUS DP operating mode for the
relevant interface and set parameters. See ID7sx weighing terminal operating
instructions.
5. De-energise the Profibus-DP module after setting all parameters.
6. Connect the Profibus-DP module to the power supply again. The parameter
settings made are now active and the ID7sx is integrated into the Profibus-DP
network.