Pilz 20 748-03 User manual

Programmable Safety Systems

PSS-Range

PSS SB ACTIVE JUNCTION BASIS

Operating Manual

Item No. 20 748-03

2 Operating Manual: PSS SB ACTIVE JUNCTION BASIS

Contents

Function description 3

Intended use 5

Safety 6

EMCD 6

ESD 6

Warranty and liability 6

Safety guidelines 6

Disposal 6

Bus structure with PSS SB ACTIVE JUNCTION BASIS 7

Rules for incorporation 7

Rules for bus termination 7

Determining the bus cable runs and transmission rate 8

SafetyBUS p interfaces 9

SafetyBUS p main branch 9

SafetyBUS p sub branches 9

Installation 10

Supply voltage 11

Insulation voltage test 11

Connection 12

Connecting the supply voltage 12

Earthing 12

Main branch 12

Sub branches 12

Display elements 14

Faults 14

Technical details 15

Operating Manual: PSS SB ACTIVE JUNCTION BASIS

Function description

The PSS SB ACTIVE JUNCTION BASIS is a component part of the Pilz Active

Junction. An Active Junction consists of a base unit (PSS SB ACTIVE

JUNCTION BASIS) and up to two expansion modules (PSS SB ACTIVE

JUNCTION EXPANSION).

An Active Junction operates as an active junction with repeater function and is

designed for use in SafetyBUS p networks. It galvanically isolates up to 6 sub

branches from the SafetyBUS p main branch. The Active Junction can be used to

connect physically remote field devices to the SafetyBUS p main branch. The

field devices may be in either an IP20 or IP67 environment.

Fig. 1: Elements on the PSS SB ACTIVE JUNCTION BASIS (front view)

If the field devices are in an IP67 environment, the supply voltage for the field

devices can be provided via the Active Junction. In this case, special bus cable

will be required. This is designed for an IP67 environment and contains the lines

for the supply voltage for the field devices as well as the data lines. The

maximum extension of a sub branch is limited by a number of different factors

(number of bus subscribers in the sub branch, transmission rate, current

consumption of the connected field devices etc.).

The base unit PSS SB ACTIVE JUNCTION BASIS is designed for the formation

of two sub branches. If more than two sub branches are required, the expansion

module PSS SB ACTIVE JUNCTION EXPANSION can be used. It is possible to

connect a max. of two expansion modules. Each expansion module can be used

to connect two additional sub branches via the base unit to the SafetyBUS p main

branch.

Power

Traffic

Supply

Traffic

Supply

Sub-Br.Sub-Br.

ACTIVE JUNCTI N

CAN_L

GND

CAN_H

VCC

1... ...4

-X1-

-X2- 1... ...4

-X3-

-X4-

SHIELD

1... ...4

-X5-

Note:

1... ...4

-X0-

24V 0V

BASIS

1: Supply voltage terminal

2: Display elements sub

branch 1

3: Display elements sub

branch 2

4: SafetyBUS p interfaces

(sub branches)

5: Element for attaching an

expansion module

6: Functional earth

connection

7: SafetyBUS p interface

(main branch)

8: Terminals for connecting

the cable screening

4 Operating Manual: PSS SB ACTIVE JUNCTION BASIS

I/ D

PSS SB ACTIVE JUNCTI N BASIS

main branch

sub branch (2)sub branch (1)

IP20

IP67

drop line

IP20

1 1

3 3

4 4 4

1 Terminating resistor in

the main branch

(terminator)

2 Terminating resistor for

each sub branch of the

Active Junction

(integrated into the unit)

3 Field devices

4 T-connectors

5 Terminating resistor for

the sub branch

(terminator)

Fig. 2: Bus structure with PSS SB ACTIVE JUNCTION BASIS (principle)

The Active Junction is one of the non-safety-related devices on SafetyBUS p. It

is not assigned a Device Address. Although the Active Junction is not registered

as a bus subscriber, it must be regarded as a bus subscriber when establishing

the transmission rate.

If there is a short circuit in the supply voltage to a sub branch near to the Active

Junction (up to ca. 10 m cable runs), the supply voltage to the sub branch will be

switched off. The “Supply” LED for the relevant sub branch will turn red (see

sections entitled “Display elements” and “Faults”).

If a signal error occurs within a sub branch (permanent dominant signal level),

the sub branch will be ignored. The “Traffic” LED for the relevant sub branch will

turn red (see sections entitled “Display elements” and “Faults”).

Operating Manual: PSS SB ACTIVE JUNCTION BASIS

Intended use

The PSS SB ACTIVE JUNCTION BASIS is designed for use in SafetyBUS p

networks. It is suitable for connecting physically remote field devices (e.g. light

guards) to the SafetyBUS p main branch. Using the unit allows you to build a star

or tree structure, rather than the linear topology specified for SafetyBUS p.

If the field devices are in an IP67 environment, suitable cable and connection

materials must be used. The information in the guideline: “SafetyBUS p - IP67

Physical Layer Concept”, published by the SafetyBUS p Club International e.V.,

is binding.

Precise details on the PSS SB ACTIVE JUNCTION BASIS are provided in the

“Technical details” section. Use of the device outside the specifications given

here will be deemed as improper use. Any component, technical or electrical

modifications will be deemed as improper use.

Use of the PSS SB ACTIVE JUNCTION BASIS outside the areas described in

this manual will be deemed as improper use. Intended use includes following the

information in this documentation.

NOTICE

SafetyBUS p subscribers in the following table only support the PSS SB ACTIVE

JUNCTION BASIS from the stated version number onwards:

Table 1

From version

3.0

2.0

1.7

2.0

SafetyBus p module

PSS SB CPU

PSS SB 3006 CN-A

PSS SB 3006 DP-S

PSS SB 3006 IBS-S

PSS SB DI8O8

PSS SB DI16

PSS SB Router1

6 Operating Manual: PSS SB ACTIVE JUNCTION BASIS

Safety

The PSS SB ACTIVE JUNCTION BASIS is not a safety-related device.

EMCD

The device is designed for use in an industrial environment. Interference may

occur if used within a domestic environment.

ESD

CAUTION!

Electrostatic discharge can damage components on the device. Ensure against

discharge before touching the device, e.g. by touching an earthed, conductive

surface or by wearing an earthed armband.

Warranty and liability

All claims to warranty and liability will be rendered invalid if:

• The system was used contrary to the purpose for which it is intended

• Damage can be attributed to not having followed the guidelines in the

documentation

• Operating personnel are not suitably qualified.

• The housing was opened

• Any type of modification has been made (e.g. exchanging components on the

PCB boards, soldering work etc.)

Safety guidelines

The information and requirements stipulated in the “SafetyBUS p Installation

Manual” are valid when using the PSS SB ACTIVE JUNCTION BASIS (see

SafetyBUS p System Manual). Failure to comply with these stipulations will

render all warranty and liability claims invalid.

The guidelines in the “SafetyBUS p - IP67 Physical Layer Concept” of the

SafetyBUS p Club International e. V. must also be met.

Disposal

The device must be disposed of properly when it reaches the end of its service

life.

Operating Manual: PSS SB ACTIVE JUNCTION BASIS

Bus structure with PSS SB ACTIVE JUNCTION BASIS

Rules for incorporation

The Active Junction (base unit and expansion module) is transparent for all

telegrams on the main branch and sub branches. If a signal error occurs within a

sub branch (permanent dominant signal level), the sub branch will be ignored.

Please note the following rules:

• The physical arrangement of the Active Junction on the main branch can be

freely selected. However, bear in mind that run time delays on the signals must

be considered when using an Active Junction. These run time delays can be

expressed as constant virtual cable runs (see section entitled “Determining the

bus cable runs and transmission rate”).

• Using the Active Junction allows you to build a star or tree structure, rather than

the linear topology specified for SafetyBUS p. This reduces the effective

electrical cable runs (no return line needed).

• The relationship of the cable runs to the transmission rate should be

maintained.

• Where possible, plan to use only complete I/O-Groups in a sub branch. This

increases the availability if an error occurs.

Rules for bus termination

Each branch (main branch and sub branches) must be fitted with terminating

resistors.

• The signal lines (CAN_L and CAN_H) on the first and last bus subscribers on

the main branch should be fitted with terminating resistors (120 Ohm).

• The Active Junction is the first bus subscriber on a sub branch. The device has

an integral terminating resistor for each sub branch. The signal lines (CAN_L

and CAN_H) on the last bus subscriber on each sub branch should therefore

be fitted with a terminating resistor (120 Ohm). If necessary use special IP67

terminators.

8 Operating Manual: PSS SB ACTIVE JUNCTION BASIS

Determining the bus cable runs and transmission rate

NOTICE

Please read the information in chapter "Designing a SafetyBUS p network" of the

"SafetyBUS p Installation Manual".

If you are using Active Junction please also note:

• Examine every connection combination between the first and last bus

subscriber across all branches (see Fig. 3)

• If the line under examination contains Active Junctions, account for them with

the virtual cable runs as shown in Table 2:

Number of

Active Junctions

Virtual cable runs

(total)

50 m

100 m

90 m

Cable runs lDistance

between

adjacent Active Junctions

in the main branch

---

lDistance < 10 m

lDistance ≥10 m

I/ D

I/ D I/ D

main line

Distance

Active Junctions

I/ D I/ D

main branch

Distance

Fig. 3: Active Junction arrangement (example)

Table 2

INFORMATION

If possible place all Active Junctions on the main branch (see Fig. 4). This will

guarantee that a maximum of 2 Active Junctions with virtual cable runs will impact

on the main line.

Operating Manual: PSS SB ACTIVE JUNCTION BASIS

SafetyBUS p interfaces

SafetyBUS p main branch

Connection to the SafetyBUS p main branch is via a male 9-pin D-Sub connector.

Fig. 4: Configuration of the interface to the SafetyBUS p main branch

SafetyBUS p sub branches

Connection to the SafetyBUS p sub branches is via 4-pin screw connectors.

1: n.c.

2: CAN_L (brown)

3: CAN_GND (white)

4: n.c.

5: CAN_SHLD

6: n.c.

7: CAN_H (green)

8: Supply voltage for fibre-optic couplers

from Pilz

9: n.c.

n.c. = not connected

Male 9-pin D-Sub connector

9-pin

1234

Fig. 5: Configuration of the interface to the SafetyBUS p sub branches

4-pin screw connectors

(X1/X2)

1: CAN_L (brown)

2: GND (white)

(CAN_GND and VCC_GND)

3: CAN_H (green)

4: VCC (red)

(carried supply voltage 24 V)

10 Operating Manual: PSS SB ACTIVE JUNCTION BASIS

75 (2.95")

94 (3.70")

121 (4.76")

(1.77")

87 (3.42") 49,2

(1.94")

(0.196")

Installation

INFORMATION

Please refer also to the chapter entitled “Installation and Assembly” in the

“SafetyBUS p Installation Manual”.

The PSS SB ACTIVE JUNCTION BASIS is enclosed in a 45 mm P99 housing,

suitable for DIN rail mounting.

• The device should be installed in a control cabinet with a protection type of at

least IP54.

• There are two notches on the back of the unit for DIN rail attachment.

• If you are installing the unit on to a vertical DIN rail, ensure that it is mounted

securely by using a retaining bracket or an end angle.

Fig. 6: Dimensions

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