Reer JANUS MJBOX Bedienungsanleitung

8540705 • 18/12/2012 • Rev.6 9

INTERCONNECTION MODULES

JANUS MJBOX

GENERAL INFORMATION

The JANUS MJBOX modules are accessory devices designed to make the wiring of

JANUS J and J TRX, JANUS M and M TRX light curtains fast and safe, and to provide

the main controls necessary for their operation close to the protected gate.

In addition to the guided contacts safety relays piloted and monitored by the light

curtain, terminal boards for connecting the cables, bridges and dip-switch for the

configuration of the light curtain itself are also present inside.

DESCRIPTION

Externally both models have:

1. Connectors for connecting with the light curtain (M23 for RX and M12 for TX).

2. Fairlead for passage of cables towards the machine for:

- power supply;

- connection with output contacts of the internal safety relays and static

outputs of the light curtain;

- Muting enable signals from the outside;

- output signals which indicate the status of the safety light curtain.

The MJB1/MJB3 models also present:

1. Lighted restart button and output status / weak signal led.

2. Key selector switch for Override function.

3. Lamp to signal Muting/Override active.

Figure 1 - MJB1/MJB3

OVERRIDE

KEY

MUTING LAMP /

OVERRIDE

RESTART BUTTON -

OUTPUT STATUS LED

CABLE

FAIRLEAD

(Janus)

10 8540705 • 18/12/2012 • Rev.6

The MJB2 /MJB4 model has:

1. Lighted restart button and output status / weak signal led.

Figure 2 - MJB2/MJB4

It is also possible to match the MJB2 and MJB4 models (without muting

lamp and override command) with muting light curtains as they are fitted

with the required settings.

If connecting an MJB1 or MJB3 model to a JANUS J series safety barrier

(without Muting function), the following connections must be disregarded:

SW1 (pins 1,2,3,4), CJ5, CJ7 (pins 7,8) and CJ9.

For the JANUS, MI, ML, MT versions use of a muting lamp (internal or

external) (0.55W) is obligatory for correct functioning of the light

curtains.

Where the risk analysis of the application requires it, the light curtain

permits connection of an external lamp to signal active Muting (0.55W).

Perform a check of the operation of this lamp periodically verifying its

turning on during the Muting or Override phase.

CABLE

FAIRLEAD

RESTART BUTTON –

OUTPUT STATUS LED

(Janus)

8540705 • 18/12/2012 • Rev.6 11

CONFIGURATION

With the aid of the figures of the main board of the single models, the

configuration of the methods of the operating modes is described below.

This configuration is performed, following the descriptions of the following tables,

setting the various jumpers, connectors and dip-switches present on the same

card.

Figure 3 - Models MJB1/MJB2 main board

Figure 4 - Models MJB3/MJB4 main board

12 8540705 • 18/12/2012 • Rev.6

SELECTION OF MUTING MODE AND TIMEOUT MUTING (dip-switch SW1)

MI (2 sensors)

MI TRX (2 sensors)

1 2 3 4 5 6 7 8

CONCURRENT

timeout = 30 sec

on █see

paragraphs

below

off ███

1 2 3 4 5 6 7 8

CONCURRENT

timeout = 90 min

on █see

paragraphs

below

off ███

MI ("L" logic)

MI TRX ("L" logic)

MM TRX (ML version)

1 2 3 4 5 6 7 8

CONCURRENT

timeout = 30 sec

on ███see

paragraphs

below

off █

1 2 3 4 5 6 7 8 CONCURRENT

timeout = 90 min

on ███selection pre-

setoff █

MI 4 sensors

MT S4

MI TRX 4 sensors

MT TRX

MM TRX (MT version)

1 2 3 4 5 6 7 8

CONCURRENT

timeout = 30 sec

on █see

paragraphs

below

off ███

1 2 3 4 5 6 7 8

CONCURRENT

timeout =



on █see

paragraphs

below

off ███

MI 4 sensors

MT S4

MI TRX 4 sensors

MT TRX S4

MM TRX (MT version)

1 2 3 4 5 6 7 8

Sequential

timeout = 30 sec

on ███see

paragraphs

below

off █

1 2 3 4 5 6 7 8

Sequential

timeout =



on ███see

paragraphs

below

off █

ML - MT - MLS2

ML TRX

1 2 3 4 5 6 7 8 timeout = 30 sec

on █n.c. see paragraphs

below

off █

1 2 3 4 5 6 7 8 timeout = 90 min

on █

n.c. see paragraphs

below

off █

If a time out limit of 90min is a too short time for a particular machine cycle, the

configuration without time monitoring (t=∞) can be selected. In this case

alternative solutions or additional measures shall be implemented to detected the

condition of a muting function permanently active caused by accumulation of

faults or by the muting sensors activated all the time. For example for the

application of guarding the openings of a conveyor system (palletizers) by

monitoring appropriate signals generated by the transport system to determinate

if and when a pallet is in the detection zone.

Perform a specific risk analysis of the application if the timeout t =



is selected.

8540705 • 18/12/2012 • Rev.6 13

MANUAL /AUTOMATIC MODE SELECTION (dip-switch SW1)

ALL MODELS

1 2 3 4 5 6 7 8

Automatic

on see preceding

paragraph

█see

par.

below

off █

ALL MODELS

1 2 3 4 5 6 7 8

Manual

on see preceding

paragraph

█

see

par.

below

off █

OTHER CONFIGURATIONS NOT PERMITTED

RANGE AND TEST SELECTION (dip-switch SW1)

JANUS J

JANUS

MI/ML/MT

1 2 3 4 5 6 7 8

Low range *

on see preceding paragraphs █

off █

JANUS J

JANUS MI

1 2 3 4 5 6 7 8 High range *

on see preceding paragraphs █

off █

ALL MODELS

(excluding versions

TRX)

1 2 3 4 5 6 7 8

TEST

on see preceding paragraphs

off █

█

OTHER CONFIGURATIONS NOT PERMITTED

* IF TO SELECT THE RANGE OF OPERATION SEL_RANGE1 AND SEL_RANGE2 (PIN 1 and 6

TERMINAL BOARD CJ7) ARE USED, SET DIP 7 and 8 on OFF-OFF (TEST)

* ML/MT MODELS: ALLOWED ONLY THE LOW RANGE SELECTION.

SELECTION OF INTERNAL /EXTERNAL MUTING LAMP

JUMPER PIN DESCRIPTION SELECTION PRESET

1 – 2 External lamp enabled

Internal lamp enabled

2 – 3 Internal lamp enabled

SELECTION TYPE OF OVERRIDE

JUMPER PIN DESCRIPTION SELECTION PRESET

1A – 2A 1B – 2B Override 1

(with continuous action) Override 1

(with continuous action)

2A – 3A 2B – 3B Override 2(with pulse)

14 8540705 • 18/12/2012 • Rev.6

SELECTION STATIC OUTPUTS/RELAYS

JUMPER PIN DESCRIPTION SELECTION PRESET

1A – 2A 1B – 2B Static outputs

Relay

2A – 3A 2B – 3B Relay

READ FEEDBACK ENABLE

JUMPER PIN DESCRIPTION SELECTION PRESET

1 – 2 Read feedback not enabled

Read feedback enabled

2 –3 Read feedback enabled

SELECTION FEEDBACK INTERNAL/EXTERNAL RELAYS

JUMPER PIN DESCRIPTION SELECTION PRESET

1 – 2 Feedback external relays

Feedback internal relays

2 – 3 Feedback internal relays

INSTALLATION AND ELECTRIC CONNECTIONS

The JANUS MJBOX modules can be fixed to the wall, using the proper plastic brackets

inserted in the holes placed on the box rear side corners. These brackets can easily rotate

to reach 90°.

The light curtain must be connected to the respective connectors M23 and M12 (Fig. 1

and 2) using the cables.

The cables coming out from the fairlead (PG21) must be connected - depending on its

utilization - to the connectors CJ6 e CJ7.

Terminal board CJ6

CLAMP NAME DESCRIPTION

1 +24Vdc 24 20%

2 0V 0 Vdc

3 PE Earth clamp

4 SYSTEM STATUS Ref to JANUS instruction manual

5 NA2_B Ends of the contact normally open n. 2

6 NA2_A

7 NA1_B Ends of the contact normally open n. 1

8 NA1_A

9 NCB Ends of contacts normally closed, in parallel

(present only in models MJB3 and MJB4)

10 NCA

8540705 • 18/12/2012 • Rev.6 15

Terminal board CJ7

CLAMP NAME DESCRIPTION

1 SEL_RANGE1 Range selection external control

2 EXT LAMP Output of External MUTING lamp (24V; max 5W)

3 OSSD1 Safety static output 1

4 OSSD2 Safety static output 2

5 K1_K2 Input Feedback external relays K1/K2

6 SEL_RANGE2 Range selection external control

7 MUTING_STATUS Output condition of muting function (only for cur. M TRX)

8 MUTING_ENABLE Input of Muting enable (only for cur. M TRX)

Figure 5 - Internal scheme of contacts available on safety relays of MJB1/MJB2 and

MJB3/MJB4

SIGNALS

SIGNAL MJB1/MJB3 MJB2/MJB4

CONDITION MEANING CONDIZIONE MEANING

OUTPUT STATUS

(Green)

ON Outputs active ON Outputs active

Flashing

Optical signal

received weak *

(Ref. to JANUS

instruction manual)

Flashing

Optical signal

received weak *

(Ref to JANUS

instruction manual)

OFF Light curtain occupied

: outputs disabled OFF Light curtain occupied

: outputs disabled

MUTING

OVERRIDE

(Yellow)

Muting

function (or of

Override) active

OFF Normal functioning

* ACTIVE ONLY WITH JANUS LIGHT CURTAIN

16 8540705 • 18/12/2012 • Rev.6

CHARACTERISTICS OF OUTPUT RELAYS

The modules use two guided contacts safety relays (pin 5-6 and 7-8 of CJ6 on

MJB1 and MJB2), (pin 5-6, 7-8 and 9-10 of CJ6 on MJB3 and MJB4), for the output

circuit.

These relays are specified by the manufacturer for voltages and currents greater

than what is indicated in the technical data; nevertheless to guarantee correct

insulation and avoid damage or premature aging, protect each output line with a

3.15 A delayed fuse and verify that the features of the load conform to the

indications on the following table.

MJB1/MJB2 MJB3/MJB4

Number of contacts 2 N.A. 2N.A. - 1N.C.*

Relay category (according to EN60947-5-1) AC15 / DC13

Max commutable voltage 250Vac, 24Vdc

Min commutable voltage 10Vac/10Vdc

Max commutable current 2A

Min commutable current 10mA@24Vdc

Number of commutations (life) > 50 x 103 (el) / > 40 x 106 (mech)

* 1N.C. = DO NOT USE AS A SAFETY CONTACT

SAFETY DATA

FEEDBACK CONNECTION ACTIVE FEEDBACK CONNECTION MISSING

PFHd SFF MTTFd DCavg PFHd SFF MTTFd DCavg

8,16E-09 99,5% 71,02 99,0% tcycle1

AC15

(6A)

4,60E-07 0,50 71,01738 0 tcycle1

AC15

(6A)

6,78E-10 99,5% 851,50 98,9% tcycle2 4,43E-09 0,52 851,5035 0 tcycle2

4,35E-11 99,2% 13442,07 97,6% tcycle3 9,73E-11 0,69 13442,07 0 tcycle3

1,52E-09 99,5% 378,64 99,0% tcycle1 AC15

(2A)

1,86E-08 0,51 378,6359 0 tcycle1 AC15

(2A)

1,28E-10 99,4% 4523,66 98,5% tcycle2 3,62E-10 0,58 4523,66 0 tcycle2

9,14E-12 99,0% 67522,13 91,9% tcycle3 1,74E-11 0,87 67522,13 0 tcycle3

tcycle1: 300s (one commutation every 5 minutes)

tcycle2: 3600s (one commutation every hour)

tcycle3: one commutation every day

(PFHd according to IEC61508, MTTFd and DCavg according to ISO13849-1)

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