SRG535_DS_T800464_en

Data sheet

SECURITON AG Alpenstrasse 20 CH - 3052 Zollikofen Switzerland T 800464 1 / 15

MHD 535 Stand-alone Response Generator SRG 535

The mode of operation of the MHD 535 is based on the collection of data of a large number of sensors which are integrated in the sensor cable at regular intervals, and central analysis of this data. The sensor values correspond to the temperature at the sensor's location. These temperature values are transferred to the Processor Unit PU via the cable and read in there. The Processor Unit PU contains various files with logic equations and programming instructions, which define how the read-in temperature values should be handled. This list of instructions is written in binary format. It defines under which conditions the system responds and the type of response. During operation the Processor Unit PU scans the sensors integrated in the sensor cable and interprets the list of instructions from the Processor Unit PU file. The sensor cable MHD 535 is connected to the analysis unit and analyzed. Connection can be made directly via flat-ribbon connectors, or via a standardized connecting cable CCA 535. To cope with increased electromagnetic interference (EMI), a Protection Filter Module PFM 535 (connection module with lightning protection) is attached to the sensor cable - in front of the first sensor. If the sensor cable is connected directly to the Processor Unit PU, the Protection Filter Module PFM 535 is integrated in the Processor Unit PU. If connection is made via a connecting cable, the Protection Filter Module PFM 535 is integrated as a connection point to the sensor cable. An Earth Connection Box ECB 535 (mandatory for fire protection applications which satisfy VdS guidelines) can be used between the Protection Filter Module PFM 535 and the Processor Unit PU. A Connection and Filter Module CFM 535 is used to connect individual sensor cable sections. A Cable Terminator Module CTM 535 is used at the end of the sensor cable. If the temperature response values defined in the Processor Unit PU are exceeded, the triggered state is transmitted to a superordinate control system by means of a potential-free changeover contact. The Relay Control Unit RCU 535 is used to drive relays with a potential-free changeover contact. Groups can also be formed.

Figure 1: General operating principle

Data sheet

2 / 15 T 800464 MHD535

Processor Unit PU

Cable Terminator Module CTM 535

Relay Control Unit RCU 535

Connecting cable CCA 535

Earth Connection Box ECB 535

Laptop

Protection Filter Module PFM 535

Control system / AS

Sensor Separator Module SSM 535

Sensor cable MHD 535

Connection and Filter Module CFM 535

Various accessories such as cable mounting clips CMC 511A are not listed

The following table shows the various types of Processor Unit PU and their options.

Stand-alone Signal Processor SSP 535

Stand-alone Response Generator SRG 535

Remote Signal Processor RSP 535

Remote eXtended Generator RXG 535

Remote Response Generator RRG 535

Remote System Server RSS 535

Remote Access Point RAP 535

Sensor cable

RS422 / ModBus Interface MBI 535-x

Common alarm

Fault Tolerant Network FT-NET

Common fault

Dual sided supply

8 group relays

System Base Module SBM

Connection to Relay Control Unit RCU 535

Input-Output Module IOM

RS232

Data sheet

MHD535 T 800464 3 / 15

Description of the Stand-alone Response Generator SRG 535

The Stand-alone Response Generator SRG 535 is a Processor Unit PU supporting:

Sensor cable

Common alarm relay

Common fault relay

8 group relays

Connection to a Relay Control Unit RCU 535

RS232 interface

RS422 / ModBus Interface MBI 535-x

Construction of the Stand-alone Response Generator SRG 535

The Stand-alone Response Generator SRG 535 comprises a plastic enclosure containing the electronic components. The enclosure features a number of cable entries for inserting the sensor cable and the electrical connecting cable.

Figure 2: Construction of the Stand-alone Response Generator SRG 535

Data sheet

4 / 15 T 800464 MHD535

Connecting cable

Relay

Sensor cable

Connection to external RCU 535 (shield)

Compact Flash connector

Inputs

Jumper connector

DIL switch

ModBus option

MHD 535 Cable entry

RS232 interface

Cable entry for connection to external RCU 535

RS422 interface

Power supply and relay cable entry

Alarm and fault relay

Relay cable entry

Power supply and reset

Communication cable entry

Connection to external RCU 535

Mounting the Stand-alone Response Generator SRG 535

Mounting position of the Stand-alone Response Generator SRG 535 The Stand-alone Response Generator SRG 535 can generally be mounted on the X or Y axis. Vertical mounting is preferable. Mounting on the Z axis is not permissible.

Safety Notice

Other mounting positions are only allowed in exceptional cases and after consultation with the manufacturer.

Data sheet

MHD535 T 800464 5 / 15

Figure 3: Drilling plan of the Stand-alone Response Generator SRG 535

Selecting the location for the Stand-alone Response Generator SRG 535 The location should be an easily accessible site which does not require the use of tools (ladder, scaffolding) when working on the Stand-alone Response Generator SRG 535. In applications in an alarm system it is recommended to install the Processor Unit PU in a lockable protective cabinet (with a glass door).

Notice

The Stand-alone Response Generator SRG 535 may not be exposed to direct sunlight.

The Stand-alone Response Generator SRG 535 should be located in an area with a normal ambient temperature (-25

... + 50 C).

Fastening the Stand-alone Response Generator SRG 535 The Stand-alone Response Generator SRG 535 is fastened using 4 screws. A minimum distance of 15 cm from parts on site (control cabinets, alcoves etc.) should be kept on the entry side of the sensor cable.

Data sheet

6 / 15 T 800464 MHD535

Technical specifications of the Stand-alone Response Generator SRG 535

Figure 4: Dimensional drawing of the Stand-alone Response Generator SRG 535

PU Type Parameter Values Remark

SRG 535 Operating voltage U +10 ... +36 VDC

Power consumption max.

approx. 220 - 4 x U mA Rest

approx. 220 - 4 x U mA Fault

approx. 230 - 4 x U mA Alarm

approx. 330 - 0.6 x U mA all relays triggered

Max. sensor cable length 200 / 1000 / 1750 / 2000 / 2000 m depending on the sensor distance

Max. number of sensors 250 Qty.

Max. length of connecting cable CCA 535

200 m SABIX D315 FRNC

Response range MHD 535 EN 54 Part 5, class A1 to C

Protection class IP65 in accordance with IEC 529 / EN 60529 (1991)

Data sheet

MHD535 T 800464 7 / 15

Ambient conditions 3K5 / 3Z1 in accordance with IEC 721-3-3 / EN 60721-3-3 (1995)

Temperature range -25 ... +85 C

Ambient condition humidity

95 % rel. hum. for a short time without condensation

70 % rel. hum. constant

Max. load of relay contact 250 V / 6A

Inputs +10 ... +36 VDC

Terminals 2.5 mm2 maximum

Terminals relay contacts 1.5 mm2

Ground terminal 4 mm2

Cable entry

1 x seal insert MHD 535FX

1 x seal insert MHD 535SD

1 x seal insert MHD 535HD

Sensor cable

1 x seal insert 8 - 5 mm Connecting cable

1 x seal insert 8 - 5 mm Communication RCU 535

4 x seal inserts 10.5 -7 mm general

Material of enclosure Polycarbonate

Approval VdS EN54

Dimensions 159 x 294 x 90 mm incl. cable entries

Weight approx. 1.30 g

Notice

Power consumption for maximum permissible voltage drop in the electrical installation (decisive value for

calculating the conductor cross-section).

The values in the technical specifications relating to maximum cable length may be higher or lower from case to

case. In borderline cases, the manufacturer of the MHD 535 must therefore perform an accurate calculation of

the limit data.

Danger

Prior to the implementation and commissioning of an installation, the technical documentation T800469 must be

observed.

Data sheet

8 / 15 T 800464 MHD535

Interconnection principle

The interconnection principle of all MHD 535 components is shown in the following diagram:

Figure 5: General operating principle

Processor Unit PU


Relay Control Unit RCU 535

Connecting cable CCA 535

Earth Connection Box ECB 535

Laptop

Protection Filter Module PFM 535

Control system / AS

Sensor Separator Module SSM 535

Sensor cable MHD 535


Various accessories such as cable mounting clips CMC 511A

Data sheet

MHD535 T 800464 9 / 15

Grounding and shielding concept

If not laid properly, the sensor cable MHD 535 may act as an antenna, which may lead to malfunctions as a result of electromagnetic radiation. In extreme cases, this may result in the destruction of the sensor cable MHD 535. The positioning of the sensor cable in relation to any electromagnetic sources of interference is therefore very important. Attention should be paid in particular to inductive and capacitive couplings. Inductive coupling may arise if the installation of the sensor cable forms a loop (see next diagram), or if the sensor cable or connecting cable is laid in parallel to other live cables over long stretches.

Figure 6: Inductive coupling

Processor Unit PU


Earth Connecting Box ECB 535


Protection and Filter Module PFM 535

Antenna with inductive coupling

Please note that the antenna formed by the loop has a sensitivity that is proportional to its surface. In addition, the parasitic coupling capacitances of the connecting cables to ground cause the loop to be closed for high frequencies. A second coupling path arises in running sensor cables in parallel to other cables in which high currents are circulating. In this case the coupling is proportional:

to the (alternating) current intensity,

to the frequency of the alternating currents and

to the distance over which the conductors are routed in parallel.

It is inversely proportional to the distance of the sensor cable (or connecting cable). The best means of protection in these cases is therefore to lay the cables at a sufficient distance from each other. Experience has shown that 60 cm is an adequate distance.

Data sheet

10 / 15 T 800464 MHD535

Danger

Loop formations as shown in the previous diagram should be avoided.

Running the sensor cable and connecting cable in parallel with live installation cables - particularly over long

sections - should be avoided. If this is not possible, a minimum distance of 20 cm should be maintained.

In extreme cases it may be possible to place the connecting cable inside a metal protective tube, which is

connected to a compensation potential (after consultation with the manufacturer) on the Processor Unit PU side.

If reduced availability of the sensor cable arises during commissioning (sampling error, increased standard

deviation of the temperature values), then other/additional potential equalization measures as described in the

chapter "Shielding P. 11" may be required (after consultation with the manufacturer).

All these circumstances will be taken into account if the grounding and shielding concept described below is adhered to and normally the functioning of the sensor cable will not be impaired.

Potential equalization (grounding)

The Processor Unit PU should be connected to the potential equalization via the external grounding terminal on the enclosure. The connection point of the potential equalization is located in the cabinet housing the Processor Unit PU. It is usually identical to the grounding of the control unit. The potential equalization within the room containing the Processor Unit PU - or the entire object - must be executed correctly. In particular, different ground potentials via which equalizing currents can flow may not arise.

Data sheet

MHD535 T 800464 11 / 15

Shielding

When the sensor cable MHD 535 is connected to the Processor Unit PU via a connecting cable CCA 535, the shielding of the connecting cable must connected as shown in the following example.

Figure 7: Shielding concept- variant I

Processor Unit PU

Connection and Filter Module CFM 535 / Sensor Separator Module SSM 535

Earth Connecting Box ECB 535


Protection and Filter Module PFM 535

External supply

Safety Notice

The shielding must be insulated (heat shrink tube) to prevent short circuits.

Data sheet

12 / 15 T 800464 MHD535

If there is a risk of lightning strikes, the grounding connection should be made in accordance with one of the following variants. This entails removing the insulation of the connecting cable in order that the shield is connected directly to ground.

Figure 8: Shielding concept- variant II

The result of this is that the strong currents that arise as a result of a lightning strike are directly diverted to ground, and do not flow through the

device Processor Unit PU .

If the ground connection is made in this manner, you are advised not to connect the grounding terminal of the Processor Unit PU , as otherwise a loop could form. The connecting cable should be connected using a low-impedance connection, where the connecting cable between the Earth Connecting Box ECB 535 and the Processor Unit PU must be kept as short as possible.

Data sheet

MHD535 T 800464 13 / 15

For further information see also the chapter "Connection overview P. 13"

Connection overview

An overview of the connection of the various devices can be seen in the tables below.

Conductor Processor Unit PU Earth Connecting Box ECB 535 Sensor cable module

Shield Tm 0 Tm 0

pink Tm 1 Tm 1 Tm 0

blue Tm 2 Tm 2 Tm 1

white Tm 3 Tm 3 Tm 2

gray Tm 4 Tm 4 Tm 3

green Tm 5 Tm 5 Tm 4

yellow Tm 6 Tm 6 Tm 5

brown Tm 7 Tm 7 Tm 6

Table 1: Overview of connection of connecting cable

Conductor Processor Unit PU Earth Connecting Box ECB 535 Sensor cable module

Shield Tm 0/1 Banana connector Banana connector

Flat-ribbon cable Flat-ribbon connector Flat-ribbon connector Flat-ribbon connector

Table 2: Overview of connection of sensor cable

Operation

Operation of the MHD 535 in normal mode (after commissioning) is restricted to switching on/off or resetting a triggered event (alarm/fault). Triggered events at the Processor Unit PU can be reset on site by briefly activating the "Reset" input (for at least 3 seconds). Further operations can be carried out using a notebook with the PC tool MHD-Config. The exact procedure is not covered in this documentation (for details see the Help function in the PC tool MHD-Config).

Configuration

The configuration steps of the Processor Unit PU are described in the technical documentation T800469.

Data sheet

14 / 15 T 800464 MHD535

Display elements

Figure 9: View of the display elements at the Processor Unit PU

Further display elements can be found in the Relay Control Unit RCU 535. A red LED which displays the triggered state is set up for each relay.

Reset

The Processor Unit PU can be reset following a triggered event by

a brief interruption of the supply voltage of the Processor Unit PU Warning: See the following hazard warning

briefly activating the "Reset" input (for at least 3 seconds) on the Processor Unit PU on site, or

via the PC tool MHD-Config using a notebook

.

Danger

Resetting an event via the supply voltage (cold start):

When performing a reset by briefly interrupting the supply voltage please ensure a waiting time of a minimum

of 60 seconds between the occurrence of the event and the interruption of the power supply. This ensures that

the system can back up all files correctly and also that at least 3 temperature scans can be recorded after the

event (consequences of alarm).

The reset time (interruption time) should be at least 5 seconds.

Notice

Onsite reset ("Reset" input, from a notebook) does not cause a superordinate control system to be reset. The

reset operation in the MHD 535 may cause the superordinate line of the control system to trigger a fault.

Data sheet

MHD535 T 800464 15 / 15 Revision: 11/05/09 vb The product specifications contained in this document are subject to change without notice. Copyright by Securiton

Display

Three LEDs on the Processor Unit PU indicate the current state of the Processor Unit PU as follows:

Function "Power" (green) "Fault" (yellow) "Alarm" (red)

System off off off off

Startup procedure flashes (10Hz) on off

Reset procedure flashes (10Hz) on off

Full shutdown on on off

Partial shutdown flashes (1 Hz) on off

Normal operation on off off

Fault triggered on on off

Alarm on off on

Item numbers of Processor Unit PU

Brief description Type Item number

Stand-alone Signal Processor SSP 535 Rev G. MSSP00R0PCAGRST2

Stand-alone Signal Processor SSP 535 with internal PFM 535 Rev G. MSSP10R0PCAGRST2

Stand-alone Response Generator SRG 535 Rev G. MSRG00R0PCAGRST2

Stand-alone Response Generator SRG 535 with internal PFM 535 Rev G. MSRG10R0PCAGRST2

Remote Signal Processor RSP 535 Rev G. MRSP00R0PCAGRST2

Remote Signal Processor RSP 535 with internal PFM 535 Rev G. MRSP10R0PCAGRST2

Remote eXtended Generator RXG 535 Rev G. MRXG00R0PCAGRST2

Remote eXtended Generator RXG 535 with internal PFM 535 Rev G. MRXG10R0PCAGRST2

Remote Response Generator RRG 535 MRRG0000PCAGRST2

Remote System Server RSS 535 MRSS0000PCAGRST2

Remote Access Point RAP 535 MRAP0000PCAGRST2

Relay Control Unit RCU 535 MRCU0000PCAGRST2

Main board SBM Ask manufacturer

Main board IOM Ask manufacturer

Documents

SRG535_DS_T800464_en