Kentec DNP-R-2F-FC-K Passive Dual Port Optic Fibre RS485 Medium Converter User Manual

Kentec DNP-R-2F-FC-K Passive Dual Port Optic Fibre RS485 Medium Converter

Safety

Prior to installation:

• Read this manual completely and gather all information on the unit.
• Ensure that your application does not exceed the safe operating specifications for this unit.
• This unit should only be installed by qualified personnel.
• This unit should be built into an apparatus cabinet, or similar, where access is restricted to service personnel only.
• The power supply wiring must be sufficiently fused, and if necessary, it must be possible to disconnect manually from the power supply. Ensure compliance to national installation regulations.
• This unit uses convection cooling. Avoid obstructing the airflow around the unit.

Before mounting, using or removing this unit:
Prevent access to hazardous voltages by disconnecting the unit from the power supply. Warning! Do not open a connected unit. Hazardous voltages may occur within this unit when connected to a power supply.

Care recommendations

• Follow the care recommendations below to maintain full operation of the unit and to fulfil the warranty obligations.
• This unit must not be operated with the cover removed.
• Do not attempt to disassemble the unit. There are no user serviceable parts inside. Do not drop, knock or shake the unit. Rough handling beyond the specification may cause damage to internal circuit boards.
• Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit. Do not paint the unit. Paint can clog the unit and prevent proper operation.
• Do not expose the unit to any kind of liquids (rain, beverages etc). The unit is not waterproof. Keep the unit within the specified humidity levels.
• Do not use or store the unit in dusty, dirty areas. Connectors as well as other mechanical parts may be damaged.
• If the unit is not working properly, contact the place of purchase, nearest Kentec distributor office, or Kentec Tech support.

Maintenance
No maintenance is required, as long as the unit is used as intended within the specified conditions.

Agency approvals and standards compliance

Ratings

Safety Control Drawing

MBd. Fibre drive distance:

M: Multi-mode – up to 2km

S: Single-mode – 10 / 15 / 20 / 40 / 80km variants

M: 850nm / 1310nm S: 1310 / 1550nm

BiDi: 1310 & 1550nm

2| TX – LC connector interface for fibre – PORT B
3| RX – LC connector interface for fibre – PORT C
4| TX – LC connector interface for fibre – PORT C
5| Screen/Shield RS-485 – PORT B or C| ****

Umax = ± 5Vpk Imax = ± 60 mA Data rate:

4.8 to 115.2 kbit/s

6| In / Out / + line RS-485 – PORT B or C
7| In / Out / – line RS-485 – PORT B or C
8| Screen/Shield RS-485 – PORT A1 (Panel IN Port)
9| In / Out / + line RS-485 – PORT A1 (Panel IN Port)
10| In / Out / – line RS-485 – PORT A1 (Panel IN Port)
11| Screen/Shield RS-485 – PORT A2 (Panel OUT Port)
12| In / Out / + line RS-485 – PORT A2 (Panel OUT Port)
13| In / Out / – line RS-485 – PORT A2 (Panel OUT Port)

Uin = (18 –36): 24 VDC Nominal Iin = 210 mA Rated at 24 VDC

2| In / Common
3| In / +Voltage B
4| In / Common
5| Earth connection
6| In & out / Relay contact (C – Common)| Uin = 30 VDC max

Iin = 2000 mA max, Pin = 60 W max

7| In & out / Relay contact (NC – Normally Closed)
8| In / Out / – line RS-485 – IO Interface| Umax = ± 5Vpk

Imax = ± 60 mA Data rate:

9| In / Out / + line RS-485 – IO Interface
10| Screen/Shield RS-485 – IO Interface

Functional description

The DNP R-2F/FC are network nodes that support intelligent infrastructure monitoring of the hybrid and Optic Fibre network bus with RS-485 CIE interface ports A1 and A2.

Figure 2: Design Structure Diagram

• The DNP R-2F/FC functions as a PASSIVE dual port Optic Fibre / RS-485 medium converter.
• The DNP R-2F/FC can operate in a mode with two optic fibre interfaces (2F) located on ports B and C and also in a mode with a single optic fibre interface and an RS-485 interface (FC or CF).
• In hybrid mode (FC /CF) the optic fibre interface on the DNP R-2F/FC can be configured as either port B or C by selecting the correct rotary switch setting as per Table 10. When used to support an optic fibre link in a class A bus configuration, one of the
• DNP R-2FC modules would require a port swap to support the standard port B to C connection format around the closed ring. An example of this is illustrated in Figure 10b.
• When using as a 2F module, the two Optic Fibre ports (B & C) are connected as per Figure 10a.
• Depending on the driver module selected, the Optic Fibre, transceiver modules can support transmission distances up to 80 km. The CIE connection to port A1 and/or A2 is via an RS-485 interface. The connection to ports A1, A2, B and C are as indicated in Figures 10a and 10b, depending on the mode of operation.
• The module supports 2-wire half duplex communication from CIE nodes (RS-485). The INS modules are transparent to the CIE protocols, only routing and analysing the data structure but not the content. The maximum standard transmission rate supported on the CIE ports (A1 and A2) is 115.2 kbit/s for RS-485. (Higher transmission rates are possible with OEM support).

Interface specifications

Power

Rated voltage| 18 to 36 VDC
Operating voltage| 17 to 42 VDC
Rated current| 170 mA @ 24 VDC
Rated frequency| DC
Polarity| Reverse polarity protection
Connection| Detachable screw terminal
Connection size| 0.2 – 2.5 mm2 (AWG 24-12)
RS485 Port A1, A2 & B/C – DNX R-2FC

Electrical specification| RS-485 / ARCNET
Data rate| 4.8 kbit/s – 312 kbit/s (as per selection in table)
Data format| 7 or 8 Data bits; Odd, Even or None parity; 1 or 2 Stop bits (RS-485)
Connection| Detachable screw terminal
Connector size| 0.2 – 2.5 mm2 (AWG 24-12)
Transmission range| In accordance with EIA RS-485

≤ 1200 m, depending on data rate and cable type

RS-485 Termination settings| IN/OUT Switchable termination (Manual via DIP switch 2)
RS-485 Failsafe setting| Failsafe biasing 820 Ω
Protection| Installation Fault Tolerant (up to ± 44 V)
Optic Fibre Port B & C

Electrical specification| LC Type – Optic Fibre connectors
Data rate| 100 Mb/s –125 MBd.
Data format| Proprietary format
Connection| LC Type – Optic Fibre connectors
Connector description| LC type – push-pull latching mechanism
Fibre cable type| 3.0mm jacketed or 900µm buffered

Transmission range

| Multi-mode – M: 1 to 2 km, Single-mode – S: 1 to 15km,

Single-mode – L: 1 to 40 km, depending on losses due to in-line connectors, splices and optical switches

USB (Not used in DNP R-2F/FC)

Electrical specification| USB version 2.0
Data rate| Full speed device mode as per USB 2.0 specification
Data format| As per USB specification
Connector type| USB micro B (device) – cable type micro B required
Implementation mode| Slave
Protection| Transient voltage protection

Locations of Interface ports, LEDs and DIP-switches

LED Indicators

LEDs are used to indicate the Router Mode State

Q &S LED C2/ Q &S LED B2| |
Q &S LED C3/ Q &S LED B3| |
Port B TX| ON| Green| A good data packet has been transmitted out of port B
OFF| | No valid data has been transmitted out of port B
Port B RX| ON| Green| A good data packet has been received on port B
OFF| | No valid data has been received on port B

TERM B

Port B side of Link established

| ****

ON

| ****

Green

| In mode 2: Port B has successfully established and validated healthy communication across the link to a remote port C terminal.

OFF

| | In mode 2: Port B has failed to successfully establish and validate healthy communication across the link to a remote port C terminal.
Port C TX| ON| Green| A good data packet has been transmitted out of port C
OFF| | No valid data has been transmitted out of port C
Port C RX| ON| Green| A good data packet has been received on port C
OFF| | No valid data has been received on port C

TERM C

Port C side of Link established

| ****

ON

| ****

Green

| In mode 2: Port C has successfully established and validated healthy communication across the link to a remote port B terminal.
OFF| | In mode 2: Port C has failed to successfully establish and validate healthy communication across the link to a remote port B terminal.
Port A TX| ON| Green| A good data packet has been transmitted out of port A1 or A2
OFF| | No valid data has been transmitted out of port A1 or A2
Port A RX| ON| Green| A good data packet has been received on port A1 or A2
OFF| | No valid data has been received on port A1 or A2

Status port B

| ON| Green| The link connected to port B is HEALTHY with data activity.
Amber| There is a FAULT present on the link connected to port B.
OFF| | There is NO fault on port B, but INSUFFICIENT DATA activity.

FLASH

| Amber| There is a signal QUALITY FAULT present on the link connected to port B.
Green| Port B is in a state of establishing the link

Status port C

| ON| Green| The link connected to port C is HEALTHY with data activity.
Amber| There is a FAULT present on the link connected to port C.
OFF| | There is NO fault on port C, but INSUFFICIENT DATA activity.

FLASH

| Amber| There is a signal QUALITY FAULT present on the link connected to port C.
Green| Port C is in a state of establishing the link

Power supply 1

| ON| ****

Green

| Power supply 1 is HEALTHY
---|---|---|---
OFF| CPLD has failed [OR] if Fault LED is Flashing PSU1 has failed
FLASH| CPLD Heartbeat
Power supply 2| ON| Green| Power supply is HEALTHY
OFF

SFP signing

All of the supplied SFP transceivers are signed to mark calibration with the
DNP R-2F/FC product and any non-signed transceivers must NOT be used with the DNP R-2F/FC.

Any use of SFP transceivers with the product will void the warranty on the product as it will affect the operation of the product.

DIP-switch settings

Before accessing the internal DIP-switch and jumper settings:
Prevent damage to internal electronics from electrostatic discharges (ESD) by discharging your body to a grounding point (e.g. use of a wrist strap). For internal DIP SWITCH setting information, refer to the DNP R-2F/FC Advanced User Manual.

The configuration setting for use with Kentec fire alarm panels has been simplified so that you only need to set Rotary switch (Rot SW 1) for the DNP R-2F/FC, (refer to Figure 4) which is externally accessible. You should therefore not need to open the product enclosure. The settings as presented in Tables 10.
All modems are shipped with the 120 Ohm termination jumpers (120Ω JMP) inserted to introduce a standard 120 Ohm termination on the RS-485 ports.
**Note*** The Kentec Fire Alarm Panels require the 120 Ohm jumpers to be inserted.

Switch settings for DNP R-2F/FC operation

Rotary selector switch settings for communication configuration
The rotary selector switch, located on the DNP R-2F/FC as shown in Figure 5, has the setting associations shown in Table 10.

Unit specific description

Signal propagation delay and jitter

Many CIE (e.g. Fire panel) only offer tight timing requirements for supporting a class A redundant ring application. With the introduction of third-party equipment into an OEM redundant transmission path, additional signal delays and jitter are often introduced with the original CIEs no longer able to function as required. The DNP R-2F/FC modules are designed to support extended signal delays and jitter. When used with the installed CIEs, these modules can provide a functional class A redundant solution that is tolerant of most delays and jitter.
The LED indicators show the status of the data signals. The optic fibre module provides a “signal detect” function that monitors the link connection dynamically, ensuring that the signal level at the receiver is within the required specification for good communication. These signals are monitored and recorded to track transmission path performance drift.

Configuration and Installation

The DNP R-2F/FC modules only support passive mode routing.
All communication settings are configured using the rotary switch. Set for the respective fire alarm panel by setting the Rotary switch 1 in Table 10.

Field applications

BiDi SFP Transceivers (Bi-directional transceivers)
The DNP R-2F/FC can also be used to convert a dual fibre radial link to a redundant dual path as per Figure 13 by using the BiDi SFP transceivers. The BiDi transceivers use two frequencies for Tx and Rx on each fibre to carry the Tx and Rx signals on a single fibre. This application is useful for the following:

• converting a radial system to a redundant ring on the existing fibre
• introducing a temporary solution when a single fibre fails on a link.

RS-485 cable screen connection with the DNP R-2F/FC used in hybrid medium mode
When the DNP R-2F/FC is used in hybrid medium mode, the screen on the metallic conductor (cable) needs to be earthed on one of the two sides to provide a path to ground any coupled signal interference. With both sides grounded, an unwanted path for circulating currents is introduced. This single point grounding is displayed in Figure 7.

Mixed Optic Fibre cable types (e.g. Single Mode and Multi-mode)
The DNP R-2F/FC supports a network that has mixed cable types by selecting the correct SFP transceiver for the cable to which it is connected.
Transceiver types supported:

• Multi-mode (MM)
• Single Mode (SM)
• Bi-directional (BiDi)

The transceivers are supplied with a range of drive capabilities. (e.g. 550m, 2km, 10 km, 20 km, 40km, 80km etc.)

Redundant Power Supply

The DNP R-2F/FC module supports dual power supplies with an automated switchover. The typical configuration for connecting auxiliary and backup battery power supplies is illustrated in Figure 9.

About the interfaces

Power terminal
The power terminal has two independent inputs, +Voltage A and +Voltage B. These have been included to support redundancy should either of the two fail.

RS-485 interface
Two connectors with three-position detachable screw terminals support the connections for the 4 port 2 wire RS-485 system.

Optic Fibre interface

A pair of LC type connectors support the optic fibre interfaces.
Earth terminal
The earth terminal provides a surge path for transients on the Port A circuit.

Mounting
This unit should be mounted on 35 mm DIN-rail, which is horizontally mounted inside an apparatus cabinet, or similar.
The mounting is of the “snap on” type.

Referring documents
Information relating to specific application of this device can be found in the following application notes.

502-DNARBIE0-A-01
Application Note| Network Bridge Redundancy with DNA R-1 & DNA R-2| 502-DNARBIE1-A-01

Wiring connections

Figure 10a and 10b illustrates the wiring connections for the DNP R-2F/FC modules. Note: The port connections must have Port B connected to Port C as presented in the diagram.

SFP Transceivers

The SFP transceivers used with the DNX R-2F/FC product are presented in Figure 11.

References

• Home - Kentec Electronics Ltd
• Home - Kentec Electronics Ltd

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