Repeat Relays
Technical Specification
Each alarm way can have up to two
individual repeat relays. Changeover contact available. Relay ratings Relay contacts rated at 220VDC (250VAC)max, 125VDC @ 0.5A, 24VDC @ 2A, resistive.
Inputs General
Audible The inputs are all bipolar so can accept ACorDC voltages. Two integral audibles are included which
can be programmed as critical or non-critical horns.Audible 1: 3kHz piezoelectric buzzer at90dB 30cm.Audible 2: 2.5kHz piezoelectric buzzer at80dB 30cm. Supply Voltage Isolation 24VDC Nominal (19-28VDC) Field Contact Voltage Alarm Contacts All customer inputs are optically coupled as
standard and are capable of withstanding
1000V Megger test to ground. This voltage is distributed through the
annunciator to field contacts. As standard
this is selectable between 24 and 125V.As an option a different version, which isselectable between 48 and 250V,is
available. The inputs are all bipolar so can
accept AC or DC voltages. First-up Discrimination Integral Power Supplies The standard unit is suitable for volt-free
contacts, 24 or 125VDC powered inputs.
Each input can be easily set to operate from
either a Normally Open or Normally Closed
field contact. Response Time The response time is software configurable
on each channel from 1ms to 65s. As a
default the system is supplied at 20ms for
all channels. Better than 10ms Universal AC or DC supply 85-264VAC
88-360VDCEach Power Supply Card can power up to40 small windows, 20 medium or 10 large.Additional Power Supplies will be requiredfor systems larger than the above. Pushbuttons Lamp Test System Test Communications (Optional) Both integral and terminals for remote fitting Acknowledge Mute RS485 2 or 4 wire or ethernet.Master and Slave configurations.Supports bi-directional communications.Protocols supported: DNP3, Modbus,IEC60870. Reset First-up ResetIt is not necessary to use the standard
integral Pushbutton Module. If required, theposition normally used for this module canbe fitted with additional alarm windows and
external pushbuttons wired to terminals. Supply Current Per Alarm Point (at 24VDC supply) Quiescent:20mA Window illumination current Small window20mA
Medium window40mA
Large window80mARelays: All window sizes 10mA per relay
Additional current for pushbutton module,common relay and audible is nominally200mA.Standard External Power Supplies and DC/DC Converters can be supplied on
request. Compliance Immunity to EN61000-6-2:2001Emissions to EN61000-6-4:2001
LVD to EN61010-1:1993 Surge Immunity To AMSI/IEEE C37.90:1989
Time Stamping
Environment Resolution 1ms across the whole system up to 256
channels. Operating temperature-20 to 60ºCStorage temperature-20 to 80°C
Humidity0-95% RH, non condensing Accuracy Protection Front of panel: IP41Rear of enclosure: IP20
Optional covers and enclosures to protectfrom IP54 up to IP67
±
0.5millisecond Connections Synchronisation All connections aretwo-part rising clamptype terminals, for conductors up to 2.5mm From GPS Master Clock type 4850
Display
Window Sizes Small:30 x 30mmMedium:60 x 30mm (W x H)Large:60 x 60mm Window Colours Red, Amber, Yellow, White, Green and Blue
Outputs
Illumination Small windowSingle white LEDMedium windowDual white LEDLarge windowFour white LEDsEach
LED is plugged into a base to alloweasy serviceability in case of
LED failure. Common Relays The 725B system is totally flexible in terms
of common relay outputs. Up to 32 relays
can be fitted which can be configured as
group relays, hornrelays, ring-back relays,
diagnostic relays etc.All systems come with a standard fourrelays. one of which will be configured as“watchdog” relay which will trip if any cardfails or thereis any internal system fault.
2 Legends with retaining screws to ensure connectorscannot fall out. Laser printed onto standard acetate sheet,
using templates provided by RTK
Instruments Ltd. Weight Approximately 0.3kg per module
Due to our policy of continuous product development, we reserve the right to amend specifications without notice.
Doc 725B-1
Series 725B Combined Annunciator/Event Recorder - 19514 5
YEAR RTK Instruments Limited St James Business Park,
Knaresborough, North Yorkshire,
England. HG5 8PJTelephone: +44 (0)1423 580500Facsimile:+44 (0)1423 580501
Web: www.rtkinstruments.com
Email: enquiry@rtkinstruments.com GUARANTEE FM14290ISO9001:2000
