3GSTU Subscriber Terminal Unit Installation Guide redcare Helpline: 0800 671 240 …always there
CE MARKING The STU* carries the CE approval marking in accordance with the CE Marking Directive 93/68/EEC.
CONTENTS INTRODUCTION ............................................................................... 4 Scope.............................................................................................. 4 Static Sensitive Devices ...................................................................... 4 Decommissioning Procedure ............................................................... 4 3GSTU OVERVIEW ............................................................................ 6 Specifications .......
INTRODUCTION Scope This document is provided to support professional installation of the BT redcare range of STU products: Model 3GSTU-12V 3GSTU-24V 3GSTU-PLI 11zstu fire stu-24S fire stu-24A fire stu-24C fire stu-24G Description 12 V supply, 8 pin alarms 24 V supply, 8 pin alarms Plug-in 11 Zone, 11 pin alarms 24 V fire stu, 3 pin alarms (Standard build) 24 V fire stu, 3 pin alarms (ADT) 24 V fire stu, 3 pin alarms (Chubb) 24 V fire stu, 3 pin alarms (Gardiner) Part No.
7. Test the system (see page 26).
3GSTU OVERVIEW The 3GSTU is the Public Switched Telephone Network (PSTN) Subscriber Terminal Unit for the BT redcare service. It is available in a number of variants: 3GSTU-12V The 3GSTU-12V variant is a stand-alone unit for mounting inside an alarm panel or auxiliary cabinet. This variant requires a 12 V d.c. supply. And has 8eight pin alarm terminals. The power supply, relay outputs and alarm inputs are connected by means of hard wiring to the terminal blocks on the 3GSTU.
3GSTU-PLI The 3GSTU-PLI variant is a plug-in unit for mounting onto certain alarm panel motherboards. With the exception of the Return Path Signalling, all power supply, output and alarm input connections are made by two connectors that protrude through the base. The 3GSTU-PLI variant will fit the following alarm panels: Scantronic Scantronic Castle Care-Tech Modern Alarms 4700, 9100, 9600, 9800, (9500 II via adapter board). 808, 806, 840I 2300, 2500, 2700, 2900. 3000, 3200, 3400.
Specifications Power supply requirements: 3GSTU-12V, 11zstu Voltage: 10 V DC to 15 V DC Current: 160 mA mean @12 V DC (For standby battery capacity) Ripple/noise: 200 mV p-p max. (40 mA typical, all relays de-energised) Low battery threshold (detected by 3GSTU-12V): 10.8 V ± 0.2 V 3GSTU-24V, fire stu Voltage: 20 V DC to 28 V DC Current: 160 mA max, (40 mA typ, all relays de-energised) Ripple/noise: 200 mV p-p max Low battery threshold (detected by 3GSTU-24x): 22.2 V ± 0.
Safety The circuit board area, under the cover, is classed as a Telecommunication Network Voltage (TNV-3) circuit. All other interconnection points are classed as Safety Extra-Low Voltage (SELV) circuits. It is only necessary for this cover to be removed during installation of the PSTN wiring. The host alarm panel or box into which the STU is installed must provide a RESTRICTED ACCESS LOCATION and a FIRE ENCLOSURE in accordance with the requirements of BS EN 60950.
assumed to have a REN value of 1.0 unless otherwise marked. If the STU is used with an MCD, the combined REN will be 1½. INSTALLATION Training Courses BT redcare offer a free training course for installers of the redcare service. For further information call General Enquiries Tel: 0800 800 828 Pre-Installation Requirements Before a STU installation can commence, a BT redcare Service Order must be submitted to BT redcare by the Alarm Receiving Centre.
Important: THE ALARM SYSTEM MUST BE TOTALLY POWERED DOWN (SWITCH OFF MAINS AND DISCONNECT THE BATTERY) BEFORE INSTALLATION CAN COMMENCE. For certain alarm panels, the 3GSTU-PLI can be directly mounted using the "Plug-in" connections available. Locate it on the two 8-way connectors on the control panel circuit board. Take care to align the pins to the sockets on the board correctly: if they are out of alignment, damage may occur.
The other end of this cable must be connected to a good electrical earth. Failure to fit an earth cable will prevent proper operation of the unit and will invalidate the warranty. Replace the TNV circuit cover and secure in position with the screw. Take the opposite end of the two core telephone cable and strip back both cores so that 5 mm of wire is exposed. Connect both wires to the redcare block terminal. WARNING: the block terminal contains telecommunication network voltages.
Mains Fail If an AC fail signal is provided from the power supply, this can be connected to one of the pin alarm input terminals. For 11 Zone STU connect this to TB1-12, in this case the AC fail alarm will not be indicated on the STU status LED. Tamper If a tamper signal is provided this can be connected to one of the pin alarm input terminals. The tamper alarm can also be generated and sent to the ARC if the STU itself detects a tamper, such as the removal of the NVM.
Alarm Inputs For plug-in units, connections to the alarm panel are made by the two connectors which protrude through the base. When fitting the unit, check that SK1 pins 1 to 8 and SK2 pins 9 to 16 correspond to pins 1 to 8 and 9 to 16 on the alarm panel.
11 and AC Fail are made to terminals marked 9 though 12 of TB1 respectively. The connections are made in exactly the same way as for alarm inputs 1 to 8. For panels which provide relay contact outputs, the common of each relay should be connected to an A+ terminal (TB2) on the STU. Either the normally open or normally closed contact should be connected to the relevant STU alarm input (TB1).
To use the RPS function, one of the alarm inputs must be designated as an opening/closing channel (usually channel 4). The RPS output will activate when an opening or closing signal is detected. It will de-activate when the opening or closing signal has been acknowledged by the Alarm Receiving Centre. It is allowable to have more than one input designated as an opening/closing channel, but each must be acknowledged to de-activate the RPS output.
The STU provides two different modes of local line monitoring, which can be selected when the NVM is programmed. The ARC must be notified if local line monitoring is to be enabled, and if so, which mode is required. For STUs connected to normal phone lines, ‘PSTN mode’ should be used. This mode monitors the DC line voltage and triggers the Line Fault output within 100 seconds of a line break. For STUs connected to private wires (RedDIRECT), ‘Private Wire mode’ should be used.
Pin Alarm Polarity The pin alarm channels respond to the voltage level at the terminal block inputs (stand-alone mode) or the pins of SK1 and SK2 (plug-in mode). The appropriate terminal block inputs and plug-in connector socket pins are tracked together in parallel on the circuit board. Each channel can be programmed to be "Positive Applied" or "Positive Removed". This polarity is set in the NVM.
Input 9 10 11 AC Fail Switch 1 2 3 4 5 6 7 8 Off Negative Applied Disabled Negative Applied Disabled Negative Applied Disabled Negative Applied Disabled On Positive Applied Enabled Positive Applied Enabled Positive Applied Enabled Positive Applied Enabled Remote Programming Once installed, the NVM can be re-programmed remotely by the ARC. Only the relay states can be adjusted unless a technician is on-site to set the STU into Secure Access Mode using LK3.
V1.
Press in sequence: A 3 2 D The address display changes to: 0032 If the Control Relay is to be energised on power up press ……………………………….. 1 or If the Control Relay is to be not energised on power up press ……. 0 If the Line Fault Relay is to be energised when the landline has failed, press ……………… 1 If it is to be not energised when the landline has failed, press …………………………………… Press…. YES or 0 to advance the address display to: 0033 If the Telephone Line Type is PSTN press ….
YES Press…….. to advance the address display to: 0034 0 For all variants Press ……………. A Press in sequence: 4 7 D The address display changes to: 0047 Key in the first two digits of the hard ID, press yes and key in the final two digits.
Pressing the numbered key changes the setting of the polarity from 0 to 1, or 1 to 0. A state of 1 means positive applied and a state of 0 means positive removed. A Press in sequence: 6 6 B The address display changes to: 0066 Use keys 1 to 8 to select the pins that are opening/closing channels. A state of 1 means that the alarm pin is an opening/closing channel a state of 0 means that it is not an opening/closing channel.
STATUS INDICATORS LED 1 (green) 2 (red) Indication STU Status 1 STU Status 2 Normal state Intermittent flash Off Key to LED flash rates: Slow About 21/2 s on, 21/2 s off. Fast About 1/3 s on, 1/3 s off. Flutter About 12 flashes per second. Intermittent One or more flashes about 1/3 s on and then off for more than 21/2 s.
STU Status LED Meanings The status of the 3GSTU is indicated on the LEDs in priority order - highest first. Where a high priority condition exists, it is indicated on the LED and suppresses the indication of lower priority conditions. For example, if a battery low condition is present, battery low is indicated on the red LED regardless of the state of AC Fail. Green flutter flash for 2/3 s: Transmitting or receiving alarm data over landline (chirp). Green fast flash: Battery power is low.
During the commissioning procedure, the STU will be "upped" on the landline. Call the ARC, preferably using the same line as the STU, and ask them to commission the system ("Up the STU"). You will hear a short series of ‘chirps’ on the line. The green STU Status LED will give a short flutter each time a landline message, heard as a "chirp", is sent or received. When the ARC confirms that the system is commissioned the green STU Status LED should flash every 5 seconds.
a) Disconnect the STU from the telephone line (both A and B connections). b) If the STU is connected to the PSTN, the Line Fault output will activate within 100 s. c) If the STU is connected to a Private Wire (redirect) or a PSTN earth calling line, the Line Fault output will activate within three minutes. d) Reconnect the telephone line and verify that the Line Fault relay is deactivated.
TROUBLESHOOTING This section describes typical problems that may arise, the symptoms, possible causes and solutions. If you have problems that you cannot resolve after consulting this section, please contact BT redcare Technical Helpline Freephone: 0800 671 240. Chirps The redcare system utilises an existing telephone line to provide a secure communications link between the alarm system at the protected premises and the ARC.
Line Type PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PSTN PW PW PW PW PW PW PW PW Earth Calling Line No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes n/a n/a n/a n/a n/a n/a n/a n/a On Hook Atten. 0 dB 0 dB 0 dB 0 dB -3 dB -3 dB -3 dB -6 dB -6 dB -9 dB 0 dB 0 dB 0 dB 0 dB -3 dB -3 dB -3 dB -6 dB -6 dB -9 dB 0 dB 0 dB -3 dB -3 dB -6 dB -6 dB -9 dB -9 dB Off Hook Atten.
Symptom Red STU Status LED Fast flash. When an alarm is triggered the number of outstanding alarms does NOT increase. The red STU Status LED is off or the number of flashes of the red LED stays the same. The green STU Status LED intermittent flash. The red STU Status LED flashes up to eight times after every other flash of the green STU Status LED. Green STU Status LED fast flash. Possible Causes Problems indicated on a) NVM not fitted. b) NVM unprogrammed. c) NVM wrong way around.
Symptom ARC cannot commission the STU, and the phone line is otherwise OK. Green and red Status LEDs slow flash. ARC is reporting NO RESPONSE and chirps can be heard on the phone line. Green and red STU Status LED slow flash. ARC is reporting NO RESPONSE and chirps CANNOT be heard on the phone line. (Green STU Status LED slow flash.) Possible Causes a) STU is not enabled by BT Redcare. b) Wrong phone line being used. c) Wrong STU commissioned by the ARC.
Symptom The ARC is reporting the receipt of a channel 14 alarm. No activity on the STU, no LEDs on. Regular ‘chirps’ are heard (every 2½ to 3 minutes) whenever the telephone is in use. Calls cannot be made from the STU phone line. The ARC is reporting the receipt of a channel 15 alarm. Possible Causes This is an internal alarm generated by the STU to indicate a battery low condition. Possible Solution Possible mains failure or faulty battery. The power is off.
Offices worldwide The telecommunications services described in this publication are subject to availability and may be modified from time to time. Services and equipment are provided subject to British Telecommunications plc’s respective standard conditions of contract. Nothing in this publication forms any part of any contract. © 2004 British Telecommunications plc.
