RF SOLUTIONS FOBOEM-4S4 Manual de usuario

FOBOEM Telemetry system

DS-FOBOEM-2

Applications

• Remote control

• I/O Telemetry devices

• Remote switching

• Remote traffic lights

Part No Description

FOBOEM-4S4 4 Switch Fob, SMT ZPT Receiver module with pins Bundled 433MHz

FOBOEM-8S4 4 Switch Fob, SMT ZPT Receiver module with pins Bundled 868MHz

Features

• Easy Embedded Remote Control

• 4 digital outputs

• Serial Data output

• Minimal external components

• Secure data protocol

• Ultra low power 1.8—3.6V

• Easy pairing process

• -121dBm Receive Sensitivity

• Range when used with:

• FOBBER Keyfob up to 200metres

• TRAP Handset up to 1000metres

• ZPT-T up to 2000m

• SABRE Handset up to 2000metres

• SMT or SIL package

• self test mode Incorporated

• CE compliant for EU licence free use

Description

FOBOEM provides an easy “plug and Play” Remote Control.

The ZPT Receiver module is an easy design into any circuit, and requires very few ad-

ditional components. When incorporated the ZPT Receiver module automatically out-

puts the serial data of any FOBBER Keyfob. Using the Easy LEARN Process

the ZPT can be paired with many FOBER keyfobs, which, when operated will cause

the ZPT Digital outputs to be activated.

Part Numbers

Header Pins

ZPT Module

FOBBER-8T4

FOBOEM Telemetry system

DS-FOBOEM-2

Compatible Transmitters

The ZPT module can be used with the transmitters below, The transmitter handset

will affect the maximum achievable range of operation.

TRAP Handset

A medium sized rugged handset available

as 1,2,3,4,6,8,16 buttons

Operating up to 1000m

TAURUS Handset

A rugged IP68 industrial handset

1, 2, 3, 4, 8 buttons

FOBBER Keyfob

Compact rugged handset Waterproof to

IP68 1,2,3,4,6,8 button Options

Operating up to 200m

FOBOEM Telemetry system

DS-FOBOEM-2

Pin-out

Pin No Name Direction Description

1 ANT In Antenna input/output 50ohm impedance

2 GND In Connect to ground

3 SLEEP In to GND, Module active

Connect to Vcc, Module Enters SLEEP

4 Vcc In Supply voltage

5 LED/

LRN Out/In

Learn switch input and LED output

Learn switch input: normally ‘high’ momentarily

connect to GND to enter Learn Mode.

6 SERIAL

O/P Out Serial Data output to Host micro

7 N/C - No Connect

8 MOM/

LATCH In

Set outputs as momentary or latching in opera-

tion.

Internally tied high.

Connect to GND for momentary

Disconnect for latching.

Once status has been changed, the power must

be cycled in order for the change to take ef-

fect.

9 O/P4 Out Digital Output

10 O/P3 Out Digital Output

11 O/P2 Out Digital Output

12 O/P1 Out Digital Output

Pin Description

ANT

GND

SLEEP

Vcc

O/P3

O/P1

O/P2

LED/LRN

O/P4

SERIAL O/P N/C

MOM / LAT

FOBOEM Telemetry system

DS-FOBOEM-2

Operation

The ZPT module will remain in a low power listening mode at all times when power is present and

the Sleep Input is Low. When a valid RF signal is received ZPT will wake and process the RF

packet.

if the received RF Packet is from a Transmitter that has been “Paired” to the ZPT module, the

Digital Telemetry outputs are asserted accordingly.

The RF Packet Data is always presented at the Serial data output to the host.

Pairing Process

This process creates a paired link between an input button on a transmitter with one of the ZPT

Digital Telemetry outputs. Any input from any transmitter can be paired to any output of the

ZPT module.

1. Briefly GND Pin 5, the LED will flash once - this shows OP1 is selected

2. GND Pin 5 again after release the LED will flash twice to show OP2 is selected

3. Repeat above process to select OP3 or 4

4. With the desired output selected (and before a 10sec timeout)

5. Press the button or activate the input on the transmitter to be paired.

6. This will complete the pairing and the LED will flash twice to confirm

Memory: maximum storage is 30 pairings.

Erase

To erase the ZPT memory and remove all stored transmitter pairings you must connect the

Learn

Pin (5) to Ground for 10 seconds.

The Learn LED will illuminate while the pin is grounded and after it is disconnected will flash 3

times to Confirm memory erase has been completed.

Outputs

Outputs are LVTTL / LVCMOS at Vcc and are Active high.

Momentary or Latching Function

ZPT actions transmitter button state change only, therefore momentary mode requires receipt

of a “button down/input active” packet and a “button up/input not active” packet from a trans-

mitter. In momentary mode on receiving a “button down” the ZPT will hold its output active until

a “button up” is received. In latching mode ZPT must see “button down” then “button up” in or-

der to make a state change to assert or relax an output.

Mode LED Description

Normal operation OFF No RF data is being transmitted/received

Flickering Module is receiving data

Learn and erase

Flashes

While input is connected to GND

(i.e. during button press).

Flashes to show output selection and

paring success

Learn mode times out after 10 seconds

Flashing twice ZPT pairing successful

Flashes three

times ERASE successful

FOBOEM Telemetry system

DS-FOBOEM-2

ZPT Receiver module serial data output

The ZPT outputs the serial number, button and battery status of the transmitter encoder. This

data may be fed directly to a microcontroller or RS232 type driver circuit which may then be fed

directly to a PC serial port.

Serial data is output on every packet receipt - this equates to every 1/4 second whilst a button

is held down/input active. This data output is valid regardless of whether the Transmitter/Encoder

has been learnt or not. The serial data packet contains a learn bit to show if an encoder input is

learnt.

Serial data configuration

Baud Rate: 19,200

Data bits: 8

Parity: none

Stop bits: 1

Handshaking: none

Serial data format:

Serial number [SN1 SN2 SN3]:

Made up of three 8-bit bytes where the most significant byte is transmitted first.

Example: 12ABAA (hexadecimal) or 0001 0010 1010 1011 1010 1010 (binary)

Tx inputs [IP1-8 IP9-16]: made up of two 8-bit bytes.

The low order byte is sent first representing inputs 8 down to 1 where the MSB is input 8 and

the LSB is input 1. The high order byte is sent next representing inputs 16 down to 9 where the

MSB is input 16 and the LSB is input 9.

A bit at state 1 represents an encoder input as active.

Using this method inputs can be multiplexed giving maximum versatility.

Example: 00000000 00010000 Shows input 13 active.

10000000 00000000 Shows input 8 active

10000001 10000000 Shows inputs 16, 8 and 1 active

Learn status and low battery:

One 8 bit byte:

Bit0 shows low battery on Tx - where 1 = Low battery

Bit1 shows learn status of Tx - where 1 = Learnt

RSSI

Received Signal Strength Indication.

Bespoke versions

Customised versions of the all transmitters, receivers and chipsets are available to provide a

bespoke remote chipset for OEM

SN1 SN2 SN3 IP1-8 IP9-16 TXV

Line Feed - $0A (hex)

Input status on Tx

3 byte serial number

STAT RSSI CR 10 bytes of serial data sent

Carriage Return - $0D (hex)

Tx battery voltage (if available)

Learn status and low battery

RSSI 0 - 255 (hex)

FOBOEM Telemetry system

DS-FOBOEM-2

ZPT example application circuit

GND

ANT

Output 1

Output 2

Output 3

Output 4

560R

Learn

LED Learn

switch

Serial

Output

Vcc

Description:

This example shows a ZPT module receiver with all 4 outputs connected.

Note: The external learn switch and learn LED are both shown connected in this example.

MAX232

1uF

100nF

Serial

Data

Output

GND

ANT

560R

Learn

LED

Vcc

ZPT connected with Serial data output via MAX232

FOBOEM Telemetry system

DS-FOBOEM-2

Range Considerations

The antenna choice and position directly affects the system range, keep it clear of any large

metal parts. The best position is protruding vertically from the top of the product. This is of-

ten not desirable for practical reasons and thus a compromise may be needed. Note that the

space around the antenna is as important as the antenna itself. All radio systems are depend-

ent on a radio signal being received through airspace.

The range quoted is the optimal in direct line of sight without obstacles and in good

atmospheric conditions.

Range is affected by many things, for example local environmental conditions, atmospheric

conditions, interference from other radio transmitters. For evaluating the local environment

please see our RF Meter (DS006).

In very worse case applications the range quoted may be reduced dramatically below the opti-

mal range stated.

Self Test Mode

ZPT module incorporates a self test which is initiated by applying power with the learn button

held down.

The module then performs the following functions:

1. All outputs operate in turn ON/OFF twice

2. All outputs flash ON/OFF 5 times - 1&3 and then 2&4

3. Transmits a full power RF signal for 5 seconds while flashing the learn LED

4. Enters RSSI (Received Signal Strength Indication) mode where outputs 1-4 are activated

as a bar graph type output according to the strength of a valid RF signal received (from

any carrier operating at the appropriate frequency (869.50MHz). 4 Outputs on being

maximum strength.

5. To exit RSSI mode cycle power to the module.

6. A power cycle reset is required to exit

FOBOEM Telemetry system

DS-FOBOEM-2

Mechanical dimensions

16.50

19.25

2.54

D 1.00

1.00

2.00

17.50

1.20

3.00 PCB pad Layout

2.54

13.00

11.75

6.00

2.50

1.00

0.65

16.50

19.25

2.54

D 1.00 13.00

D Package

Surface Mount Package

FOBOEM Telemetry system

DS-FOBOEM-2

ZPK module re-flow guide

Profile feature Value (lead free)

Ramp up rate 3oC /s

Pre-heat temperature

- Temperature Min (TSmin)

- Temperature Max (Tsmax)

- Pre-heat time

1500C

2000C

60-100s

Peak temperature (TP) 2400C

Time at TP10-20sec

Ramp down rate 60C/s

Time from 250C to peak 8 mins max.

Zetaplus telemetry module version identifica-

Single Pink dot indicates

ZPT Receiver module

ZPT Firmware Version

Brown ver 1

Red ver 2

Orange ver 3

Yell ver4

Green Ver 5

Blue ver 6

Violet ver 7

Grey ver 8

White ver 9

Test

Green

Pass

Frequency of Operation

Red 433MHZ

Blue 868MHz

Brown 915MHz

FOBOEM Telemetry system

DS-FOBOEM-2

Electrical Characteristics

Parameter Symbol Test Min Typ. Max Unit

Supply voltage range Vcc 1.8 3.3 3.6

Power saving modes ISleep Module asleep with shutdown pin active.

Note all outputs are disabled

—<1 uA

RX mode current Module is in RF Data receive mode —16 —mA

AC Characteristics

Parameter Symbol Test Condition Min Typ. Max Unit

RX channel bandwidth 60 kHz

Image rejection ImREJ

Rejection at the image

IF = 468 –35 dB

Spurious emissions POB_RX1 Measured at RX pins –54 dBm

DC characteristics

Parameter Symbol Notes

Ambient Tempera-

ture

Supply Voltage

I/O Drive Voltage VGPIO

Operating Fre-

quency

868MHz version

915MHz version

915.

896.500

915.

MHz

RX Sensitivity

-121 dBm

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