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Remote Keypad - Controller
Board |
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Develec's Remote Data Capture Unit can be supplied as a Printed
Circuit Board for OEM system integration. You can install the PCB into your existing
systems or equipment. |
| Printed Circuit Board |
| The PCB is a glass fibre, double-sided, through-hole plated board.
Particular care was taken in routing the PCB to ensure that there are no 90 degree
corners and no vias. This boosts the PCB's
reliability. Use your mouse to identify PCB features. |
| The main controller PCB is 82mm by 102mm. Four 3mm mounting holes
are provided on 76mm x 94mm centres. The highest components (IDC ribbon connectors
with strain relief) are 25mm. |
| Connections |
| Three types of connectors are used: |
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- Molex 2-pin Header for an external buzzer
- ICD (Ribbon Cable) connectors for the Keypad, Expansion Port and the LCD Display.
- Phoenix Contact Connector Blocks with wire cages for all other connections.
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Network and Power |
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Two four-way connector blocks are provided for network connection.
The 'incoming' cable is connected to the one connector block and the 'outgoing'
cable is connected to the other connector block. |
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All connections on the two connectors are
electrically connected, on board, to the corresponding connections on
the other connector. RS485 is a bussed network standard and a continuous
connection is required from end-to-end. |
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A termination jumper is provided on the PCB as both ends of the
RS485 network should be terminated. The required termination resistance is 120 ohms and only
the devices at each end of the network should be terminated. Shorting the terminator
jumper connects an on-board 120 ohm resistor across the two network data lines. Thus
it is unnecessary to supply an external terminator. NB Ensure that ONLY
the two devices at the extreme ends of the network are terminated. |
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VIN |
Red |
+12V DC Power |
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NET + |
Yellow |
RS485 Data (+) - Twisted Pair |
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NET - |
Green |
RS485 Data (-) - Twisted Pair |
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GND |
Blue & Shield |
Ground |
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PC Keyboard |
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A four-way connector block is provided to allow connection to the
keyboard. Ideally, a PS2 connector (female) should be mounted on the enclosure to
allow the keyboard to be connected easily. |
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VCC |
Keyboard Power (+5V) |
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CLK |
Keyboard Clock Signal |
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DAT |
Keyboard Data Signal |
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GND |
Ground |
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Printer Port |
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The Printer Port (which can also be used as an auxiliary low speed
Serial or I/O Port) can be configured as a RS232 or TTL (5V) port. A four-way connector block is provided. |
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+VE |
Power Out (+12V or +5V Jumper Selectable) |
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TP |
Transmit Data Output (RS232 or TTL Jumper Selectable) |
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RP |
Receive Data Input (RS232 or TTL Jumper Selectable) |
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GND |
Ground |
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Barcode Scanner Port |
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The Barcode Scanner Port (which can also be used as an auxiliary
low speed Serial or I/O Port) can be configured as a RS232 or TTL (5V) port.
A four way connector block is provided. |
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VCC |
Power Out (+5V) |
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TS |
Transmit Data Output (RS232 or TTL Jumper Selectable) |
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RS |
Receive Data Input (RS232 or TTL Jumper Selectable) |
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GND |
Ground |
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LCD Port |
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Develec supplies the LCD Display (4 lines of 20 characters - backlit)
with a ribbon cable that plugs into this port. If you need to use a custom display,
please contact us. |
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Keypad Port |
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This port is designed to accept the ribbon cable connection to
the keypad. Should you have any custom keypad requirements, please contact us. |
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Expansion Port |
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This cable is designed to accept the ribbon cable from any custom
expansion devices. Should you need to add any custom designed devices, please contact
us. |
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Buzzer Connector |
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A 5V or a 12 V buzzer can be attached to this connector. |