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General
- Environmental -40 to 60º C, 0 - 99% RH
- EMC compliant EN 300 683
- Housing IP66 painted aluminum enclosure, 170 x 64 x 36 mm, 0.5 kg
- Weatherproof connector for external connections.
- SMA connector for antenna or coaxial cable connection.
- LED indicators - Radio TX, Operation OK
Power Supply
- 6 - 30 VDC
- Power consumption - quiescent (sleep mode) <140m A
- operating mode (@12VDC) <10mA + analogue loop*2,
- during radio transmission (35 msec) 300mA @ 12VDC
- Analogue loop supply internally generated, 24VDC 50mA
- Internal monitoring of supply low voltage status - can be transmitted to remote modules as a "discrete input".
- Internal monitoring of supply voltage - can be transmitted to remote module as an "analogue input".
Input Types
| Inputs |
External/Internal |
Type |
| Discrete |
External |
Status |
| Pulse total |
External |
Count |
| Pulse rate |
Internal |
Analogue |
| Analogue |
External |
Analogue |
| Setpoint |
Internal |
Status |
| Supply voltage |
Internal |
Analogue |
| Supply low voltage |
Internal |
Status |
Digital/Pulse Input
Digital Inputs
- two inputs, voltage free contacts / NPN, or TTL voltage input 0-1.5 VDC on / 3.5-13VDC off
Pulse inputs
- max rate volt free contacts 300 Hz TTL 10 KHz ; 50 KHz possible on PI2 using a configurable divider
Up/Down Pulse count
- suitable for quadrature or incremental shaft encoders
Pulse Rate
- calculated as an internal analogue input - range 0 - 1000Hz configurable scaling
Analogue Input
- selectable 0-24mA (4-20mA, 0-10mA) or 0-10V (0-5V, 0-10V)
- input range can be user calibrated
- "floating" differential input; common mode voltage 27V, resolution 12 bit; accuracy < 0.1 % of full range
Setpoint Status
- status sets (on) when analog value < low SP and resets (off) when analog value > high SP
- status transmitted as per discrete input
Serial Port
- RS232 DB9 female DCE, used for configuration and diagnostics.
Radio Transmitter
- 869.4 - 869.65MHz, fixed channel
- Transmitter power 500mW
- Conforms to EN 300 220
- Line of sight range 5km
- Range may be extended by up to five 905U repeaters.
- Each transmission may be configured to be sent 1 to 5 times.
Configuration and Diagnostics
- Windows configuration package
Mode of Operation
- Digital/pulse inputs measured on change and every 0.5 sec. Analogue input measured on user-configured sample period.
- Input messages transmitted to configured outputs when inputs change value, or after configured update time. User configurable paralysis time to inhibit transmissions.
- Units powers down between measurements to conserve power.
BU-5 Battery Pack
- 6 x AA alkaline batteries 9V, up to 1.4 year service life depending on input configuration
- Enclosure, specifications as per 505U-K enclosure.
- Temperature - dependant on battery type used.
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