Specifications
Technical specification
Buyer-level specification for the CANARY valve unit. Component-level design detail, schematics and firmware internals are proprietary and not published; qualified customers can review them under NDA during evaluation.
| Parameter | Specification |
|---|---|
| Topology | Inline between plant and valve — pass-through, non-intrusive |
| Plant input | 12-pin, standard valve interface pin assignment |
| Valve output | 12-pin, pass-through of supply, enable, command, actual value, enable acknowledgment and fault-free output |
| Connector type | Polarised, latching wire-to-board; mating housings and crimps supplied |
| Valve supply current | Up to 5 A continuous through the monitor |
| Control loop effect | None. The monitor does not drive, intercept or modify any control signal |
| Loss of monitor power | Valve continues to operate normally |
| Functional earth | Carried on the interface PE pin and the mounting points |
| Parameter | Specification |
|---|---|
| Valve supply voltage | Continuous, with sag and surge capture |
| Valve supply current | Precision shunt, bidirectional, ±5 A range |
| Command and actual value | Differential analogue acquisition, 16-bit, multi-channel |
| Spool response | Hysteresis, response threshold, null behaviour, step and ramp tracking |
| Vibration | Three-axis, wide band; ISO 20816 velocity plus high-frequency bands |
| High-frequency acceleration | Dedicated channel for the cavitation band |
| Acoustic emission | External AE sensor on a coaxial input, true-RMS level and hit rate |
| Oil temperature | PT100 RTD input, 3- or 4-wire |
| Auxiliary inputs | Two configurable analogue inputs. Pressure transmitters on ports A and B enable internal leakage and erosion detection |
| Derived measurements | 30 engineering measurements computed hourly on the device, fused by the proprietary CANARY prognostic model |
| Parameter | Specification |
|---|---|
| Fieldbus | Modbus register map for plant SCADA or PLC integration |
| Hard-wired output | Healthy contact, solid-state, for systems that want a dry contact |
| Serial | Isolated RS-485, selectable termination |
| Fleet network | Self-organising wireless mesh to a central unit, multi-hop with relay |
| Web interface | Served by every unit. Central unit shows the fleet; a valve unit shows itself |
| Local logging | Removable storage, hourly record of every measurement |
| Firmware updates | Over the air, including central-to-fleet rollout with automatic rollback on failure |
| Administration | Full settings, maintenance commands, account control and configuration backup |
| Parameter | Specification |
|---|---|
| Monitor supply | 24 VDC nominal, from the plant supply |
| Isolation | Functional isolation between field, logic, power-in and serial domains. This is ground-loop isolation for a 24 V SELV system, not safety isolation |
| Protection | Reverse-polarity, over-voltage transient and over-current protection on the supply input |
| Dimensions | 90 × 70 mm board; enclosure options on request |
| Mounting | Four M3 fixings; PE bonded to the mounting points |
| Design standards | Designed against IEC 61010-1, IEC 61326-1 and IEC 60068-2 for industrial measurement equipment |
Universal by design
One monitor, not one monitor per valve family
A plant rarely standardises on a single valve. CANARY is built so that the same unit fits across a mixed fleet: the plant and valve connectors are specified per order, and the control-signal interpretation is set in configuration rather than in hardware revisions.
Solenoid connectors
Form A, B and C per DIN EN 175301-803, formerly DIN 43650. Fitted to valves with no on-board electronics.
Monitored: supply voltage and current, vibration, acoustic emission and oil temperature — covering coil, cavitation, and wiring and supply.
7-pin and 6+PE
MIL-C-5015 style 7-pin, and 6+PE per DIN EN 175201-804 or DIN 43563. The common proportional and servo-proportional interface.
Monitored: everything above, plus command and spool position feedback — which enables hysteresis, response threshold, null behaviour and tracking.
11+PE and 12-pin
EN 175201-804 11+PE and DIN 43651 12-pin. The fullest interface, and the configuration the published specifications describe.
Monitored: everything above, plus digital status and fault outputs and further generic signal pins.
How ordering works. Send the valve data sheet with your order and the plant-side and valve-side connectors are built to match that valve’s interface, including the pin assignment. Pin assignments differ between manufacturers on the same physical connector, so the data sheet governs. The connector and valve reference sets out the common interfaces and what each one lets the monitor see.
Control signal support
Eighteen control-signal configurations, not one
CANARY is frequently assumed to be a ±10 V device. It is not. Four of the monitored pins are universal inputs, each independently configurable for voltage or current drive across the ranges below. That covers proportional valves driven on a voltage command and servo valves driven directly into a torque motor on a current command, along with the process-loop and low-level ranges in between.
| Range | Typical application |
|---|---|
| ±2 V | Low-level voltage command |
| ±2.5 V | Low-level voltage command |
| ±3 V | Low-level voltage command |
| ±5 V | Common proportional valve range |
| ±10 V | The most common industrial range |
| 0 to +10 V | Unipolar voltage command |
| Range | Typical application |
|---|---|
| ±5 mA | Low-level current command |
| ±6.2 mA | Servo valve torque-motor drive |
| ±7.5 mA | Servo valve torque-motor drive |
| ±8 mA | Servo valve torque-motor drive |
| ±10 mA | Servo valve torque-motor drive |
| ±12 mA | Servo valve torque-motor drive |
| ±12.5 mA | Servo valve torque-motor drive |
| ±20 mA | Servo and proportional drive |
| ±40 mA | High-current servo torque motor |
| ±50 mA | High-current servo torque motor |
| ±100 mA | High-current servo torque motor |
| 4 to 20 mA | Industry-standard process loop |
4
Universal inputs, each set independently. The command and the actual-value feedback can run on different signal types on the same valve.
Per pin
Signal type is selected per pin at commissioning and recorded in the unit’s configuration. Changing a valve does not mean changing the monitor.
24 V
Enable, enable acknowledgment and the fault-free output are read as isolated 24 V digital states, with timing between them measured.
The plant signal is never interrupted to measure it. On every universal input the sense element stays permanently in series with the signal, so no configuration setting and no monitor fault can open the path between plant and valve. Current-mode measurement does not break the loop; voltage-mode measurement does not load it. This is a deliberate design constraint, not a mode you select.
Auxiliary inputs
Two further configurable analogue inputs accept either 0 to 10 V or 4 to 20 mA transmitters, with sensor supply provided. These are where pressure transmitters on ports A and B connect to enable internal leakage and erosion detection, or where an oil-presence sensor connects to cover external weeping.
What this means for a mixed fleet
A site running Bosch Rexroth proportional valves on a ±10 V command alongside Moog servo valves on a ±40 mA torque-motor drive uses the same monitor on both. The difference is the connector specified at order and the signal code set at commissioning.
Commissioning
What a site needs to provide
Required
- A 24 VDC plant supply at the valve
- A commissioning period during which the unit learns the valve's own baseline
- A re-learn after any valve exchange, repair, oil flush or change of setpoint regime
Optional, and what each unlocks
- Pressure transmitters on ports A and B — enables internal leakage and edge erosion detection. Without them that mode reports as not monitored
- Coil thermal data from the valve data sheet — enables the estimated coil temperature check against the coil's class limit
- An oil-presence sensor on an auxiliary input — the only way to detect external weeping, which no on-board sensor sees
Certification status. The monitor is designed and tested against the standards listed above. Formal certification submissions are in progress and no certification mark is claimed at this time. Where an application is safety-related and requires a rated Safety Integrity Level or Performance Level, contact us before specifying — that assessment is not complete and we will not imply a rating we do not hold.