Installation
Installation guide
From a new account to a machine locked and ready for its first pre-start. Your team sets up the account and GoTags. Your own licensed auto electrician fits the Interlock.
Part 1
Set up your account
Owner or manager
- Organisation settings
- Equipment groups
- Equipment
- GoTags
- Checklists
- People
- Devices
Most of this can happen in any order, with one rule the platform enforces: equipment groups come before equipment and before licences. GoTags and devices are Parts 2 and 3.
- Organisation settings. Branding, regional defaults and operational defaults.
- Equipment groups. Excavators, telehandlers, light vehicles. A group carries default checklists and decides who may operate what.
- Equipment. Add machines one at a time, or in bulk by CSV import.
- Checklists. A pre-start template is mandatory. Service, induction and toolbox templates are there when you need them.
- People. Invite console users by email and give your field operators their licences. Give whoever does Parts 2 and 3 a Technician licence for the machine's license group.
Part 2
Fit the GoTags
Anyone can fit one. A Technician links it.
- Choose a flat, external spot. Rigid, and easy to reach without climbing: near the cab door or a step, where an operator stands on a walk-around.
- Avoid harsh exposure. Keep it away from abrasion, chemical splash and extreme heat such as exhaust manifolds.
- Clean and dry the surface. Adhesive over dust, oil or grease won't hold under vibration.
- Leave a little clearance from bare steel, where that's easy. NFC reads best that way, though it generally still works flat on metal.
- Press firmly and hold. Avoid trapped air, and hold for the time on the backing. Peeling destroys a tag.
- Have a Technician link it in the app. The label means nothing to the platform until it is installed against the equipment record.
- Near the cab doorAt standing height, easy to find
- By the stepOn the walk-around path
- Near the exhaustExtreme heat
- On or behind an attachmentAbrasion from other equipment or loads
- Up highAnywhere that needs a climb
Part 3
Fit the Interlock
A licensed auto electrician with a Technician licence
What you need
- An uncommissioned Interlock (model PSG-SIM-2285), with its D- serial number on the label
- The equipment's wiring diagram
- Wire strippers, crimpers, heat shrink and a multimeter
- A phone with an internet connection: commissioning is online only
- A Technician licence for the machine's license group, signed in to the app
Warning
Disconnect the equipment's battery before working on the wiring, and follow your organisation's lockout/tagout procedures.
Two rules decide which wire you touch.The Interlock locks the moment it decides to lock, with no grace period. These rules are what make that safe.
Rule 1: never wire the relay into a run circuit
An install that breaks this rule turns every lock into an engine cut. No software setting makes it safe.
Yes
Starter circuit
Carries no current while the engine runs. Opening it can't stop the machine; it only prevents the next start.
Yes
Operator-presence circuit
Opening it looks exactly like the operator standing up, which the machine's own safety systems already handle.
Never
Any circuit live while the engine runs
Opening it would cut the engine. Check the circuit is dead while the engine runs before you go further.
Rule 2: use J5 and J6, never J4
The interrupted circuit goes through J5 (COM) and J6 (NC). The relay is energised when the Interlock is locked, so the can-start position is the de-energised one: COM to NC.
Danger
Wiring J5 and J4 inverts the safety behaviour. The machine wouldn't start until the firmware booted, and never from a dead or unpowered Interlock. The board can't tell the two apart, so nothing catches this. Check the terminal numbers before you crimp.
COM J5NC J6NO J4Key switchSolenoidNeverA Starter install, shown unlocked or unpowered: COM to NC is closed, so the machine can start. Locking opens this path.
Choose the wiring mode
Pick what suits the machine, then record it as the device's Mode during commissioning. The device can't detect how it was wired.
Starter engine-start inhibitor
Key switch
Interlock relayJ5 + J6
Starter solenoid
While locked: the machine won't start. A running engine is unaffected.
Safety operator-presence inhibitor
Seat switch
Interlock relayJ5 + J6
Rest of the presence circuit
While locked: the machine starts and stops normally but can't be fully operated. It reads the seat as vacated.
Choose the power mode, and wire it
Permanent power is the default. The choice changes two terminals: J8 and J2.
Permanent power
Stays powered with the key off. The sense input must be wired, or the operator timeout fires mid-shift.
TerminalConnect to
J8+Battery +, unswitched6–36 V DC, through a fuse
J7−Clean chassis groundAlso the sense return
J5COMThe circuit you cutStarter or presence: one end on each terminal
J6NC
J2IGNIgnition-switched lineThe sense input, on every install
J4NONever use for the interlockIt inverts fail-START
J1INDLeave emptyNot needed for this install
Ignition power
Powers down with the key and boots locked on every key-on, so each start needs a Confirm in the app or a new pre-start.
TerminalConnect to
J8+Ignition-switched line6–36 V DC, through a fuse
J7−Clean chassis groundAlso the sense return
J5COMThe circuit you cutStarter or presence: one end on each terminal
J6NC
J2IGNLeave emptyPower itself is the signal
J4NONever use for the interlockIt inverts fail-START
J1INDLeave emptyNot needed for this install
Note
Servicing an older Safety install? A Safety machine fitted before October 2026 may still have its sense wire (J2) on the seat switch, the operator-presence circuit. Move it to the ignition-switched line at this visit. The relay stays where it is, on the presence circuit through J5 and J6.
Fit it
- Identify the circuit to interrupt. Starter mode: the wire carrying the start signal from the key switch to the starter solenoid or engine controller. Safety mode: the operator-presence circuit, typically the seat switch. Confirm it is dead while the engine runs.
- Mount the Interlock. Somewhere protected in the cabin or engine bay, away from water, excessive heat and direct vibration, with the Bluetooth path toward the operator as clear as practical. Keep it out of casual sight.
- Wire the power supply. J8 to the source for your power mode, J7 to a clean chassis ground.
- Wire the sense line (permanent power only). J2 to the ignition-switched line, on Starter and Safety installs alike.
- Wire the relay through J5 and J6. Cut the circuit from step 1 and land one end on each. Do not use J4.
- Reconnect the battery and power the machine without starting the engine. A new unit flashes green.
- In the cabinUnder the dash or a panel, out of sight
- In the engine bayShielded from heat, water and vibration
Commission it, at the machine
- Open the equipment in the app, or scan its GoTag, and start commissioning. Enter the D- serial from the label. The machine must not already have an active interlock.
- Stay at the machine for the confirm press. Your phone relays a signed registration over Bluetooth. The LED flashes purple and waits up to 30 seconds for a press of the mode button. Miss it and nothing is saved; start again.
- Set the machine's settings. Record the wiring Mode and behaviour settings here, at the machine. The office console shows them read-only.
Once confirmed, the device is registered and its device subscription starts billing.
- Flashing greenPowered up and not yet registered. This is what you want to see first.
- Flashing purpleRegistration received. Press the mode button within 30 seconds.
- Solid redRegistered and locked, waiting for the machine's first pre-start.
- Solid greenUnlocked after a passing pre-start.
Check every line before you hand it back
- New unit flashed green; after commissioning the LED is solid red
- Relay is on J5 + J6. Pull the Interlock's fuse: the machine can still start
- Starter: the engine starts only after a passing pre-start (solid green)
- Safety: the machine starts either way, but can't be fully operated while locked
- Complete a pre-start and the relay closes. When the validity window expires it opens immediately, with no grace period
- The recorded Mode matches how the machine is actually wired
- The sense input tracks the key: watch the state change in the app while you cycle it
If something's off
| Symptom | Likely cause | What to do |
|---|---|---|
| LED dark after reconnecting the battery | No power reaching the unit | Check supply, ground and fuse; confirm 6–36 V DC |
| Flashing green never becomes purple | Registration never reached the device | Stay in Bluetooth range, confirm the phone is online, restart commissioning |
| Flashing purple went back to green | The 30 second window timed out | Nothing was saved. Run it again and press the button promptly |
| Amber flashing after commissioning | The self-test found a fault | It still allows starting (Fail-START). Reconnect with the app; contact support if it persists |
| Machine cranks while locked (Starter) | Relay wired through J4, not J6 | Rewire through J5 + J6 |
| Operator timeout fires mid-shift | Sense input unwired on permanent power | Wire J2 to the ignition-switched line |
Want to see it on one of your machines?
Tell us what you run and where, and we'll come back to you with what it takes to fit your fleet.