IMO AC02C Auxiliary Contact Block – 1 x Normally Open (N/O) for CR Series Contactors
£11.54
Ex. VAT
(over £100+VAT, applies to zone A only , £6 +VAT otherwise)
Order online & collect in store
This is the IMO AC02C Auxiliary Contact Block – a 1 x Normally Open (N/O) for CR Series Contactors available at SparksDirect for the best price. Purchase this item with confidence at Sparks today.
The IMO AC02C is a clip-on auxiliary contact block designed to enhance the control capabilities of the IMO CR-series contactor range. Unlike the AC01C (which is normally closed), the AC02C provides one Normally Open (N/O) contact.
This means the circuit is open by default and only closes when the main contactor is energized. It is the industry-standard choice for creating "latching" circuits, where a momentary push-button start needs to keep the contactor engaged.
This unit is not designed to power heavy machinery directly; instead, it provides the "logic" for your control system. While your main contactor handles the high-amperage loads for industrial motors, large-scale heating banks, or commercial lighting arrays, the AC02C handles the signaling. It is designed to fit onto the front of DIN-rail mounted or enclosure-based contactors (specifically models CR01C through CR12C).
When used in motor control, it works alongside IMO Overload Relays (such as the OL09D series) to ensure the system can provide feedback signals to a control panel or PLC.
Technical Specifications
- Model Number: AC02C (Manufacturer Part No: MCA10)
- Contact Configuration: 1 x Normally Open (N/O)
- Compatible Range: IMO CR01C to CR12C (and MC10 to MC74) series
- Thermal Current (Ith): 10A
- Rated Operational Voltage (Ue): 690V AC
- Switching Type: Twin bifurcated contacts (optimised for low-level switching reliability)
- Mounting Type: Front/Top mounting (Snap-on)
- Terminal Type: M3.5 Screw terminals
- Standards: UL Recognised, CE, RoHS Compliant
- Dimensions: 10.5mm (W) x 43mm (H) x 17mm (D)
Frequently Asked Questions
Q: Can I use this to signal a "Run" light on my control panel?
A: Yes, this is one of the most common uses for the AC02C. Because the contact is Normally Open, it will only close (turning the light on) when the main contactor is active, providing visual confirmation that the machine is running.
Q: Does "1 N/O" mean I can switch a single-phase motor with this?
A: No. An auxiliary contact is for control current, not load current. While it is rated at 10A (AC1), it is not designed for the high inrush currents of motors. You must use the power poles of the main contactor to switch the motor.
Q: How many of these can I fit onto one contactor?
A: Most IMO CR-series contactors allow you to snap on one auxiliary block on the front. However, because these are thin (10.5mm), specific configurations allow for multiple contacts depending on the base contactor model used.
Who can install this?
The installation of the AC02C must be performed by a qualified electrician or a competent industrial technician. Because this component is often used in self-latching circuits and safety interlocks, a wiring error could cause a machine to restart unexpectedly or fail to stop when commanded. Knowledge of control circuit diagrams and safe isolation procedures is mandatory.
What is this for?
- The IMO AC02C is used primarily for Control Logic and Feedback. Common applications include:
- Latching (Self-Holding) Circuits: Used in conjunction with a "Start" push-button to keep the contactor closed after the button is released.
- PLC Input Signaling: Providing a digital signal to a programmable logic controller to confirm that a specific load (like a pump or heater) has been successfully engaged.
- Sequence Control: Ensuring that "Machine B" cannot start until the AC02C on "Machine A" has closed, confirming the first machine is already operational.
- Remote Monitoring: Triggering an hour-counter or a remote telemetry unit to track how long a piece of equipment has been running.
Note: Some images and pictures are for reference only. The item may differ from the image/picture due to manufacturer's change. Should you require the exact item in the picture, please call or email us to enquire.
Shipping
Sparks Direct delivers via courier to the UK only; the standard delivery charge is £6 + VAT for all orders under £100 + VAT. If your order is over £120, you get free delivery (unless there's a special delivery charge for the items you wish to order or you're in shipping zone C or D). Full details for shipping charges can be found via Terms and Conditions.
If the items you order are in stock and the order is placed before 1.00pm, delivery can be made within 1-2 working days. If the items are not in stock, we will inform you via email how long it will take or ask for your confirmation if there's a long lead time.
Returns
We offer 30-day returns for unwanted items - please email us to request a returns number which will need to be quoted when the items are returned. For faulty items or items damaged in transit, please advise via email, and an appropriate returns number will be provided. Full details concerning returns and refunds can be found via our Terms and Conditions.
