EUCHNER CTP-L1-BP-U-HA-AZ-SA Guard Lock

Name: EUCHNER CTP-L1-BP-U-HA-AZ-SA Guard Lock | Seven Star LLC
Brand: EUCHNER
SKU: CTP-L1-BP-U-HA-AZ-SA

Transponder-coded guard locking for hazardous run-down

The EUCHNER CTP-L1-BP-U-HA-AZ-SA (order no. 166752) is a transponder-coded safety switch with guard locking from the CTP family. It holds a safety door closed until the machine has reached a safe state, for example until a spindle, rotor or press has stopped. The evaluation electronics are integrated, so the switch delivers two monitored semiconductor safety outputs directly to a safety controller or safety relay.

The code letters describe the version: L1 means guard locking by spring force with release by applying power (closed-circuit current principle), and U stands for unicode evaluation, where the switch only accepts the last actuator that was taught in. The actuating head is approached horizontally; in the delivery state, approach directions A, B and C are possible, and the head can be turned in 90° steps.

Technical specifications

Parameter	Specification
Order number	166752
Guard locking principle	Closed-circuit current (spring-locked, power-ON released)
Locking force	Fmax 3900 N; FZh 3000 N
Coding	Unicode (RFID transponder)
Electronics operating voltage	24 V DC, -15% to +20%, regulated
Solenoid operating voltage	24 V DC, -15% to +20%; 100% duty cycle
Current consumption	Solenoid 400 mA; electronics 40 mA
Safety outputs	FO1A/FO1B, 2 p-switching semiconductor outputs, 1 to 150 mA; DC-13 24 V 150 mA
Monitoring outputs	OD (door position), OI/C (diagnosis/communication), 1 to 50 mA
Risk time	max. 270 ms; +5 ms per additional device
Connection	1 x M12 plug connector, 8-pin
Actuating / extraction / retention force	10 N / 20 N / 20 N
Approach speed / overtravel	max. 20 m/min / 5 mm
Mechanical life	1 x 10⁶ operations
Degree of protection	IP65 / IP67 / IP69 / IP69K (connector screwed tight)
Ambient temperature	-20 to +55 °C
Housing / head	Reinforced thermoplastic / die-cast zinc
Guard lock monitoring	PL e, category 4, PFHD 5.38 x 10⁻⁹, 20 years

Connection, diagnostics and series wiring

All signals run through one 8-pin M12 connector: separate 24 V supplies for the electronics and the locking solenoid, the two safety outputs, the door position output and a diagnostic output that can also communicate. In combination with an EUCHNER IO-Link gateway GWY-CB or ESM-CB, the switch can pass status and diagnostic data to the controller. The device has an auxiliary release on the front for opening the door during commissioning or a power failure, secured with a locking screw.

Because the switch uses the closed-circuit current principle, the door stays locked when power is lost. This is the usual choice when an open door during run-down would put a person at risk; check whether an escape release or rescue procedure is needed for walk-in guards.

Selecting actuators and accessories

The actuator is ordered separately. EUCHNER lists straight, bent and hinged CTP/CTA actuators, for example A-C-H-G-SST-126015 (straight) and A-C-H-W-SST-122667 (bent at top). Hinged actuators are offered for left, right, top and bottom hinged doors. Connecting cables with straight or angled M12 8-pin sockets in PUR or PVC are available in lengths of 10, 20 and 30 m. The safety outputs need a free-wheeling diode when switching inductive loads.

Documents and quotation

The attached EUCHNER operating instructions cover CTP-L1/2-BP devices, including wiring, teach-in and the auxiliary release. For a quotation, send the order number 166752, the actuator type, the cable type and length, and the quantity. See Safety Switches & Guard Locking for related EUCHNER devices.

EUCHNER manufactures industrial safety components and systems for machine access and guard monitoring. Its product range includes electromechanical safety switches, transponder-coded devices, guard-locking systems and electronic key systems. These components support applications in automated manufacturing, assembly, material handling and other machine environments. EUCHNER selections depend on the actuator, locking principle, contact arrangement, interface and installation requirements. A switch or actuator is one part of a safety function; the complete system must be designed and validated for its intended application. For enquiries through Seven Star LLC in Oman and the GCC, provide the full order number, installed device details and required mating components.

Frequently Asked Questions