Finder 7S.23.9.024.0210 Safety Relay 24 V DC

Name: Finder 7S.23.9.024.0210 Safety Relay 24 V DC – Datasheet
Brand: Finder
SKU: 7S.23.9.024.0210

A forcibly guided relay module for SIL 2 safety circuits

The Finder 7S.23.9.024.0210 is a relay module with forcibly guided contacts for safety applications, in a housing 17.5 mm wide for 35 mm rail. It has two normally open contacts and one normally closed contact, a 24 V DC coil and an LED showing coil status. Finder classes the 7S.23 as a Type A forcibly guided contact relay under EN 61810-3 and evaluates it to SIL 2 under EN 61508, for use in functional safety applications up to SIL 2 under EN 62061 and up to performance level d under EN 13849-1.

The contacts are silver-nickel with gold plating, which suits both the 10 A rating and the low minimum switching load of 60 mW (5 V / 5 mA). Gold flashing helps when the same relay sometimes switches small signal loads in a safety loop. The contacts are cadmium free.

Technical specifications

Parameter	Specification
Manufacturer / series	Finder, 7S series (modular relays with forcibly guided contacts)
Ordering code	7S.23.9.024.0210
Contact configuration	3 pole: 2 NO + 1 NC
Contact material	AgNi + Au
Rated current / maximum peak current	10 A / 20 A
Rated switching voltage	250 V AC (50/60 Hz)
Rated load AC1	2500 VA
Rated current AC15 (230 V AC)	5 A
Breaking capacity DC1 at 24 / 110 / 220 V	10 / 0.6 / 0.3 A
Breaking capacity DC13 at 24 V	5 A
Minimum switching load	60 mW (5 V / 5 mA)
Coil voltage of this version	24 V DC (series range 12, 24, 48, 110 V DC)
Rated coil power	1 W
Operating range	0.8 to 1.2 UN
Holding voltage / must drop-out voltage	0.45 UN / 0.1 UN
Mechanical life	10 million cycles
Electrical life at rated load AC1	100 000 cycles
Operate / release time	7 ms / 17.5 ms
Bounce time NO / NC	2 ms / 15 ms
Insulation, coil to contacts (1.2/50 us)	6 kV
Dielectric strength between open contacts	1500 V AC
Rated insulation voltage	250 V AC (supply system 230/400 V AC)
Vibration resistance (10 to 200 Hz) NO / NC	10 g / 2 g
Shock resistance NO / NC	20 g / 6 g
Ambient temperature	-40 to +70 C
Protection category	IP 20
Terminals	Box clamp, wire strip length 9 mm, 0.8 Nm; solid 1 x 6 or 2 x 2.5 mm2
Safety classification	EN 61810-3 Type A; SIL 2 (EN 61508); PL d (EN 13849-1)

How forcibly guided contacts are used

In a forcibly guided relay the normally open and normally closed contacts are mechanically linked, so a welded NO contact keeps the NC contact from closing. The NC contact is therefore wired into the feedback or start-up check of the safety circuit, and the two NO contacts switch the load or a downstream contactor. Whether a given circuit reaches SIL 2 or PL d depends on the complete architecture, diagnostics and the B10d values for the application, so the module is one part of a safety function rather than a safety function on its own.

Selection and installation notes

The coil of this version is 24 V DC; the datasheet also lists 12, 48 and 110 V DC versions of the 7S.23, so confirm the control voltage before ordering. Check the 10 A contact rating against the real load and the AC15 figure of 5 A at 230 V AC for coils. Allow the 17.5 mm module width on the rail and keep conductor sizes within the box-clamp limits above.

Documents and quotation

The attached Finder datasheet covers the 7S series with ordering information, contact diagrams, derating data and outline drawings. For a quotation on 7S.23.9.024.0210, send the quantity, the coil voltage, the load current and voltage, and the safety standard the machine must meet. Related items are listed under Automation Accessories.

Relay, contactor and power supply families

The range runs from step relays and modular contactors to safety relays with forcibly guided contacts and switch mode power supplies for 35 mm rail. Each series has a datasheet with ordering codes, coil data, contact ratings, derating curves and approvals, so a part can be specified or replaced by its full type code rather than by series name alone.

Ordering Finder products: what we need

Quote the complete ordering code, including coil voltage and contact variant, together with the quantity, the supply voltage and frequency of the installation and any approvals the project requires. With that information the matching Finder version can be confirmed against the datasheet before a quotation is issued.

Frequently Asked Questions