SERIES Z/T23 Safety-Rated, Positive-Break Miniature DIN Limit Switches Features & Benefits Positive-Break NC contacts won t stick or weld shut. Watertight design meets IP washdown requirements. Rugged, corrosion-resistant housing tolerates hostile environments. Six popular actuator styles for application versatility. Four 9 actuator mounting positions provide installation flexibility. Slow or snap-action operation choose to best satisfy application requirements. Safety-system approved (Z23 Series) for use in machine guarding applications. Meets rigid safety agency standards IEC, BG, VDE, UL and CSA. Description The Z/T23 Series limit switches are designed for use with movable machine guards/access gates which must be closed for operator safety and for any other presence/position sensing application normally addressed with conventional limit switches. Their positive-opening NC contacts provide a higher level of safety and/or reliability than conventional spring-driven switches whose contacts can weld or stick shut. Each is available with a choice of six standard actuators rounded plunger, roller plunger, roller rocking lever, rod rocking lever, adjustable roller rocking lever and one-way roller lever mountable in any one of four 9 positions. All rocking levers are positively-locked to the shaft, and are adjustable throughout 3 in increments. Units are available with a choice of slow-action or snap-action contacts. Their rugged fiberglass-reinforced housing and IP rating make them ideal alternatives to conventional limit switches. Typical Applications The Z/T23 Series may be used in any presence/position sensing application normally addressed with conventional limit switches. Snap-action models with positive-break NC contacts (Z23 Series) are approved for use in safety systems. For safety applications the switch must be mounted such that the actuating element of the machine displaces the switch actuator far enough to exceed the positive-break point. (See contact function diagrams: symbol *). ORDERING GUIDE FOR FEATURE: SPECIFY:. Contact operation: Slow Action T Z 2. Operating head V 3. Roller lever H 4. Body size 23-5. No. of NO contacts. No. of NC contacts. Degree of protection IP z 8. Sealing of operating head (optional) z* Example : TV H 23- Example 2: ZV H 23- *Available on rocking lever actuator style only. is a trademark of SCHMERSAL
MECHANICAL SPECIFICATIONS Housing Glass fiber reinforced selfextinguishing thermoplastic Operating Temperature F to +5 F ( 3 C to +8 C) Mechanical Life 2 million operations Minimum Cam Speed Z23 Series:.4m./minute (Referenced to Plunger) T23 Series: 2.4m./minute Maximum Operating Rate 5 operations/hour Bounce Time Z23 Series: 3 ms T23 Series: Function of cam speed Changeover Time Z23 Series: 5 ms for minimum cam speed T23 Series: Function of cam speed Degree of Protection IP Conformity to Standards IEC 94-5- EN 94-5- DIN VDE Part 2 BG-GS-ET5 DIN EN 5 4 CSA-C.2 UL58 ELECTRICAL SPECIFICATIONS Contacts Contact Configuration Contact Gap Contact Rating Switching Action Short Circuit Protection Rated Insulation Voltage Rated Impulse Withstand Voltage Type Terminals Fine silver Double-pole, double-break with electrically-separated contact bridges Z23 Series: 2x.8 inches (2x2mm) T23 Series: 2x. inches (2x3.5mm) 4A/23VAC 2.5A/4VAC Snap-action, positive-break NC contacts (Z23) Slow-action, positive-break NC contacts (T23) Fuse: A (time delay) 2.5A (no time delay A (time delay) as positive-break position switch 5VAC kv Screw terminals, maximum 2.5mm (AWG) wire CONTACT SYSTEMS Series T23 Slow-action switch Series Z23 Snap-action switch
Contact function diagrams Snap action positive break NO + NC ZS 23- ZR 23- NO + NC (break before make) TS 23- TR 23-2 NO (simultaneous) TS 23-2z TR 23-2z 2 NC (simultaneous) TS 23-2z TR 23-2z Dimensions mm inch Types of Actuators Actuating force/-torque Actuating speed Z/T at Rounded plunger Style S 9 N (9 N positive break) : min. / mm/min, max. m/s Roller plunger Style R 9 N (9 N positive break) 3 : min. 2/2 mm/min, max. m/s positive break ZS 23- ZR 23- Part No. 23 24 TS 23- TS 23-2z* TR 23- TR 23-2z* 2 TS 23-2z TR 23-2z 2
3, 9,3 Z4S 23- Z4R 23-, ZK 23-,4 5,2 9,3 T4S 23- T4R 23-3, 5,5 TK 23-5,2 9,3 T4S 23-2z T4R 23-2z TK 23-2z 5,2 3, 5,5 9,3 T4S 23-2z T4R 23-2z 3, 5,5 TK 23-2z Rounded plunger (central mounting) Style 4S Top roller plunger (central mounting) Style 4R Top roller lever Style K 9N (9N positive break) 9 N (9N positive break) 8 N (8 N positive break) : min. / mm/min, max. m/s 3 : min. 2/2 mm/min, max. m/s 3 : min. 24/24 mm/min, max. m/s Z4S 23- Z4R 23- ZK 23- T4S 23- T4R 23- TK 23- T4S 23-2z* T4R 23-2z* TK 23-2z* T4S 23-2z T4R 23-2z TK 23-2z 3
Contact function diagrams Snap action positive break NO + NC 3 3 5 5 ZVH 23-2, 5,4 ZR 23-2 2 NO + NC (break before make) 3 3 TVH 23-2,3 TR 23-4 4 2 NO (simultaneous) 4 4 TVH 23-2z 2,3 TR 23-2z 4 4 2,3 2 NC (simultaneous) 3 3 TVH 23-2z 2,3 TR 23-2z 3 3 2,3 Dimensions mm inch Types of Actuators Actuating force/-torque Actuating speed Z/T at Roller rocking lever Style H 5 Ncm (8.5 Ncm positive break) 3 : min. 92/492 mm/min, max. m/s Top roller lever Style R 5 Ncm (8.5 Ncm positive break) 3 : min. 2/ mm/min, max. m/s positive break ZVH 23- ZR 23- Part No. 23 24 TVH 23- TVH 23-2z* TR 23- TR 23-2z* 2 TVH 23-2z TR 23-2z 4
3 3 3 3 2,8 5 5 5 5 ZVH 23- ZVH 23-5,5 Z3K 23-2 2 2 2,2 3 3 4 4 TVH 23-3 3 4 4 TVH 23-4 2,8 4,3 T3K 23-4 4 4 4 TVH 23-2z 4 4 4 4 TVH 23-2z 4 4 T3K 23-2z 3 3 TVH 23-2z 3 3 TVH 23-2z 2,8 4,3 T3K 23-2z 3 3 3 3 2,8 4,3 Adjustable roller rocking lever* Style H Rod rocking lever* Style H One-way roller lever Style 3K 5 Ncm (8.5 Ncm positive break) 5 Ncm (8.5 Ncm positive break) 9 N (9 N positive break) 3 : min. 24/4 mm/min, max. m/s 3 : min. 8/4 mm/min, max. m/s 3 : min. 2/ mm/min, max. m/s ZVH 23-* ZVH 23-* Z3K 23- TVH 23-* TVH 23-* T3K 23- TVH 23-2z* TVH 23-2z* T3K 23-2z* TVH 23-2z* TVH 23-2z* T3K 23-2z 5
Contact function diagrams Snap action positive break NO + NC 2 5 2 9, Z4K 23-,8 4,9 2,8, ZK4 23- NO + NC (break before make) 2 5, T4K 23-,2 2,8 4,9, TK4 23-2 NO (simultaneous) 2 T4K 23-2z,2 2,8,2 TK4 23-2z 2 NC (simultaneous) 5, 2 5, T4K 23-2z 4,9, 2,8 4,9, TK4 23-2z Dimensions mm inch Types of Actuators One-way roller lever Style 4K One-way roller lever Style K4 Actuating force/-torque Actuating speed Z/T at N ( N positive break) 3 : min. 44/24 mm/min, max. m/s N ( N positive break) 3 : min. 5/33 mm/min, max. m/s positive break Z4K 23- ZK4 23- Part No. 23 24 T4K 23- T4K 23-2z* TK4 23- TK4 23-2z* 2 T4K 23-2z TK4 23-2z