Approvals: Safety relay RT9 Safety relay for: Emergency stops Light curtains Three position devices Interlocked gates/hatches Magnetic switches Light beams Safety mats Contact strips Foot operated switches Features: Five input options Single or dual channel input Would you like a small safety relay for all your safety Manual supervised or automatic applications? reset Then choose the compact RT9 universal relay to supervise both Test input for supervision of your safety devices and the internal safety of your machinery. In addition, you can select the safety level that is required for external contactors each installation. All this is possible due to the RT9 offering the most versatile input option arrangement available on the Width 22.5 mm market. The RT9 can therefore replace many other relays. Other RT9 options include selection of either manual LED indication of supply, inputs supervised or automatic resetting. The manual supervised and outputs, short-circuit and reset can be used for gates and other safety devices that can be bypassed. Automatic reset can be used for small safety low voltage level hatches, if deemed acceptable from risk assessment. In addition, the RT9 has a double information output that will 2 NO relay outputs indicate e.g if a gate is open or if the relay needs resetting. The RT9 uses the latest component technology and One changeover relay with a modern assembly techniques to ensure a highly cost effective double information output solution. Choose the RT9 to simplify your safety circuits and reduce Supply 24 VDC your costs. Quick release connector blocks www.jokabsafety.com www.jokabsafety.com 4:14 Technical information - RT9 1 Inputs Indication of low voltage The RT9 can be configured to operate in either of the following The ‘On’ LED will flash if the relay supply voltage falls below an input options: acceptable level. This indication will also be given if a monitored 1. Single channel, 1 NO contact from +24VDC, safety cat. 1. safety mat/contact strip is actuated. Please see Connection 2. Dual channel, 2 NO contacts from +24VDC, safety cat. 3. option 5. 2 3. Dual channel, 1 NO, 1 NC contact from +24VDC, safety cat. 4. 4. Dual channel, 1 NO contact from 0V and 1 NO contact from Safety level +24VDC, safety cat. 4. The RT9 has internal dual and supervised safety functions. Power Emergency stops 5. Safety mat/contact strips, 1 ‘contact’ from 0V and 1 ‘contact’ failure, an internal faulty component or external interference Light curtains +24VDC, safety cat. 1. will not present a risk to options with the highest safety level. A manual reset requires that the reset input is closed and opened 3 Three position devices When the input/inputs are activated and the test/supervised reset before the safety relay outputs are activated. A short-circuit or is complete, relays 1 and 2 are energised. These are de-energised a faulty reset button is consequently supervised. Interlocked gates/hatches when the input/inputs are de-activated in accordance with the input When the RT9 is configured for dual channel input, both Magnetic switches option chosen or in case of a power failure. the inputs are supervised for correct operation before the unit Relays 1 and 2 must both be de-energized before the RT9 can can be reset. Light beams be reset. The input options 3 and 4 have the highest safety levels 4 as all short-circuits and power failures are supervised. This in Safety mats Relay output status information combination with an internal current limitation makes the relay Contact strips The RT9 has a changeover contact relay output that can be con- ideal for supervision of safety mats and contact strips. nected to a PLC, control lamp, computer or similar. The output gives Foot operated switches information about the status of the relay. Regulations and standards The RT9 is designed and approved in accordance with appropri- 5 Reset and testing ate directives and standards. Examples of such are 98/37/EC, The RT9 has two reset options; manual and automatic. The manual EN ISO 12100-1/-2, EN 60204-1, EN 954-1/EN ISO 13849-1. supervised reset can be used when the RT9 is monitoring safety devices that can be bypassed, i.e. to ensure that the outputs of Connection examples the safety relay do not close just because a gate is closed. The For examples of how our safety relays can solve various safety automatic reset option should only be used if appropriate from a problems, please see the section “Connection examples”. 6 risk point of view. Due to special internal circuits the RT9 can be automatically reset Features: regardless of the operational voltage rise time, this being an important factor when large loads are started up on the same power supplies at the same time. In addition, the RT9 can also test (supervise), if for example, 7 contactors and valves etc are de-energised/de-activated before a restart is made. 8 Connection of supply - RT9 DC supply 9 The RT9 should be supplied with +24 V on A1 Short circuit and 0 V on A2. protection NoTe If cable shielding is used this must be connected 10 Automatic to an earth rail or an equivalent earth point. fuse 11 12 13 www.jokabsafety.com www.jokabsafety.com 4:15 Connection of safety devices - RT9 3. DUAL CHANNeL, 1 No, 1 NC from 5. Safety mat/Contact strip 1. SINGLe CHANNeL, 1 No from +24V +24V The input (contact to S14) must be closed One input contact must be closed (S14) and Both ‘contact’ inputs from a inactivated before the outputs can be activated. When one opened (S44) before the relay outputs safety mat/contact strip must be made the input contact is opened, the relay safety can be activated. in order to allow the RT9 relay outputs output contacts open. The safety relay contacts will open if to be activated. When the safety mat/ one or both of the inputs change state or contact strip is activated or a short-circuit 2. DUAL CHANNeL, 2 No from +24V in case of a short-circuit between S14 and is detected across S14-S23, the relay will S44. Both inputs must be returned to their de-energize (safety contacts open) and initial status before the relay outputs can be the ‘ON’ LED will flash. As output S13 reactivated. has an internal current limit of 70 mA, the RT9 will not be overloaded when the mat/ 4. DUAL CHANNeL, 1 No from +24V, Both input contacts (S14 and S34) must contact strip is activated or a short-circuit 1 No from 0V be closed before the relay outputs can be is detected. activated. The safety relay contacts will open if one or both of the input contacts are opened. Both the input contacts must be opened and reclosed before the relay can be reset. Relay functions as option 2, but a short- A short-circuit between inputs S14 and circuit, in this case between inputs S14 and S24 is supervised (safety outputs are S34 can only be supervised if the device opened). connected to the inputs has short-circuit supervised outputs, e.g. JOKAB Focus light curtains Reset connections - RT9 Manual supervised reset Automatic reset Testing external contactor status The manual supervised reset contact Automatic reset is selected when A1(+), X1 Contactors, relays and valves can be connected to input X1 must be closed and X4 are linked. The relay outputs are then supervised by connecting ‘test’ contacts and opened in order to activate the relay activated at the same time as the inputs. between A1(+) and X1. Both manual outputs. supervised and automatic reset can be used. output connections - RT9 Relay outputs Information outputs The RT9 has a single changeover contact The RT9 has two (2 NO) safety outputs. information relay output.The relay output In order to protect the output contacts Y14 is connected internally to 0V and 24V it is recommended that loads (inductive) in the following way: are suppressed by fitting correctly chosen • Y14 is internally closed to 0V when VDR’s, diodes etc. Diodes are the best arc the RT9 is not reset. suppressors, but will increase the switch off • Y14 is internally closed to +24V when time of the load. the relay is reset. www.jokabsafety.com www.jokabsafety.com 4:16 LeD indication Technical data - RT9 1 On Supply voltage OK, the LED is on. Manufacturer JOKAB SAFETY AB, Sweden Flashing light in case of under- voltage, overload or current Article number/Ordering data 10-029-00 RT9 24DC limiting Black and beige Colour In1 In2 Indicates that the input conditions are fulfilled. Weight 210 g 2 1 2 Indicates that the output relays Supply 24 VDC +/- 20% have been activated. Voltage (A1-A2) Mounting Power consumption Rail 35 mm DIN rail Nominal voltage 2.5 W Operating temperature range -10°C to + 55°C Connection S13 Short-circuit protected voltage Connection blocks 3 output, 70 mA +/- 10% current (detachable) limitation. Is used for the inputs Maximum screw torque 1 Nm S14, S34 and S44. Maximum connection area: 2 2 Solid conductors 1 x 4mm / 2 x 1.5mm /12AWG Input currents 2 2 Conductor with socket contact 1 x 2.5mm / 2 x 1mm (at nominal supply voltage) S14 (+) input 30 mA Air and creep distance 4kV/2 IEC 60664-1 4 S24 (0V) input 20 mA Protection class S34 (+) input 20 mA Enclosure IP 40 IEC 60529 S44 (+) input 25 mA Connection blocks IP 20 IEC 60529 Reset input X1 Supply for reset input +24 VDC Reset current 300 mA current pulse at contact 5 closure, then 30 mA Minimum contact closure time for reset 80ms Minimum contact closure time (at low limit voltage -20%) 100ms Maximum external connection 6 cable resistance at a nominal voltage for S14, S24, S34 300 Ohm S44, X1 150 Ohm Response time At Power on <100 ms 7 When activating (input-output) <20 ms Connector blocks are detachable When deactivating (input–output) <20 ms (without cables having to be disconnected) At Power Loss <80 ms Relay outputs NO 2 8 Maximum switching capacity res. load AC 6A/250/1500 VA Maximum switching capacity res. load DC 6A/24 VDC/150W Max. total switching capacity: 8A distributed on all contacts Minimum load 10 mA/10V (if load on contact 9 has not exceeded 100 mA) Contact material Ag+Au flash 7 Mechanical life >10 operations Relay information output (Changeover contacts) Y14 - (0V) Indicates that RT9 is not reset. 10 +(24V) Indicates that RT9 is reset. Maximum load of Y14 250 mA Short-circuit protection for information output Internal automatic fuse 11 12 13 www.jokabsafety.com www.jokabsafety.com 4:17