Edwards Signaling 300 Series - Manual

Description
The 301-BT Series 300 DPST safety interlock switch is designed for use with
safety monitored relays or monitored circuits. To achieve the optimum Series
300 defeat resistant feature of the 301-BT, both the switch circuit (Circuit 1)
and the tamper circuit (Circuit 2) must be connected. An optional third circuit
can be provided to indicate at the panel which guard is open.
Notes:
1. Environmental: Pollution Degree II
2. Correct use of this control device is an essential part of
proper machine cycle control.
3. Failure to follow ALL instructions could lead to serious
bodily injury or death.
4.Maintenance to be done by qualified personnel only.
5. The connecting cables between the INT devices and the switches
must be located in an IP 23 type enclosure (minimum).
6. The mounting for the switch and the actuator magnet must
be accomplished per this specification.
7. Non-removable hardware must be used for installation.
8. The housing of the 300-BT must be connected to the
PE (Primary Earth) ground circuit via a lock washer on
the mounting screw. The PE ground symbol must be
placed adjacent to the screw.
Safety Interlock Switch
300 Series
To verify switch operation with an ohmmeter:
Set range at 20 mega ohms (switches with triac output, set ohm
range at 20 kilo ohms). For a normally open switch, the meter will
read a high impedance with the actuator away. It will read high kilo
ohm to infinity range) with the actuator within sense range. You will
see the opposite reading for a normally closed switch.
Dimensions
301-BT
301-BT-SPNHJ6
301-BT-SPNHJ12
301-BT-SPNHJ15
301-BT-SPNHJ25
301-B3T-SPNHJ12
301-B3T-SPNHJ25
Industrial Contacts
Safety Switches
303-BT
303-BT-SPNHJ6
303-BT-SPNHJ12
303-BT-SPNHK12
0.67''
1.70cm
3.07''
7.80cm
1.75''
4.45cm
0.74''
1.88cm
0.98''
2.49cm 0.57''
1.45cm
3.07''
7.80cm 0.66''
1.68cm
0.20''
0.51cm
0.16'' x 0.24''
0.41cm x 0.61cm
slot
1.48''
3.76cm
0.40''
1.02cm
2.13''
5.41cm
0.69''
1.75cm
Interlock Switches_300 Series.qxd 5/29/08 1:56 PM Page 1