R1078 1" Diameter Steel Door
Magnetic Contacts
Installation Instructions
1. Drill a 1" diameter and 1 1/8" deep hole for the contact. Hole saw arbors are available from
Sentrol.
2. Connect the contact leads to the security system loop and test continuity.
3. The 1840 Magnet is designed to be mounted in the top channel of a metal entry/exit door.
The magnet can be rotated to accommodate either wide or narrow topchannels.
4. Clean the top channel of the door.
5. Position the magnet opposite the switch in the top of the door channel.
6. Lightly coat the contact and magnet with RTV mounting compound (Sentrol part number
1905) and mount into respective locations.
1.13"
2.86cm
1.13"
2.86cm
0.89"
2.26cm
1.63"
4.13cm
0.63"
1.59cm
1.81"
4.60cm
0.50"
1.27cm
Magnet
Part No. 1840
(included)
UL S pecifications **European Union Specifications: 48 V AC/DC Max., 0.5 Amp
Part Loop Electrical Gap Distance
Number Type Configuration In Steel*
R1078 Closed N/O 5/8"
**FORM A (R1078)
Volt age: 100 V AC/DC Max
Current: 0.5 A Max
Power: 7.5 W Max
*Gap Specifications are nominal and may vary ±20% due
to temperature. Gap Specifications are for switch to
make. Break distance is approximately 1.1 to 1.5 times
make.
ULC Specifications
All Contacts: 30 VDC, 50 ma max. Gap Specifications:*
See UL Gap Specifcations
13814 Rev C 11/01