Simplex 677-202 — Simplex 677 series factory part number, offered as a 4098 detector base with relay.
Simplex catalogues its bases as 4098-xxxx models and runs 677-xxx numbers alongside as factory part numbers; the 4098 application manual identifies a chamber cover assembly as Part No. 677-224, from the same block. No Simplex publication maps 677-202 onto a 4098 model, so the 4098 number on the base governs — and two families answer to the words 4098 base with relay.
- Conventional relay bases 4098-9683 (2-wire) and 4098-9682 (4-wire), for 4098-96xx detectors on an IDC
- Their auxiliary contacts are rated 1 A at 28 VDC and 0.5 A at 125 VAC resistive, with only one relay base per zone
- TrueAlarm supervised relay bases 4098-9791 (4-wire, 2098-9737 relay, 18–32 VDC, 270 µA supervisory, 28 mA alarm) and 4098-9780 (2-wire, 4098-9860 relay)
- A relay in the box needs a 4" octagonal or square box with a 1-1/2" extension ring
Confirm the 4098 model before ordering. 4098-9792 is the standard TrueAlarm base with no options at all, 4098-9789 takes a remote LED but no supervised relay, and 4098-9822 is a relay module, not a base.
