Siemens HTRI-S (500-033370) — intelligent single-input interface module.
Reach for the HTRI-S when a dry contact must appear on the panel as its own addressable point: a waterflow switch, a valve tamper, a duct detector contact. It monitors one N.O. or N.C. contact and reports its state to the panel over the intelligent device loop. It carries no relay, so it is monitor-only.
- Single input, one N.O. or N.C. dry contact, one address
- Two-wire, polarity insensitive, dynamically supervised; 1.3 mA draw
- Shares the loop with Siemens H-series detectors, HMS-series manual stations, HZM and HCP modules
- Address set electronically with the Model DPU programmer, not DIP switches
- Multi-color LED: green normal, amber trouble, red change of state
- 32 to 120 °F (0 to 49 °C), up to 93% RH
- Mounts in a 4 in square, 2-1/4 in deep or double-gang box
HTRI-S is monitor-only; HTRI-R adds a Form C relay and HTRI-D is dual-input — not interchangeable. Marine work also needs the USCG-HPLATE cover plate, sold separately.
