Figure 9: Connecting 2-Wire Alarm Initiating Devices - Secutron MR-2602 Installation Manual

Terminal
Description
Label
Common Alarm relay, Normally Closed contact
The Common Alarm relay is normally de-energized.
ALM NC
Contact is shown in the de-energized state.
Contacts are rated 30 V
Z1+ Zone 1 positive input
Zone 1 negative input
Zone output is 24 V
Z1-
draw is 60 mA in alarm and is limited by the zone circuitry. Zones may be configured to
monitor both 2-wire smoke detectors and initiating devices that employ dry contacts.
(manual stations & heat detectors)
Z2+ Same as zone 1 positive
Z2- Same as zone 1 negative
For each supervised installation wire, a separate terminal must be used.
Note:

Figure 9: Connecting 2-Wire Alarm Initiating Devices

Typical
* See "9.0 Appendix: Table of Compatible Smoke Detectors" on page 33 in this manual for a list of
compatible 2-wire smoke detectors
1. Maximum 30 smoke detectors per zone (100 µA each standby).
2. Manual station, heat detector.
3. Maximum total loop wire resistance = 100 ohms.
4. Program zone as:
Type 1 - Smoke and contact devices instant alarm (default)
Type 2 - Smoke auto-verify and contact as instant.
, 2 Amps max.
DC
nominal to power 2-wire smoke detectors. Maximum current
DC
MR-2602 Installation & Operator's Manual
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