EDWARDS SIGA-WTM Waterflow Tamper Module

The Edwards SIGA-WTM is an intelligent addressable waterflow and tamper interface module for Edwards Signature Series loops. Specifically, it monitors one waterflow switch and one supervisory or tamper switch on a sprinkler system. As a result, both signals arrive at the panel as individually identified points.

In addition, the SIGA-WTM uses two device addresses on the Signature loop. Therefore, the panel can distinguish a waterflow alarm from a tamper or supervisory condition without ambiguity.

How the Edwards SIGA-WTM Works

First, the waterflow input includes a built-in retard timer of approximately 16 seconds. As a result, momentary water pressure surges do not generate false alarms. Then, after the retard expires, the module reports a latching waterflow alarm.

Furthermore, the second input handles tamper or supervisory switches. Specifically, it latches on any active condition and clears only after the panel issues a reset.

In addition, the module uses electronic addressing. Therefore, no dip switches or rotary dials are required during installation.

Critical Compatibility Note

The SIGA-WTM does NOT support 2-wire smoke detectors. Therefore, do not connect conventional 2-wire smoke detectors to either input. Instead, use a SIGA-CC1 or SIGA-MM1 configured for the appropriate input type.

Specifications

• Function: Intelligent waterflow + tamper/supervisory monitor module
• Inputs: 2 × Class B (waterflow ~16 s retard; tamper/supervisory latching)
• Addresses used: 2 (one per input)
• Power: 15.2 to 19.95 VDC from the Signature SLC
• Current: 396 µA standby; 680 µA active
• Status LEDs: Green (polled) and red (active/alarm)
• IDC loop limits: 50 Ω total, 0.1 µF maximum per circuit
• Mounting: Standard 1-gang electrical box
• Does not support: 2-wire smoke detectors

Compatible Edwards Panels

The SIGA-WTM works with Edwards Signature-loop control panels. Specifically, it is compatible with:

• Edwards EST3
• Edwards EST3X
• Edwards iO Series controllers via the Signature Loop Controller

However, before ordering, verify your panel’s firmware revision against the current Edwards Signature compatibility list.