Edwards / EST (SIGA-CT1) Single Input Module

The Edwards SIGA-CT1 is an intelligent, addressable Single Input Module. Specifically, it connects one Class B normally-open dry contact initiating device circuit to the Edwards Signature Series SLC. As a result, conventional contact-based devices can report through a single address on the addressable loop.

The module’s behavior is set by one of four personality codes. Therefore, the same hardware can act as an alarm input, a waterflow input, a monitor input, or a supervisory input.

How the Edwards SIGA-CT1 Works

First, the connected initiating device closes its dry contact. Then, the module’s on-board microprocessor evaluates the input and reports to the Signature loop controller. In addition, the module continues to function in stand-alone mode if loop polling stops temporarily — supporting the panel’s required fail-safe operation.

A 47K end-of-line resistor terminates the supervised initiating device circuit. Furthermore, the module uses electronic addressing — the loop controller (or the SIGA-PRO service tool) assigns the address. As a result, there are no DIP switches or rotary dials to set in the field.

Personality Codes — Four Configurable Behaviors

• Code 1 — Alarm, Latching: For pull stations, heat detectors, and similar Class B initiating devices.
• Code 2 — Alarm, Delayed Latching (~16 sec): For waterflow alarm switches that require a built-in retard.
• Code 3 — Active, Non-Latching: For monitor inputs from fans, dampers, doors, and similar devices.
• Code 4 — Active, Latching: For supervisory and tamper switches that should hold their state until reset.

Key Features

• One Class B normally-open dry contact IDC input
• Uses 1 address on the Signature SLC
• Selectable personality codes — alarm, delayed alarm, active monitor, supervisory
• Electronic addressing — no DIP switches or dials
• Automatic device mapping on the Signature loop
• Stand-alone operation if loop polling pauses
• Non-volatile memory stores serial number, device type, and job number
• Ground fault detection per address
• Green LED for polling, red LED for alarm/active
• Mounts in a standard North American 1-gang or 4″ square electrical box
• UL, ULC, MEA, and CSFM listed

Specifications

• Module type: Single input, Class B, normally-open contact
• Type code: 48 (factory set)
• Address use: 1 module address
• Operating voltage: 15.2 to 19.95 Vdc (19 Vdc nominal)
• Operating current: 250 µA standby / 400 µA active
• Operating temperature: 32°F to 120°F (0°C to 49°C)
• Humidity: 0 to 93% RH, non-condensing
• Wire range: #12 to #18 AWG
• IDC wire limits: 50 Ω total per circuit (25 Ω per wire); 0.1 µF capacitance per circuit
• Maximum IDC distance: 4,000 ft (1,219 m) to EOL resistor
• EOL resistor: 47 KΩ
• Weight: 0.4 lb (0.15 kg)
• Datasheet: Edwards / GE Security 85001-0241

Compatibility

The Edwards SIGA-CT1 communicates only with the Edwards Signature Loop Controller. Therefore, it works with Signature-equipped Edwards panels such as the EST3, EST3X, iO Series, and QuickStart-ES. Always confirm panel compatibility against the firmware revision in your system.

Important Application Note

The SIGA-CT1 will not support 2-wire smoke detectors. Specifically, it is designed only for dry-contact initiating devices and monitor inputs. For 2-wire smoke detection, use the appropriate Signature 2-wire smoke detector interface instead.

Order the Edwards SIGA-CT1

Life Safety Consultants stocks the Edwards SIGA-CT1 along with the Signature Series module family. To confirm the right personality code for your application or place an order, call 1-888-557-0558. Alternatively, email sales@lifesafetycom.com.

For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com