S1-A Heat Trace Controller - RTD & Thermistor With Modbus and BACnet connectivity

The S1 is a single-circuit IoT heat trace controller for use in snow melting, freeze protection and temperature maintenance applications. The device can drive up to a 30A resistive load to control electric heat trace systems operating between 110 VAC and 277 VAC. The S1 comes in an outdoor rated enclosure tested to IP67 standard.

WiFi/Ethernet
Supports WiFi & 100Mbps Ethernet connections. The devices are designed to use 802.11n Wi-Fi operating in the 2.4GHz band or the 5GHz band. Both units are compatible with older 2.4GHz 802.11b, 802.11g, and 802.11a networks.

Device Specifications

Connectivity

• WIFI 802.11 Dual Band 2.4 GHz & 5 GHz and Ethernet (RJ45, Cat 5 or 6)
• Dry-contact for alarms
• TIA/EIA 485 (RS-485): for Modbus
• BACnet IP or MS/TP via preconfigured SMC gateway

Power Ratings

• Supply Voltage: 120 to 277 Nominal VAC 50/60 Hz.
• Maximum Load: 30 A resistive
• Single phase power only (Note: 277 VAC is phase-to-neutral in 480/277 VAC 3- phase)
• Double-pole relay is safe for 240 VAC with two hot legs
• Wire size: 10-18 AWG

Agency Ratings

• UL 1053 (Ground-Fault Sensing and Relaying Equipment)
• FCC Part 15 Subpart B

Temperature Sensors

• Thermistor: 2-Wire shielded pair 24 AWG leads, 10k NTC thermistor with ± 1% accuracy, operating range of -40°C to 105°C
• RTD: Compatible with 3-Wire pt100 RTD (S1-A Only)

Enclosure/Environment

• Enclosure tested to IP67 and NEMA 4x
• Operating Temperature -30 °C to 70 °C
• Dimensions with mounting feet: H: 6.29 in. D: 3.625 in. W: 7.55 in.

Ground Fault Protection

• Programmable from 30 mA to 300 mA
• Manual and automatic test
• Fire protection mode allows user to disable GFEP