The Ampac Three Input Device is designed to interface to a variety of plant control equipment such as sprinkler flow switches and fire fan control systems.
The Three Input Device incorporates three (3) monitored switched inputs. Each input can be used to supervise one or more normally open contacts connected to a single pair of cables with monitoring provided for both open and short circuit fault conditions. The Input circuits incorporate de-bounce circuitry for enhanced noise rejection and are protected against high transient voltages.
The Ampac Three Input Device is loop powered and includes bi-directional isolation circuitry for protection against detection loop short circuits. On board LED status indication is provided for service and commissioning purposes, a feature that can be deactivated during normal operation to reduce the current draw on the system.
Two packaging options are available. The ‘DIN Mount’ version enables the device to be mounted onto standard 35mm DIN rail or screwed direct to the back pan of a larger enclosure while the ‘Enclosed’ version allows the device to be surface mounted to a wall.
| Operating Voltage | 17 - 28 V dc |
| Operating Temperature | -20°C +70°C |
| Humidity | 0 to 95% Non-Condensing |
| Dimensions - DIN Mount | H 75mm x W 144mm x D 25mm |
| Dimensions - Enclosed | H 150mm x W 200mm x D 52mm |
| Material | Grey ABS |
| IP Rating | IP44 (Indoor Use) |
| 4210-0056 | Three Input Device DIN Mount |
| 4210-0057 | Three Input Device Enclosed |
