INTERFACES
Switch Monitor
Designed to monitor the state of one or more single-pole, volt-free contacts connected on a single pair of cables. Reports open and short-circuit faults on the circuit. The device produces the output states normal, fault, pre-alarm and alarm.
Mini Switch Monitor
Identical in function to the Switch Monitor.
Mini Switch Monitor (Interrupt)
This device performs the same task as the standard Mini Switch Monitor, but incorporates an interrupt facility as in the Apollo analogue-compatible manual call point. It is used to monitor equipment where a fast response is required. It has no pre-alarm signal facility.
Switch Monitor Plus
This product has the same functionality as the standard Switch Monitor, but incorporates additional circuitry to monitor flow switches and provide a time delay in so doing. It also contains circuitry which can be used to reset a beam detector.
Zone Monitor
The Zone Monitor powers and controls the operation of a zone of conventional detectors. This device has an input voltage, derived from the analogue loop, of 14 to 28V and provision is made for the inclusion of an active end-of-line device. The DIN-rail version incorporates dual short-circuit isolation.
Sounder Control Unit
This unit is designed to control a zone of sounders powered by an external DC supply. The sounders will be switched to sound continuously or be pulsed, 1s on, 1s off. Sounder Control Units at different addresses may be controlled individually or in selectable groups and have a facility for synchronising the outputs, when being pulsed.
Input/Output Unit
This unit provides a loop-powered relay, a monitored input and an unmonitored opto-coupled input. It can report fault, switch open and switch closed levels.
Output Unit
The Output Unit is a simplified version of the Input/Output Unit without circuitry for monitoring inputs.
Dual Isolator
The Dual Isolator provides two independent isolators which sense and isolate short circuits on XP95 and Discovery loops and spurs.
Mains Switching Input/Output Unit
The Mains Switching Input/Output Unit provides a voltage-free, single pole change-over relay output and a monitored switch input. This unit is designed to switch machinery operating at 230V, thus obviating the need for an intermediate relay and a power supply.
Three Channel Input/Output Unit
The Three Channel Input/Output Unit provides three voltage-free, single pole, change-over relay outputs and three monitored switch inputs. The unit is designed to supervise one or more normally open switches on each of the three inputs.
Please note these products are in a special enclosure.
