Rotational Monitor

Product details



Overspeed/underspeed monitor - a.c. powered

This isolated barrier is used for intrinsic safety applications. It monitors for an overspeed or underspeed condition of a discrete signal (NAMUR sensor/mechanical contact) from a hazardous area by comparing the input frequency to the user programmed reference frequency.

An overspeed or underspeed condition is signaled via the relay outputs. Line fault detection of the field circuit is indicated by a red LED and relay. The start-up override feature sets relay outputs to default conditions programmed by the user for up to 1,000 seconds.

The unit is easily programmed by the use of a keypad located on the front of the unit.

Technical specification
Supply voltage:	207-253V a.c.
Input/Output:	Digital input
No. of Channels:	1
Output I, II:	Signal relay
Input I:
Rated values:	acc. to EN 60947-5-6 (NAMUR)
Pulse duration:	>50μs
Input frequency:	0.001 to 5000Hz
Lead monitoring:
Breakage I:	≤0.15mA
Short-circuit I:	>6.5mA
Input II:	Start-up override: 1-1000s,
	adjustable in steps of 1s
Active/passive:	1 >4mA (for min. 100ms)/1 <1mA
Open circuit voltage:	18V
Short circuit:	5mA
Ambient temperature:	-20 to +60°C
Protection rating:	IP20
Mounting:	35mm DIN rail or panel mount
Dimensions:	w40 x h119 x d115mm

Features:

3 port galvanic isolation

Single-channel isolated barrier

115V a.c. supply

Dry contact or NAMUR inputs

Input frequency 1mHz to 5kHz

2 relay contact outputs

Start-up override

Configurable by keypad

Line fault detection (LFD)

Up to SIL2 acc. to IEC 61508/IEC 61511

DIN rail/power rail solutions

Removable terminals reduce maintenance time

Fault detection and local indication