System Sensor IST200 User Manual

D500-50-00
Pittway Tecnologica S.r.l, Via Caboto 19/3, 34147 Trieste, Italy
I56-2629-004
110 mm
107.5 mm
1
2 3
4
5 6
7
8
9
10 11
12
20 mm
MODEL Y72221 GALVANIC ISOLATORS
The Y72221 is a single channel transformer isolated repeater especially designed and
manufactured by Pepperl and Fuchs for use as an intrinisically safe isolator between the
IST200 translator module and up to 15 22051EISE and 2251EIS optical smoke sensors.
The Y72221 is certified intrinsically safe EEx ia IIC.
SPECIFICATIONS
Voltage Range: Input (Safe Side) 20 to 24VDC
Output (To Hazardous Area) 0.6 to 24VDC
Current Range: 1 to 20mA
Short Circuit Current (Output): 65mA maximum
Working Temperature Range: -20°C to 60°C
Weight: 100g approx
INSTALLATION AND WIRING
The Y72221 should be mounted inside a suitable enclosure in the safe area. See Figures
2 and 3 for wiring details.
CAUTION
Y72221 Galvanic isolators comprise part of an intrinsically safe system for use in
potentially flammable atmospheres, and must be installed in accordance with all
appropriate international, national and local standard codes of practice and site
regulations for intrinsically safe apparatus.
Figure 3: Y72221 Galvanic
Isolator IS Barrier

System Sensor IST200 Specifications

General

Brand	System Sensor
Model	IST200
Category	Electronic dictionary
Language	English