16-6 hazardous location & pneumatic switches galvanic isolator description the galvanic isolators are active protective interface assemblies to isolate intrinsically safe circuits from non intrinsically safe circuits to worldwide standards. galvanic isolators offer economical solutions for instrumentation and control systems in hazardous locations. unlike zener diode barriers, galvanic isolators do not require grounding. allen-bradley?s galvanic isolators provide 1500 volt isolation between hazardous area and non hazardous area terminals and 500 volt isolation between input/output and external power terminals. dip switches provide convenient programming for output or diagnostic functions. multiple leds allow easy visual indication of module and circuit status. wiring for intrinsically safe systems must be identified as such through the use of light blue jacketing and/or through appropriate labels. such labels are required by nec article 504 and ansi/isa rp-12.6 to be placed at no more than 25 foot intervals. when installing intrinsically safe equipment the user should refer to all relevant national standards and/or those standards set forth by the ?authority having jurisdiction? at the installation site. features ? galvanic isolation input-to-output ? reverse polarity protected ? 500v isolation between input and output ? no separate intrinsically safe grounding required ? 18mm (0.71in) wide housing ? 35mm din rail mount approved specifications entity table standards en50020-en50039, fm3610, csa22.2 no.157, ul913 approvals fm, csa, ul, cenelec (ptb) approved and ce marked for all applicable directives power supply 32ma @ 18-35v dc number of inputs 2 signal range 8v @ 8.2ma input switching current on > 2.1ma off < 1.2ma input resistance 1000 ohms isolation protection 1500v output 2 x spst output contact rating 2a/250v ac, 2a/120v ac, 2a/24v dc switching frequency 15hz switch delay on to off off to on 15ms 15ms indication leds green = power yellow = output closed red = wire break/short operating temperature -20 c to +65 c (-4 f to +149 f) humidity 95% rh housing material polyamide 6gf enclosure protection ip30 mounting 35mm din rail conductor size 0.2-2.5mm 2 (24-14awg) weight 120g (0.26lbs) mechanical contact life 20,000,000 cycles groups voc isc ca la a, b 10.6v 29.7ma 2.5uf 40mh c, d, e,f, g 15uf 150mh
hazardous location & pneumatic switches 16-7 galvanic isolator product selection approximate dimensionsmm (inches) block diagram typical wiring diagrams product external power output type catalog number galvanic isolator 32ma @ 18-35vdc spst 2a @ 250v ac 897H-G231 1 7 9 5 2 3 8 + - 1 2 3 4 1 1 1 1 18 (0.71) 114 (4.5) 80 (3.15) dip switch settings a1 1 7 9 5 2 3 13 23 33 a2 14 24 34 m k1 k2 l1 l2 l3 k1 8 l+ l- 1 2 3 4 1 1 1 1 k1 7 9 8 7 9 8 dip switch settings galvanic isolator 897H-G231 hazardous location u.s. class i, ii, iii, div 1, 2 european zone 0, 1, 2, eexia iib see entity parameters for 897h for groups non hazardous location 440k tongue interlock 6.8k resistors 1492-wd4ra682 24v dc start stop k1 (aux) k2 (aux) reset bulletin 800e latching e-stop input input mc mc minotaur dual channel safety relay safety gate open ground 6.8k resistor 1492-wd4ra682 440f matguard pressure sensitive safety mat 440f guardedge pressure sensitive sensing edge
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