supply of relay qna1 ac immune plug in type style, -series line relay ( qna1 type ) , ac immunized, 8f / 8b, 24 v dc along with plug board ( base plate ) , connectors, retaining clips etc and conforming to brs-931a and rdso specn.no.irs:sa s-23 and s-60 or latest. the interlocking code for this unit shall be abdgh. [ warranty period: 30 months after the date of delivery ] , relay qna1 ac immune plug in type style neutral line 24 v dc 12f / 4b, brs: 931a, irs: s 60, irs: s 34 & irs: s 23.the interlocking code for this unit shall be abdfh [ warranty period: 30 months after the date of delivery ] , relay, ac immune, plug in type style qna1, dc neutral line 24vdc, 8f / 8b contacts, front and back contacts metal to carbon with plug board, retaining clip and connectors confirming to brs:931a, irs-s-60, irs-s- 23 ( as applicable ) the interlocked code for this unit shall be abdgh or latest. [ warranty period: 30 months after the date of delivery ]