Schnittstellenvert.mc18/20, e Graupner 4181.3 This distributor is retrofittable into transmitters mc-18 (type 90)* and mc-20. This permits wiring in parallel to the transmitter of supplementary systems, such as PROFI-TRIM module (No. 4109), PC-Interface mc-18 - mc-20/PC (No. 4181.2) extension module for instructor/
student single-function transfer (No. 3290.2) and rev-counter (No. 4813).
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