SPD-1 A兑币出售机是一台多功能的邮政营业设备。它可以接纳一角、二角纸币,或一、二、五分硬币,出售四分、八分、一角三种邮票;也可以将纸币兑换成等额硬币。YDB-1兑币机具有将一角、二角纸币兑换成硬币的功能,是邮政营业配套设备。本文介绍上述两机的逻辑控制电路。一、SPD-1 A兑币出售机框图简介(图1) The SPD-1 A coin dispenser is a versatile postal facility. It can accept a corner, the second banknote, or one, two, five cents, sell quarter, eight, one corner of the three stamps; also be converted into equal amount of coins. YDB-1 Vulcanizer has the corner, the role of dimes into coins, postal business supporting equipment. This article describes the two machines logic control circuit. First, the SPD-1 A currency sale block diagram Introduction (Figure 1)