后缀S表示为DIN-固定插槽式的继电器

DELCON接口继电器和一般的机械继电器安装方式相同。

DELCON继电器有插件式和DIN-固定插槽式，DIN-固定插槽式的型号后缀为S，如SLO 24TR 和 SLO 24TRS. 详细的资料见PDF， DIN-rail input 和 DIN-railoutput

If the presoldered "S" version is used, then a bank of 16 of these can be connected together using the CAS 16-type adapters. This enables the use of the flat cable and PLC adapter system. It also makes available the test push buttons.