Protecting the divertor in a nuclear fusion power plant is a key criteria for operation. Detailed divertor and scrape-off-layer (SOL) modelling is computationally intensive and unsuitable for a systems code. For the use of such models in systems codes they need to be simplified and made computationally fast, while still capturing the most important physical processes. This paper details the benchmarking of a 1-D divertor and SOL model in the systems code PROCESS with the 2-D divertor model SONIC. The comparison looks at how the models handle the power loss mechanisms from the outboard midplane to the outer divertor target for a DEMO-like scenario. Details of the scenario used for the comparison, the input/output assumptions and how the 1-D model is used for systems codes analysis are provided. The goal of the divertor model in the systems code is to enforce an engineering limit on the divertor power density while checking the upstream power crossing the separatrix is consistent with this. This will allow the systems code to capture the divertor engineering requirements and trade-off the performance of the machine to satisfy the constraints. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053 and from the RCUK Energy Programme [grant number EP/I501045]. The views and opinions expressed herein do not necessarily reflect those of the European Commission.