If you look at the relay, the RS-1M-SH label shows the exact model you’re getting for easy matching.
OPCON 8582A ISOLATED NPN TRANSISTOR OUTPUT MODULE 100849 NEW CONDITION IN BOX
The PHOENIX branding is clear understated, a nice touch that keeps the focus on performance.
You will find that the 70*20*18mm / 2.75*0.78*0.7" size works well in modular builds.