Omron's G9SX-ADA222-T150-RT is a Flexible Safety Unit in the Advanced (ADA) series, rated for 24 VDC supply with a −15% to +10% tolerance. It packs two instantaneous safety outputs and two OFF-delayed safety outputs (P-channel MOS FET, 1 A DC max. when using two or fewer outputs, 0.8 A DC max. with three or more), plus two auxiliary PNP transistor outputs rated 100 mA each. The OFF-delay is adjustable up to 150 seconds — that's the T150 suffix — and all terminations land on screw terminals.
The 24 VDC rail powers the unit at 4 W max. Safety inputs accept 20.4 to 26.4 VDC with an internal impedance around 2.8 kΩ — so a standard 24 VDC sensor or e-stop circuit drives them directly. The 150-second OFF-delay timer is the headline feature: it holds the delayed outputs ON after the safety input drops, useful for controlled stops or door interlocks where a machine needs time to coast down. Watch the output derating: if you parallel all four safety outputs (both instantaneous and both delayed), total load must stay under 0.8 A DC, not the per-output 1 A.