Description
8-channel sourcing transistor (PNP) DC output module, 12–24 VDC rated, opto-isolated for noise immunity. Low on-voltage drop and fast switching make it suitable for frequent DC switching of indicators and small actuators. Removable terminal blocks included for straightforward wiring.
The Polar Energy Assessment:
The TP08A provides eight sourcing transistor outputs in the XGB expansion form factor, rated at 0.5 A per point with a 2 A common, typical load voltage range 10.2–26.4 VDC, and on-voltage drop around 0.4 V. It features photocoupler insulation, Zener surge protection, 1 ms or faster response times, and modest expansion power consumption, making it a reliable option for moderate DC loads where relay outputs are overkill.
Pros
- Fast switching and high cycle life compared with mechanical relays.
- Low on-voltage drop, good for efficient DC drives.
- Compact 8-point granularity for flexible panel layouts.
Limitations
- Sourcing (PNP) only, so wiring must match field device polarity.
- 5 A per point limits direct drive of heavier loads. Use drivers or contactors for larger currents.
Typical use cases
- Indicator banks, small DC valves via appropriate drivers, and PLC-driven solid state switching where frequent cycles are expected.

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