1794-OE12 New Sealed 1794OE12 Ser A Flex I/O 12-Channel Analog Output Module
PRODUCT DETAILS
1794-OE12 — FLEX I/O 12-Channel Analog Output Module
The 1794-OE12 is a 12-channel analog output module for the 1794 FLEX I/O system, with each channel independently configurable for voltage (0–10V, ±10V) or current (0–20 mA, 4–20 mA) output. Twelve channels in one module slot keeps high analog point counts manageable in distributed I/O nodes serving multiple process loops, drive speed references, or valve positioner setpoints from a single physical location.
Specifications
| Parameter | Value |
|---|---|
| Part Number | 1794-OE12 |
| Platform | FLEX I/O (1794) |
| Output Channels | 12 |
| Voltage Ranges | 0–10V, ±10V |
| Current Ranges | 0–20 mA, 4–20 mA |
| Resolution | 16-bit |
| Channel Isolation | Not isolated — channels share common |
| External Loop Supply | 24V DC (user-supplied, for current mode) |
| Operating Temperature | 0°C to 55°C |
Twelve Channels, One Slot
Process and motion applications with many analog output points — multiple drive speed references on a multi-axis machine, a bank of valve positioners on a process skid, or setpoint signals distributed across several instrument loops — quickly accumulate output module count if each module only covers a handful of channels. The 1794-OE12's twelve-channel density reduces the FLEX I/O node's physical footprint and slot count for these applications, important in distributed installations where the node itself is mounted close to the field devices in a compact enclosure.
Because each channel configures independently for voltage or current mode, a single module can mix output types — some channels driving 4–20 mA valve positioners while others provide 0–10V speed references to nearby drives, all from one module without needing separate hardware for each signal type.
FAQ
Q: Can mixed signal types be assigned across the 12 channels?
Yes. Each channel is configured independently — voltage and current modes can be freely mixed across the module's 12 outputs based on what each connected field device requires.
Q: Does the module provide loop power for current-mode channels?
No. An external 24V DC loop supply must be connected via the terminal base for channels configured in current mode — the module reads and controls the loop current but doesn't source the supply voltage itself.
Q: Since the channels aren't isolated, what's the risk with mixed-vendor field devices?
Connecting devices with different ground references to a non-isolated module can introduce common-mode noise or offset errors. If field devices come from electrically separate systems, individual signal isolators between the device and the module are recommended.
Q: What happens to outputs if the FLEX I/O network connection is lost?
Output behavior on connection loss is configurable per channel — typically hold last value or go to a defined fail-safe value — set according to each connected device's safe-state requirement.