CC-TDOB11 — Honeywell Series C Redundant 24 V Bussed Digital Output IOTA

CC-TDOB11 is the redundant, 12-inch termination assembly for Honeywell’s 24 VDC bussed digital output path. The electronics module that mounts on it is CC-PDOB01 (32 source-type, field-isolated, bussed outputs). The non-redundant sibling IOTA is CC-TDOB01 (9 inch). HKXY Instruments is a China industrial automation trader with 15 years of export experience, not the OEM.

Product identity

Bussed 24 V output behavior (via CC-PDOB01)

Honeywell EP03-490-520 section 5.16 describes the bussed 24 VDC digital output as sharing a common return. Field excitation can come from the Series C system supply or an external 24 V supply; an external source can galvanically isolate the outputs from the Series C power system. Outputs are source type. Documented load limits (absolute maximum, no-short condition):

• 0.5 A per channel
• 4 A per group of eight channels (channels 1–8, 9–16, 17–24, 25–32)
• 6 A per module

If shorted channels are present, Honeywell reduces the allowable group current (3 A with one short condition, 1.5 A with two) before protection disables the function. Galvanic isolation is specified as 1500 VAC RMS or ±1500 VDC. Typical on-state voltage is 24 V at 0.5 A; turn-on/turn-off time is 10 ms maximum; redundant switchover gap is documented as 0 ms.

The IOP provides fuse-less short-circuit protection: a shorted channel is detected and de-energized until the fault is cleared, rather than relying on replaceable fuses. Each channel can be configured latched, pulsed, or PWM, with direct/reverse action and per-channel FAILOPT (hold last value or shed to a user-defined safe value).

When you need a different DO IOTA

• Dry-contact / mixed voltage loads belong on the relay IOTA path (CC-TDOR01 / CC-TDOR11, still using the CC-PDOB01 IOP).
• Sink-type 24 V outputs belong on CC-PDOD51 with CC-TDOD51 / CC-TDOD61.
• A non-redundant 9-inch cabinet opening is CC-TDOB01, not CC-TDOB11.

RFQ checklist

1. Photograph CC-TDOB11 and the mounted CC-PDOB01 (see also the CC-PDOB01 page — confirm the live title; the part is a digital output module).
2. Record whether field power is internal or external and the load current per channel and per 8-channel group.
3. Note solenoid vs interposing-relay loads, PWM/pulse usage, and FAILOPT settings.
4. Confirm you do not actually need the relay IOTA (CC-TDOR*) for isolated dry contacts.
5. Quantity and destination. Stock, price, and lead time are [TO CONFIRM].

Related Honeywell pages

Comparison only.

FAQ

Is CC-TDOB11 the digital output module?
It is the redundant IOTA. The IOP is CC-PDOB01.

How much load can each channel drive?
Honeywell’s absolute maximum is 0.5 A per channel, with additional 4 A per 8-channel group and 6 A per module limits. Size solenoids against all three numbers.

Are the outputs isolated from each other?
They are bussed: all outputs share a common return. Isolation is specified as field isolation of the output group (1500 VAC RMS or ±1500 VDC), not independent per-channel dry contacts. Use the relay IOTA if you need Form A/B contacts.

What is the difference versus CC-TDOB01?
CC-TDOB01 is the 9-inch non-redundant IOTA; CC-TDOB11 is the 12-inch redundant assembly.

Do you list stock here?
No. Availability is [TO CONFIRM] after label review.