Two fieldbus gateways can look similar when you're scanning industrial networking parts, but the Delta Tau ACC-72E and the Moxa 4101-MB-PBS are built for different corners of the plant floor. One is a low-cost interface card with a familiar part number; the other is a more expensive gateway with a clearly specified role. The decision comes down to which protocol your control network actually uses and how much condition risk you're willing to take on between a used card and an open-box module.
Quick verdict
If you want the lower listed price, the Delta Tau ACC-72E is the easy pick. It gives you a straightforward interface card for less money, and the used condition is the main trade-off. If you need a gateway that clearly defines its role, port count, and data-rate rating, the Moxa 4101-MB-PBS is the more targeted choice.
At a glance
| Product | Listed Price | Condition | Gateway Role | Price Bar |
|---|---|---|---|---|
| Delta Tau ACC-72E | USD 404.99 | Used | CAN/PROFIBUS interface card | |
| Moxa 4101-MB-PBS | USD 869.00 | Open box | Modbus-to-Profibus slave gateway, 1-port, 230.4 Kbps |
The price bar makes the cost gap visible, while the gateway role column highlights the protocol difference.
Where each product wins
- Delta Tau ACC-72E wins when the budget is the main constraint and you're comfortable with a used card. Its lower listed price and simple interface-card positioning make it the value pick.
- Moxa 4101-MB-PBS wins when you need a gateway with a defined slave role, a port count, and a data-rate rating. It is the more specification-heavy option, and the condition is the trade-off.
Product notes
Delta Tau ACC-72E
The Delta Tau ACC-72E is a CAN/PROFIBUS interface card with the model number ACC-72E. It carries a $404.99 price and a used condition, which makes it the budget-forward option in this pairing. If your network is built around CAN/PROFIBUS, this is the more direct match. The main limitation is the used condition; you'll want to inspect the card carefully before wiring it into a production line. The title clearly identifies the card's CAN/PROFIBUS role and gives you the exact model number. For a lower-cost fieldbus gateway card, this is a strong candidate. The ACC-72E part number gives you a clear cross-reference point for your parts list. When the budget is tight and the protocol is right, the used condition is a reasonable risk to manage.
Moxa 4101-MB-PBS
The Moxa 4101-MB-PBS is a 1-port Modbus-to-Profibus slave gateway with a 230.4 Kbps data rate. Its condition is open box, and the model number is clearly identified. This is the unit to choose when you need Modbus devices to communicate with a Profibus master. The single-port design suits a focused connection rather than a multi-drop setup. The biggest drawback is the price premium over the Delta Tau, plus the open-box condition. If your application requires the exact protocol conversion this gateway is named for, the Moxa is the appropriate piece of hardware. If not, the extra cost is hard to justify. The 0 to 55°C operating range gives you a temperature envelope to work with, which is useful when the gateway sits inside an industrial cabinet.
Final choice by use case
The decision comes down to two questions: what protocol does your control network use, and how much condition risk can you accept? If the answer points to a lower-cost interface card, the Delta Tau ACC-72E is the final pick. If it points to a gateway with a specific port and speed specification, the Moxa 4101-MB-PBS is worth the $464.01 spread. Match the equipment to the network, not the other way around.
