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Black serial cable with RS232 and RJ9 connectors

iOptron

iOptron RS232 to RJ9 serial cable for CEM25 CEM60 iEQ30 Pro iEQ45 Pro ZEQ25 SmartEQ StarFi 8434

SKU CH-5BPA-YDG72

Connects iOptron mounts including CEM25, CEM60, iEQ30 Pro, iEQ45 Pro, ZEQ25 and SmartEQ to a computer or StarFi 8434 via RS232 to RJ9 serial link

  • Connect your iOptron mount to a computer via RS232 to RJ9 cable
  • Control CEM60, CEM25, iEQ45 Pro, iEQ30 Pro, ZEQ25 and SmartEQ mounts
  • Link StarFi wireless adapter #8434 for remote operation
  • Durable construction withstands frequent field use
  • Enables precise telescope control for astrophotography sessions

Connection for iOptron mounts

This RS232 to RJ9 serial cable links compatible iOptron mounts directly to a computer or wireless adapter. It supports models including the CEM25, CEM60, iEQ30 Pro, iEQ45 Pro, ZEQ25 and SmartEQ series. The connection enables precise telescope control for astrophotography and visual observation sessions.

Replaces ad-hoc adapters

The cable removes the need for improvised wiring or third-party converters when connecting a mount to a PC. Its dedicated pin-out matches the RJ9 port on supported mounts and the RS232 interface on the computer side. This ensures reliable data transfer without driver conflicts or intermittent connections.

Durable construction for field use

Built from robust materials, the cable withstands repeated connection cycles in outdoor observing conditions. The secure RJ9 and RS232 connectors resist accidental dislodging during long imaging runs. It is not suited for mounts lacking an RJ9 hand-controller port or for USB-only computer ports without a serial adapter.

How it compares

Measured against everything we stock in Binoculars, Scopes & Sights, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 80% of the 1,401 comparable items (median $93.99).

Specifications

No published specifications for this item yet.

Questions about this item

Will the RJ9 connector on the iOptron cable wear out from repeated plugging into the StarFi 8434?

The RJ9 plug is rated for standard mating cycles; avoid side strain on the jack when connecting the StarFi 8434.

What is the practical length limit of the RS232 link before handshake errors appear on a CEM60?

RS232 signalling degrades beyond the cable length supplied; keep the total run within that length for reliable CEM60 control.

Does the cable draw enough power from the RS232 port to heat up during an all-night imaging run on an iEQ45 Pro?

It is a passive cable with no active electronics, so it generates no measurable heat during extended iEQ45 Pro sessions.

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