Guralp Systems Limited
MAN-C3E-0003 - CMG-3EX Operator's Manual Addendum

Chapter 6. Configuration cable

J1 is a standard 26-pin bayonet free socket, conforming to MIL‑DTL‑26482 (formerly MIL‑C‑26482). Typical part-numbers include the digits 16‑26, denoting 26 ways in a size-16 shell. Suitable connectors are available from Amphenol, ITT Cannon and other manufacturers.

J2 is a standard DE9F (TIA-574) sub-miniature (D-sub) line socket, conforming to DIN 41652 and MIL-DTL-24308. They are very widely available.

The two should be connected by two-core cable with an overall screen, wired as indicated in the following table. The cable screen should be connected to signal ground.

J1 pin

Function

J2 pin

Z

Data to PC
(RS232 RxD)

2

a

Data from instrument
(RS232 TxD)

3

W, X and Y

Signal ground

5

Pins not mentioned above should be left unconnected.