Specifications

RailCorp Engineering Manual — Signals — Equipment Manual

Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261

Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1

ii) If the Opto is upside down, the green base of the Opto can be pulled

apart and the circuit board remove and inserted correctly.

iii) Plug in the D15 connector. Tighten the thumbscrew to finger tight

ensuring the plastic hood does not distort.

iv) Plug the green 8 and 2 way connector into there respective sockets.

2.7 Cables

The cable pin connections for all of the cables are specified in Specification 1071, Level

Crossing Monitor Hardware. Copies are also in Appendix C of this document.

The following are the Drawing numbers in Specification 1071 for the particular cables

used:

Level Crossing Monitor to Input Optoisolator (No 1) M08-861

Level Crossing Monitor to VIOs (flasher cable) M08-862

Level Crossing Monitor to 8 way Output Optoisolator M08-873

Level Crossing Monitor Serial channel A to the Modem M08-863

If a cable is suspected of being faulty then you should check both end connectors and

ensure that the cable are securely attached. The cable should also be checked for

physical damage.

If still faulty then the cable should be checked for continuity and for shorts. If a fault is

found then the cable should be replaced with a new one.

2.8 Modem

The modem must support the Hayes AT command set as its factory default. Besides the

configuration commands for the particular modem it must in particular support the ATH,

ATD, and ATZ commands which are used by the Level Crossing Monitor software in

handling the modem.

The modems used must either operate from the Level Crossing Battery supply or be

separately battery backed up so that the Level Crossing Monitor can report loss of the

Council Supply. 240V mains supply modems should not be used with any level crossing

monitor utilising remote battery testing from a Control Centre.

Only the Dataplex DPX-213 operates from a 10-20V DC supply. This modem and the

previously supplied DPX-223 are currently the only ones used at level crossing

installations.

All installations are to be fitted with a ACA approved surge protection device fitted to the

phone line. This is required to protect the modem from electrical storms and surges. The

recommended unit Model PF-6/S is available from Elsafe (KCC) Australia Pty Ltd

Ph: 02 9938 5799. Please specify when ordering that you require the unit with the 2

metre earth lead. This unit consists of a small box with a 1 metre long phone lead which

plugs into the phone socket. The modem plugs into the socket on the unit and the

green/yellow earth lead is connected to the earth busbar. This earth lead should be kept

as short as possible. The earth lead should be kept separate from other cables and

should not have excessive bends or kinks.