Ansaldo STS Microlok II User Manual

Microlok II System Startup, Troubleshooting, and Maintenance UNION SWITCH & SIGNAL
SM-6800C Rev. 2.5 September 2000 2-13
2.11 CODED TRACK CIRCUIT PRINTED CIRCUIT BOARDS (Figure 2-8)
Fig. 2-8 Ref Label Device Purpose
1
TRACK SIGNALS +
(MASTER)
red LED When flashing, indicates Master track circuit “+” code
pulse (alternating with −
−−
− LED).
When dark, no Master track circuit activity.
2
TRACK SIGNALS −
−−
−
(MASTER)
red LED When flashing, indicates Master track circuit “-” code
pulse (alternating with + LED).
When dark, no Master track circuit activity.
3
RECEIVE
(MASTER)
red LED When lit, indicates code received from Slave end of
track circuit.
When dark, indicates code transmission to Slave end
of track circuit.
4
VALID MESSAGE
RECEIVED
(MASTER)
red LED When lit, indicates valid message received from Slave
end of track circuit.
When dark, indicates Master end track circuit message
not accepted (track circuit shunted or in remove-shunt
mode).
5
TRACK SIGNALS +
(SLAVE)
red LED When flashing, indicates Slave track circuit “+” code
pulse (alternating with −
−−
− LED).
When dark, no Slave track circuit activity.
6
TRACK SIGNALS −
−−
−
(SLAVE)
red LED When flashing, indicates Slave track circuit “-” code
pulse (alternating with + LED).
When dark, no Slave track circuit activity.
7
RECEIVE
(SLAVE)
red LED When lit, indicates code received from Master end of
track circuit.
When dark, indicates code transmission to Master end
of track circuit.
8
VALID MESSAGE
RECEIVED
(SLAVE)
red LED When lit, indicates valid message received from
Master end of track circuit.
When dark, indicates Slave end track circuit message
not accepted (track circuit shunted or in remove-shunt
mode).

Ansaldo STS Microlok II Specifications

General

Brand	Ansaldo STS
Model	Microlok II
Category	Controller
Language	English