GTT Canoga C924 Series, Installation Manual, Page: 16 / 81

Canoga™ Vehicle Detectors
Canoga™ C924X Series Installation Manual
10 – Hardware Installation
Table 3-1 C924X Vehicle Detector Card-Edge Connector Contact Assignments
Pin Function C924X Pin Function C924X
A Common of +VDC (0 VDC)

1 Synchronize Conductor 1

B +VDC (+10.8VDC to 38VDC)

2 Synchronize Conductor 2

C RESET External

3 No Connection
D Channel 1 Loop Input A

4 Channel 1 Redundant Loop Input A

E Channel 1 Loop Input B  5 Channel 1 Redundant Loop Input B 
F Channel 1 Switch/Call Output (C)  6 No Connection
H Channel 1 Switch/Call Output (E)

7 Channel 1 Disturbance Signal (OC)

J Channel 2 Loop Input A

8 Channel 2 Redundant Loop Input A

K Channel 2 Loop Input B

9 Channel 2 Redundant Loop Input B

L PE (Protective Earth)  10 No Connection
M No Connection 11 No Connection
N No Connection 12 No Connection
P Channel 3 Loop Input A

13 Channel 3 Redundant Loop Input A

R Channel 3 Loop Input B

14 Channel 3 Redundant Loop Input B

S Channel 3 Switch/Call Output (C)  15 No Connection
T Channel 3 Switch/Call Output (E)

16 Channel 3 Disturbance Signal (OC)

U Channel 4 Loop Input A

17 Channel 4 Redundant Loop Input A

V Channel 4 Loop Input B

18 Channel 4 Redundant Loop Input B

W Channel 2 Switch/Call Output (C)

19 TIA-485 (A- ) or TIA-232 (TX) with
M832 Option

X Channel 2 Switch/Call Output (E)

20 Channel 2 Disturbance Signal (OC)

Y Channel 4 Switch/Call Output (C)

21 TIA-485 (B+) or TIA-232 (RX) with
M832 Option

Z Channel 4 Switch/Call Output (E)  22 Channel 4 Disturbance Signal (OC) 
Pins 1 through 22 is on the top (component) side and pin A through Z is on the back (solder side).
Polarization keys are located at three positions: Between B/2 and C/3, Between M/11 and N/12, Between E/5 and F/6.