V3.8
OnTime Industrial Ethernet
U/R/T200 series Installation Guide
- 32 -
multiple GPS antennas/receivers are used with multiple T208 a true redundant system can be
built.
Installation procedure for connecting the Acutime 2000 to T200:
Color and # of Acutime RS-422 cable
Pin # on RS 422 connector
Violet 2
Pin 11
Orange 3
Pin 1
Brown 4
Pin 12
Yellow 5
Pin 2
Orange/White 11
Pin 4
Black/White 12
Pin 14
Black *
- Minus supply voltage (Ground) *
Red *
+ Plus supply voltage *
* Supply voltage is not present on RS-422 connector on switch. Supply voltage must be from external
power supply. (Reason is that the FS200 series of switches can operate on up to 60VDC, while the
Acutime 2000 requires 8-36VDC power supply). The Acutime can also be powered from the same
power source as the switch via the power plug if the switch is powered from external 24VDC.
See tables below for more details about signal routing.
Table 1 shows the pin-out of the T208 GPS interface connector, and table 2 shows the pin-
out of the Acutime 2000.
Pin nr
Function
Description
1
RS-422 TX +
RS-422 positive transmitter output to GPS
2
RS-422 RX +
RS-422 positive receiver input from GPS
3
PPX OUT2 TTL
OUT2, PPX output TTL signal
4
PPS RS-422 RX+
Pulse per second input from GPS RS-422 I/F
5
PPS TTL INPUT
Pulse per second input from GPS TTL level
6
PPX OUT1 TX-
OUT1, PPX RS-422 negative transmitter output
7
PPX/TTL 0V
Return path for RS232 and TTL signals
8
PPX OUT2 TX-
OUT2, PPX RS-422 negative transmitter output
9
PPX OUT1 TTL
OUT1, PPX output TTL signal
10
RS232/TTL 0V
Return path for RS232 and TTL signals
11
RS-422 TX-
RS-422 negative transmitter output to GPS
12
RS-422 RX-
RS-422 negative receiver input from GPS
13
PPX OUT2 TX+
OUT2, PPX RS-422 positive transmitter output
14
PPS RS-422 RX-
Pulse per second input from GPS RS-422 I/F
15
PPX OUT1 TX+
OUT1, PPX RS-422 positive transmitter output
Table 1, pin-out GPS interface connector
Pin nr/ Wire color
Function
Description
1/Red
+8-36V
Positive DC power
2/Violet
Port B RS-422 RX-
Port B RS-422 Negative receive
3/Orange
Port B RS-422 RX+
Port B RS-422 Positive receive
4/Brown
Port B RS-422 TX-
Port B RS-422 Negative transmit
5/Yellow
Port B RS-422 TX+
Port B RS-422 Positive transmit
6/White
Port A RS-422 RX-
Port A RS-422 Negative receive
7/Gray
Port A RS-422 RX+
Port A RS-422 Positive receive
8/Green
Port A RS-422 TX-
Port A RS-422 Negative transmit
9/Black
Ground
Negative DC power / ground
10/Blue
Port A RS-422 TX+
Port A RS-422 positive transmit
