V3.8
OnTime Industrial Ethernet
U/R/T200 series Installation Guide
- 33 -
11/Orange w/ white
stripe
PPS
RS-422
TX+
RS-422 Pulse per second positive
transmit
12/Black w/ White
stripe
PPS
RS-422
TX-
RS-422 Pulse per second negative
transmit
Table 2, pin-out Acutime 2000 interface connector
Connector type T208:
15-pol high density D-sub type connector, female part on the switch and male part on cable
assembly..
Connection to the Acutime 2000:
The cable connector is a sealed circular 12 pole male connector of type MMP Series type
#26C-2212S1. The connector is not supplied with the antenna from Trimble and must be
ordered separately from:
Deutsch Commercial Products
5733 W. Whittier Avenue
Hemet, California 92545
Phone: (909) 765-2200
Fax: (909) 922-1544
Or Westermo OnTime networks provide cables that are pre-assembled in the Acutime end
and that is sealed and sufficient for outdoor installations. The following standard cable lengths
are available: 15, 30, 60 and 120 m
Cable length specification:
RS-422 Serial communication port
<1200m (see termination below)
RS-422 Pulse Per Second signal
<1200m (see termination below)
TTL Pulse per second
<5m (installation within single cabinet)
The RS-422 interface shall always be terminated in the receiver side at the bus end-point.
A termination resistor (120 Ohm) shall be mounted in the connector between the positive and
negative conductor.