Sc-Eq Or E-Link Bas Communications Card; Figure 20 - Lon E-Link Gateway Option - York YVAA Installation, Operation & Maintenance Instructions Manual

SECTION 7 - OPERATION
SC-EQ OR E-LINK BAS COMMUNICATIONS
CARD
Received Data (Control Data)
The chiller receives eight data values from the SC-EQ or
E-Link. The first four are analog values and the last four
are digital values. These eight data values are used as
control parameters when in REMOTE mode. When the
unit is in LOCAL mode, these eight values are ignored.
If the unit receives no valid YorkTalk 2 transmission for
5 minutes it will revert back to all local control values.
Table 13 on page 111 lists the control parameters.
031-03478-xxx
Control Board
J16
1 2 3
TB1
Connect to Printer

FIGURE 20 - LON E-LINK GATEWAY OPTION

110
LON E-LINK GATEWAY OPTION
RS - 485
SHLD
RS - 485
1
GND
2
485+
3
485-
4
+5V
5
TB2
+12V
1
GND
2
4 5 6
LON E-Link or SC-EQ interface requires communication
port set for YorkTalk2. SeeTable 11 on Page 108 for settings.
Transmitted Data
After receiving a valid transmission from the SC-EQ or
E-Link, the chiller will transmit either operational data
or history buffer data depending on the History Buffer
Request, ENG PAGE 10, found in Table 13 on page
111. Data must be transmitted for every page. If there
is no value to be sent to a particular page, a zero will be
sent. Table 13 on page 111 shows the data values and
page listings for this unit.
E-LINK GATEWAY
PORT 4
A
SHLD
B
COMM
-
+
RS - 485
PORT SHLD
2A
COMM
-
+
1
J1
PORT
2
1
FORM 201.28-NM1.1
ISSUE DATE: 1/31/2018
LON FTT10
Connection to BACnet, Modbus
or N2 BAS network (See ELINK
Installation Manual
P/N 24-10404-9 for
Installation Requirements.)
LD22443
JOHNSON CONTROLS