tekmar 265 Boiler Control - Manual (Page 22)

© 2010 D 265 - 07/10 22 of 36
Converting the 0 - 20 mA
Output to Operate a
0 - 10 V (dc) Device
6
+
7
–
Mod 1 mA
0-10 Vdc
Actuating Motor
500 Ω resistor
0 - 20 mA converted
to 0 - 10 V (dc) output
OR
250 Ω resistor
0 - 20 mA converted
to 0 - 5 V (dc) output
The 4 to 20 mA output can be converted to 1 to 5 V (dc) using an
external 250 Ω resistor across the Mod 1 (Mod 2, Mod 3) terminals.
The 4 to 20 mA output can be converted to 2 to 10 V (dc) using an
external 500 Ω resistor across the Mod 1 (Mod 2, Mod 3) terminals.
The 0 to 20 mA output can be converted to 0 to 5 V (dc) using an
external 250 Ω resistor across the Mod 1 (Mod 2, Mod 3) terminals.
The 0 to 20 mA output can be converted to 0 to 10 V (dc) using an
external 500 Ω resistor across the Mod 1 (Mod 2, Mod 3) terminals.
The 4 to 20 mA output can be converted to a 0 - 135 Ω output for
a Modutrol IV™ gas valve actuating motor using a 0 - 135 Ω tekmar
Converter 005 (sold separately).
The 4 to 20 mA output can be converted to a 0 - 135 Ω output for
a V9055™ gas valve actuating motor using a 0 - 135 Ω tekmar
Converter 005 (sold separately).
6
+
7
–
Mod 1 mA
500 Ω resistor
4 - 20 mA converted
to 2 - 10 V (dc) output
OR
250 Ω resistor
4 - 20 mA converted
to 1 - 5 V (dc) output
Converting the 4 - 20 mA
Output to Operate a
1 - 5 or 2 - 10 V (dc) Device
+ –
1-5 or 2-10 Vdc
Actuating Motor
Modutrol IV
tekmar
B
R
W
+
-
tekmar
V9055
+
-
B
R
W
Modutrol IV™
0 - 135 Ω
Actuating
Motor
B
R
W
6
Mod 1 mA
+ –
7
Modutrol IV
tekmar
B
R
W
+
-
tekmar
V9055
+
-
B
R
W
6
+
7
–
Mod 1 mA
B
R
W
V9055™
0 - 135 Ω
Actuating
Motor
™Modutrol IV and V9055 are trademarks of Honeywell, Inc.